Tongzi County Mugua Town Wanshun Coal Mine is located in Tieshan Village, Mugua Town, directly north of the city of Tongzi County, with the geographic coordinates: longitude 106°57′17″~106°57′45″E; latitude 28°38′21″~28°41′39″N. The mine field is defined by 17 inflection points, which are about 1.0313km2 in area, and the design mining elevation is: +950m~+454m. The mine field is circled by 17 inflection points, covering an area of about 1.0313km2, and the design mining elevation is: +950m~+454m. The mine production scale is 210,000t/a, and the service life is 13.3a. Tongzi Mugua Town Wanshun Coal Mine is a privately owned enterprise, and the industry management is subordinate to the Tongzi County Coal Administration Bureau.
Tongzi County Mugua Town Wanshun coal mine for the expansion project, in order to adapt to the needs of the rapid development of the national economy, according to the relevant provisions of the state, coal mining must comply with national industrial policy, the production capacity of smaller, less than the national safety standards of production of coal mines must be closed down, consolidation, technological transformation and expansion of energy. According to the Guizhou Provincial Coal Administration documents, on the report to solve the Zunyi Municipal People's Government to adjust the Xishui County, Tongzi County coal mine integration and layout of the program of the existence of the problem of the instructions, the Office of the People's Government of Guizhou Province, the official paper processing paper "on the adjustment of Xishui County, Tongzi County, the integration of coal mines and the layout of the program of the instructions" (Qian Coal Submission [2008] No. 5), Tongzi County, Muguazhou Town, Wanshun Coal Mine was approved for technological transformation and expansion of capacity of 210,000t/a. Mining License (No. 5200000820787) issued in September 2008 for Wanshun Coal Mine, Mugua Town, Tongzi County. The 142nd Team of Guizhou Coalfield Geological Bureau prepared the "Guizhou Tongzi County Wanshun Coal Mine Resource/Reserve Verification Report" for the coal mine in November 2007, and the total cumulative resource reserves within the scope of the mining right as of the end of August 2007 in this verification were 8,449,000t.
2. Overview of the Project
2.1, Brief Introduction of the Project
(1) Name of the Project: Tongzi County Mugua Town Wanshun Coal Mine (Reconstruction and Expansion) 210,000t/a Project;
(2) Construction unit: Tongzi County Wanshun Coal Limited Liability Company, Guizhou Province;
(3) Construction location: Tieshan Village, Mugua Town, Tongzi County;
(4) Nature of the project: Reconstruction and Expansion;
(5) Investment of the project: the total project investment of 47,946,000 yuan, the investment in tons of coal is 222.68 yuan;
(6) construction scale: the designed production capacity is 210,000t/a.
(7) service life: 13.3a.
2.2, geographic location
Tongzi County Mugua Town Wanshun Coal Mine is located in Tieshuang Village, Mugua Town, Tongzi County, Guizhou Province, 74 km due north of the county seat of Tongzi County, with the following geographic coordinates: longitude 106°57′ East 17″~106°57′45″; north latitude: 28°38′21″~28°41′39″. The tendency width is about 0.2km, the strike length is about 6.1km, and the area of the wellfield is 1.0313km2.
2.3, wellfield boundary
According to the delineation of the wellfield scope in the mining license (5200000820787) issued by the Department of Land and Resources of Guizhou Province in September 2008, the wellfield scope of the mine is circled by 17 inflection points. The area of the well field is 1.0313km2, the strike length of the well field is about 6.1km, the inclination width is 0.28km, and the mining depth: the mining depth is from +950 to +454m.
2.4, Composition of the construction project
The proposed project ground facilities mainly include the industrial site, the air shaft site, gangue yard and pedestrian shaft, and the industrial site and the air shaft site will utilize the production facilities of the former Wanshun The industrial site and the air shaft site will utilize the production facilities of the former Wanshun coal mine, and will not occupy any new land; the gangue yard will be transformed to utilize the gangue yard of the former Wanshun coal mine, and will occupy 6,800m2 of new sloping cultivated land; the transformation will utilize the former +970m return air shaft of the former Shawan coal mine as the pedestrian well of the project, and the transformation will utilize a part of the former industrial site of the former Shawan coal mine as the pedestrian site of the construction project.
2.5, the construction project site and general layout
The total **** of the construction project consists of five parts, which are the industrial site, the wind shaft site, the pedestrian shaft site, the blasting equipment warehouse and the gangue yard.
①Industrial site
Based on the topography of the area where the coal mine is located, the industrial site is located on a slope arrangement. The industrial site all utilizes the former Wanshun Coal Mine industrial site, located in the southwest of the well field range, adjacent to the Water Milky Way, covering an area of about 9,400m2, with no new occupation, and the occupation type is industrial and mining land.
②Windshaft site
The windshaft site is located on the hillside about 1.5km north of the industrial site of the construction project. All of the former Wanshun Coal Mine wind shaft site is utilized, and no new land is occupied. The wind well site covers an area of 1,200m2, and the occupation type is industrial and mining land.
3) Pedestrian shaft site
The pedestrian shaft site is set on the hillside of about 1.1km in the northeast of the industrial site, and the pedestrian shaft site is transformed into a part of the former Shawan Coal Mine's industrial site, with an occupying area of about 200m2; the pedestrian shaft is utilized in the former Shawan Coal Mine's return-air inclined shaft, with a natural elevation of the entrance of the pedestrian shaft of +970m; the site is set up with pedestrian shafts and a duty room for the maintenance personnel of the pedestrian shafts. Maintenance personnel's duty room is set up in the site.
4 Gangue Yard
The gangue of the mine is considered at 10% of the designed output, i.e. 21,000t/a. A gangue yard is set up in the natural gully at the northwestern part of the industrial site about 4km away from the well field, and the gangue yard of the construction project occupies an area of about 9,800m2, and the type of the occupied area is sloping arable land, among which 3,000m2 is the transformation and utilization of the former Wanshun Coal Mine's gangue yard, and about 6,800m2 of sloping arable land is occupied by the new gangue yard. There is a 90m3 drenching pool arranged in the site.
⑤ Blasting Equipment Depot
The proposed blasting equipment depot is located in the northwest side of the boundary of the industrial site, occupying an area of 180m2, and the type of occupied land is mainly barren slope land.
3, the environmental impact and prevention measures during the construction period
3.1, construction profile
The proposed project will be dug with 2 boring heads during the construction period, and all the construction works can be completed in about 20.9 months after the commencement of the construction work, together with the preparation time for the construction of 2 months, and the installation of equipment in the working face and the joint test turn of 3.5 months, the construction period of the mine will be 26.4 months. The mine can reach its design capacity in the year it is handed over to production.
The underground works to be completed during the construction period include three shafts: the main industrial site (renovation), the windshaft site (renovation), and the pedestrian site (renovation); as well as new construction and renovation of the roadway and refuge works, and the installation of equipment for the first mining face and commissioning work.
The underground works to be completed during the construction period include the following: the main level refuge at the industrial site, the return air inclined shaft at the air shaft site, and the pedestrian shaft at the pedestrian shaft site (inclined shaft); as well as the related roadway works, the refuge works, and the installation and commissioning of the equipment for the first mining face.
The ground works mainly include coal storage yard, gangue yard, coal storage yard track, access road, air compressor room, living pool, production fire fighting pool, boiler room, bathroom, staff dormitory, substation and power distribution room, production office complex, canteen, pit wood processing room and pit wood yard, mine water treatment station, domestic sewage treatment station; wind turbine room and duty room in the wind shaft site; Duty room in the site of pedestrian shaft; off-site gangue yard, gas pump room, blasting equipment store and other facilities. The total area of industrial buildings (production, administrative, public **** buildings, etc.) to be completed during the construction period of the mine is 3780m2; the area of hardened site (excluding gangue field) is 4500m2; the total volume of pool (excluding water treatment station) is 550m3; the volume of shaft project is 9715m, of which the renovation of the original use of rocky tunnel is 6097m, the new rocky tunnel is 1718m, and the new coal tunnel is 1900m.
3.2 Main environmental problems during the construction period
Based on the construction content of this project, the main environmental problems during the construction period of the proposed project are as follows:
(1) The renovation and demolition of ground facilities at the industrial site, the renovation of the site of the wind shaft, and other site leveling, as well as excavation of foundations, and the temporary stacking of soil and waste residues during the construction period will destroy the ground vegetation and have certain negative impacts on the ecological environment. will have certain negative impacts on the ecological environment.
(2) The movement of earth and rocks for additional site leveling works such as industrial site, wind well site and pedestrian well site renovation, and the preparation of building construction materials will increase the amount of local traffic and transportation, which will adversely affect the local transportation conditions, as well as the acoustic environment on both sides of the road and around the construction site.
(3) The preparation of "five passes and one leveling", "earth moving" and "three materials" for the construction site will increase the amount of local traffic and transportation, which will have an adverse impact on the local traffic and transportation conditions, as well as the acoustic environment on both sides of the road and around the construction site. It will have an adverse effect on the local transportation condition and the sound environment on both sides of the road and around the construction site.
(4) The gathering of construction workers during the construction period will put pressure on the local food and vegetable supply, food service industry, cultural facilities and other socio-economic environment.
(5) Adverse impacts on the ambient air caused by the stacking of bulk materials, the bare ground surface formed by leveling the site, the dust from the construction process and transportation, and the smoke from the living stoves during the construction period.
(6) The discharge of living sewage and construction wastewater from the construction team will have a certain impact on the surface water body. The shaft construction process will uncover part of the groundwater aquifer, plus a small amount of gushing water at the initial stage of the well and the original shaft drainage during the roadway renovation process, which will have an impact on the groundwater resources.
3.3 Measures for sewage and waste water treatment during construction period
Since the mine water treatment station of the proposed project has been completed, the evaluation requires that the mine water generated by the construction should be discharged through the mine water treatment station after reaching the standard, so as to avoid the impact of its direct discharge on the quality of water in the Milky Way; at the same time, the EIA requires that the construction wastewater should be reused in the construction operation through the simple precipitation treatment to avoid the impact on the surface water of the project area. Meanwhile, the EIA requires the construction wastewater to be treated by simple sedimentation and reused in the construction operation so as not to affect the surface water of the project area.
For the domestic sewage during the construction period of the proposed project, dry toilets will be set up in the construction area of the industrial site, and a small amount of cafeteria sewage and daily life sewage will be treated by grease traps and sedimentation tanks to ensure that a small amount of domestic sewage will be discharged in compliance with the standards, so as to reduce the impact of direct discharge on the water quality of the Water Milky Way; the EIA will arrange for the construction of the domestic sewage treatment station as soon as possible, and put it into use at an early date, so that domestic sewage can be treated in compliance with the standards and discharged. Discharge after treatment to meet the standards.
Through the implementation of the above measures, the impact of sewage on the water quality of the Milky Way during the construction period of this project is relatively small.
3.4 Air pollution prevention and control measures during the construction period
In order to prevent environmental air pollution caused by dust and exhaust gas generated by surface excavation and construction machinery during construction, the following specific pollution prevention and control measures need to be taken during the construction process.
(1) Reasonable construction organization, engineering construction plan design, try to achieve the balance of earth and rock excavation, filling, earth and rock excavation in time to send to the filling place, and compaction, in order to reduce the generation of dust; the hardening of the ground in each field area and the greening should be synchronized in the construction period.
(2) Strengthen the use of construction machinery management and maintenance and repair, improve the efficiency of machinery and equipment, shorten the construction period, reduce the fuel machinery exhaust emissions, minimize its adverse effects.
(3) The excavation area should be strengthened to clean the ground to prevent dust from spilling everywhere; the transportation vehicles should be cleaned when driving away from the workplace; overloading and speeding of vehicles are strictly prohibited to prevent secondary dust generation in transportation.
(4) the construction process of cement and other fine particles used in bulk materials, should be stored in the warehouse or closed storage, avoid open piling, the spilled cement and other dust in a timely manner to sweep. Transportation of fine-grained materials using closed tanker transportation, loading and unloading to take measures to reduce the amount of dust.
(5) A small amount of roadway coal is transported out for sale in time, and attention is paid to dust and water sprinkling during storage and transportation.
3.5 Noise control measures during the construction period
In order to meet the requirements of Noise Limit Value of Construction Site Boundary (GB12523-90), the project must still take the following noise control measures in the remaining construction works:
(1) Adopt the low-noise equipment as much as possible and take regular maintenance and care of the equipment, so as to reduce the noise of the machinery and equipment due to the vibration and increase of its working due to the loosening of the parts. Vibration, etc. and increase the sound level of mechanical equipment due to loose parts; idle equipment closed in a timely manner; transportation vehicles into the construction site is strictly prohibited to sound the horn; concrete mixing plant and other strong noise sources should be set away from residential areas, and take appropriate noise reduction measures.
(2) operate mechanical equipment according to regulations, reduce collision noise in the process of bracket dismantling, reduce the impact of man-made noise on the acoustic environment, loading and unloading of materials should be light to do light, civilized construction.
(3) Reasonable arrangement of construction time, try not to use high-noise equipment at night, noise value greater than 85dB (A) of the equipment is limited to daytime operation, is strictly prohibited in the night from 22:00 ~ 6:00 the next day construction; materials into the field should be arranged during the day, to avoid the impact of the villagers to enter the field at night to rest. Construction as much as possible to avoid generating controllable noise, it is strictly prohibited vehicles entering and exiting the site when the high pitched siren, if the project needs must be constructed at night, should be reported to the local environmental protection bureau and the government 5 days before the start of the project to approve the consent of the local government before proceeding, and announce the nearby residents in advance, so that they can make good arrangements.
(4) Strengthen the environmental management of noise during construction. The construction site should implement the "construction site noise limit and its measurement method" (GB12523-12524), and the construction company to monitor and record the noise value of the construction site, exceeding the limit value must be adjusted construction intensity. In addition, it should also accept the supervision and management of the administrative department of environmental protection, take the initiative to coordinate the relationship with the nearby village settlements, the residents who are disturbed by the construction should be notified in advance to obtain understanding, and the environmental complaints of the village residents should be resolved in a timely manner to avoid nuisance incidents.
3.6, the construction period of ecological environment comprehensive protection measures
(1) to strengthen the awareness of ecological environmental protection
① The construction unit should be combined with the original occupation of the mine project and the new occupation of land, the destruction of vegetation, and seriously do a good job of the project to integrate the construction period of soil and water conservation and ecological restoration, construction work.
② Improve the environmental management of the integration of the construction period, the establishment of environmental management organizations, clear its functions, the implementation of ecological impact protection and restoration of supervision and management measures.
(2) Soil erosion prevention and control measures
① Temporary piles of earth and stone shall not be arbitrarily disposed of during construction, so as not to cause serious soil erosion in case of strong rainfall.
② In the ground construction process for the construction of damaged areas, construction is complete, to level the land in a timely manner, and planting suitable plants to prevent new soil erosion.
③ For the industrial site construction area, the second mining area wind shaft site reconstruction construction area, in order to avoid new soil erosion, should be considered to take the installation of drainage ditches and other appropriate engineering measures.
(3) Vegetation protection and restoration measures
①The overall layout should be optimized in the design stage, and the new land should be occupied as little as possible in woodland, scrub, natural grassland and other plots of good vegetation, in order to minimize the damage to the topsoil and vegetation, and generate new soil erosion.
② project construction process should be strengthened management, as far as possible, the construction of temporary land in the permanent occupation of the scope of the temporary footprint control to a minimum, so as not to increase the destruction of soil and vegetation area.
3) Protect and utilize the matured soil of the surface layer, and concentrate the matured soil of the surface layer before the construction; when the construction disturbance is over, then mulch the soil in the newly shaped geomorphic area, so as to facilitate the recovery of vegetation.
3.7 Impact on social environment and living environment
The gathering of construction workers and migrants during the construction period of the proposed project will bring certain pressure on the local food and vegetable supply, food service industry and other social and economic environment. The supply of food and vegetables for the construction workers and mobile population during the peak period can be solved by purchasing through the commodity circulation market under the current market economic conditions, which will not affect the normal life of local rural residents. Rather, it will help drive the local economy to diversify the agricultural economy, accelerate the development of town construction and tertiary industry, and increase the economic income of farmers. At the same time the construction process will also promote the development of local industry and transportation, social and economic conditions will be improved.
4, the environmental impact of the operation period and preventive measures
The project's operation period of the main production of pollution links, workplaces are set in the underground, the impact on the surface is mainly manifested in the following: due to the underground coal seam mining caused by the movement or deformation of the ground surface, the gangue discharged from the underground mining, the underground drainage and industrial site sewage impact on the surface of the water body, the noise generated by the production system, dust and other impacts on the environment. and dust on the environment.
4.1 Non-pollution ecological environmental impact and protection program
(1) Analysis of ecological environmental impact factors
According to the characteristics of mineral resources development and construction projects, combined with the natural environment of the location of the mine, the current situation of environmental quality, the project in the mining process, the impact on the ecological environment is mainly manifested in the following aspects: surface deformation: due to the well field belongs to the mountainous topography. Coal mining will not form a large surface subsidence basin, surface deformation is mainly manifested as cracks, local areas of collapse pits, causing landslides and so on. The surface deformation is mainly concentrated in the outcrop area where the ore layer is shallowly buried, and the houses in this area may be damaged due to the impact of coal mining.
① Surface deformation: Because the well field is mountainous terrain, coal mining will not form a large surface subsidence basin, the surface deformation is mainly manifested as cracks, localized areas of collapse pits, causing landslides, etc. The areas where surface deformation occurs are mainly concentrated in the area of shallow outcrops. The area where surface deformation occurs is mainly concentrated in the outcrop area where the coal seam is buried at a shallow depth, and the houses in the area may be damaged due to the impact of coal mining.
② The impact of water resources: the surface cracks formed in the coal mining process may be connected to the surface water body, so that the surface water leakage, affecting the development and utilization of water resources, the spring in the well field, etc., causing a certain impact, which may jeopardize the agricultural production and the farmers' living drinking water source.
③ Agriculture, forestry, ecological environment and resource utilization: Underground coal seam mining leads to local area (especially the coal seam outcrop area closer to the ground) surface subsidence, surface deformation, etc., so that the upper part of the well-field agro-ecological environment is affected, the impact of water resources, land resources, and damage to the existing arable land cultivation conditions. The local groundwater in the area will be drained, affecting the growth of surface vegetation and bringing certain impacts on forestry ecology.
4 Exacerbate soil erosion: industrial sites, wind well sites and gangue dumps damage the original landforms and form new plastic slopes, which are prone to soil erosion, and the deformation of the ground surface and the drying of surface water will aggravate soil erosion on the slopes of the well field area.
⑤ Influence of geomorphology: the area where the industrial site of the construction project is located belongs to the river valley, and most of the sides of the industrial site are cliffs, and the underground coal mining will bring certain adverse impacts on the steep cliffs.
(2) Ecological environment unfavorable mitigation measures
The most effective way to prevent and control the impact of surface subsidence on the ecological environment is to leave security pillars, the design of the well field within the scope of the industrial site, the wind well site, the pedestrian well site and residential settlements and other protection targets to leave security pillars, the inappropriate to leave pillars of the facilities are proposed to be assigned to carry out inspections and find problems in a timely manner; the farmland depending on the degree of damage, according to the relevant regulations, and the project will be implemented in accordance with the relevant regulations, the project will be carried out in accordance with the relevant regulations. Depending on the degree of damage, the farmland will be reclaimed in accordance with relevant regulations. Coal mining may affect the local residents' living water problems, and the construction unit should have detailed measures to solve the drinking water problems of rural people and animals.
Greening the industrial site, the wind shaft site and the pedestrian shaft site, so that the site has a good ecological environment. Greening in accordance with the pollution reduction, landscaping perspective, selecting anti-dust and landscaping function of good tree species, in the workshop, near the plant plant planting tall shade trees, configuration of shrubs and lawns and flowers and other plants, transport roadside planting small trees, shrubs and hedges, etc..
4.2 Water pollution and control measures
The water consumption units of the proposed project are mainly the canteen, bathroom, laundry, office and other living water in the industrial site, as well as the dust sprinkler in the mine underground, and the cooling supplement water of the gas pumping station, etc. Among them, the office, bathroom, laundry, etc. utilize the water. Among them, the office and canteen utilize raw water from the water source, and the production water uses treated mine water. Wastewater during the operation period of the proposed project is mainly divided into mine water, domestic sewage, gangue yard drenching water and coal storage yard rainwater.
(1) mine water
According to the "Mining Program Design Manual", the amount of mine water of this project is 673.9m3/d; according to the monitoring data of the proposed project, the pollutants of the mine water are mainly mine dust and rock dust, and the main pollutants are SS, COD, Fe, and Mn, etc. The mine water is mainly used for the dust control of the ground production system after being treated in the mine water treatment station and meeting the standard. After being treated by the mine water treatment station and meeting the standard, the mine water is mainly used for dust prevention in the surface production system, cooling supplement water of the gas pumping station and dust prevention sprinkling in the underground, and the excess is discharged to the Water Milky Way through the sewage ditch on site. The amount of reuse is 337.23m3/d, and the remaining 336.67m3/d is discharged in compliance with the standard, and the reuse rate of mine water is 50.04%.
The completed mine water treatment station of Wanshun Coal Mine adopts SJS integrated water purifier. According to the monitoring results of mine water in the "Environmental Status Monitoring Report of Wanshun Coal Mine, Mugua Town, Tongzi County" (Zunhuan Supervision Report [2010] No. 404) completed by Zunyi Municipal Environmental Monitoring Center Station on August 19, 2010, it is known that the mine water treated by the mine water treatment station can satisfy the requirements of the "Pollutant Emission Standards for the Coal Industry" (GB20426-2006).
(2) domestic wastewater
The volume of domestic wastewater and industrial site production wastewater of the proposed project is 112.76m3/d, and the main pollutants are COD, SS, BOD5, NH3-N, etc. Referring to the statistics of water quality of production and domestic wastewater of the industrial site of the same kind of coal mines in Tongzi County of Zunyi City, Guizhou Province, the quality of production and domestic wastewater produced by the proposed project is determined. The quality of wastewater is shown in Table 2.4-2. The EIA recommends the use of integrated domestic wastewater purifier with the effect of nitrogen and phosphorus removal to reach the "Comprehensive Wastewater Emission Standards" (GB8978-1996) level 1 standard after treatment, and then discharged through the site sewage ditch into the water galaxy of the immediately adjacent industrial site. The scale of domestic sewage treatment station is 140m3/d.
(3) gangue drenching water
Gangue drenching water generation and gangue field catchment area, the atmospheric rainfall is very close, in view of the gangue field catchment area is large, in the process of construction should be dug in the gangue field around the interception of the drainage ditch, the gangue field outside the scope of the flood diversion to the gangue field outside the check dam discharge; For rainwater in the gangue field set up sedimentation tank.
(4) Coal storage field rainwater
Rainwater washes over the coal stacking yard, generating wastewater with high SS content, the EIA proposes to harden the ground of the industrial site and set up diversion ditches around the coal storage yard, and the washed-out rainwater will be transported to the mine water treatment station for treatment; and build a simple rainproof trellis on the coal storage yard to minimize the drenched rainwater generated by the coal storage yard.
4.3 Air pollution and control measures
The main air pollutants after the completion of the proposed project are the smoke generated by the coal-fired boiler, and the dust generated by the coal storage yard, gangue yard, raw coal transloading and loading point, and transportation road.
(1) gangue dump and coal storage yard dust
Gangue dump, coal storage yard dust with the ground wind speed, particle size, according to the test, gangue and coal dust starting wind speed and particle size of the correlation (the minimum wind speed to produce dust).
Wanshun coal mine gangue dump in the area, the annual average wind speed of 1.6m/s, gale appears less likely, according to the gangue starting wind speed and particle size interrelationships, the coal mine produced by the gangue dust is less likely to have a small impact on the environment.
Summer wind speed is larger, in the coal storage yard stacked coal moisture content is lower under the conditions will produce dust, dust is mainly concentrated in the summer. During the production process, the watering and dust prevention work of the coal storage yard is strengthened, and the transportation vehicles entering the coal storage yard are swept and washed to reduce the generation of dust in the coal storage yard.
(2) Dispersed dust generation of ground production system
The dust generation points of the ground production system mainly include: reproduction points and loading points, etc. For on-site transportation, as long as a reasonable choice of storage and transportation methods and the necessary control measures, the impact of its dust on the ambient air can be effectively controlled, and the impact on the environment is small.
(3) Mine Ventilation
Wanshun Coal Mine is designed as a high-gas mine, with methane as the main component of gas in the mine, and the mine implements pumping and draining of gas. In addition, the exhaust gas discharged from the ventilator contains a large amount of dust (mine dust), which mainly exists in the form of aerosols. The dust settles on the surface of plants under the action of wind, affecting the photosynthesis of the plants and inhibiting their growth. In the underground mining process to strengthen the underground dust control measures, the pollutant content in the mine ventilation exhaust is greatly reduced, and the impact of ventilation exhaust on the environment is small.
(4) Coal-fired boilers
The coal-fired boilers of the proposed project are one of the main sources of air pollution of the project. There is one LSD2.0-7-AⅢ type coal-fired boiler (production boiler) in the boiler room of the industrial site, and one CLSG0.095-95/70-AⅢ type coal-fired boiler (living boiler) in the canteen of the living area. The production boiler and the living boiler run for 10h per day and 330d per year, using the raw coal produced in the mine as the combustion coal of the boiler (ash content of 20.50%, sulfur content of 2.55%, calorific value of 26.00MJ/kg); the coal consumption of the production boiler is 85kg/h (280.5t/a), and that of the living boiler is 10kg/h (33t/a). Coal-fired lime added sulfur fixation (sulfur fixation efficiency of about 60%), and the use of wet-type desulfurization dust collector flue gas treatment through the induced draft fan into the chimney exhaust into the atmosphere, the concentration of pollutants in the flue gas of the treated boiler to meet the "Boiler Air Pollutant Emission Standards" (GB13271-2001) in the Ⅱ time period of the second class area standard requirements.
4.4 Solid wastes and management measures
The main solid wastes of the proposed project during the operation period are gangue, domestic garbage, boiler slag, coal sludge and sludge from water treatment system.
The amount of coal gangue generated during the production and operation period of the proposed project is 21,000t/a, and the mining gangue and a small amount of hand-selected gangue discharged from the main refuge are temporarily stockpiled in the turnover gangue yard next to the coal storage yard, and then transported to the Limin Shale Brick Factory in Mugua Town, Tongzi County, as the raw material for brick-making for sale, and when it cannot be utilized in time, it is transported by automobile and temporarily stockpiled in the gangue yard; the slag and the coal sludge generated from the coal-fired boiler will be used together with the coal sludge and sludge. The slag and gangue from the coal-fired boiler are processed together; the total population of the mine in the proposed project is 325 people, and the living garbage is calculated at 0.8kg per person per day, and the total emission of living garbage is 85.8t/a, and the garbage collection points are set in the main buildings and workplaces of the industrial site, and transported to the designated places of the local sanitation department for unified digestion and treatment; the amount of coal sludge generated by the mine's water treatment station is about 110.3t/a (dry basis), and the coal sludge is dewatered and transferred to a temporary storage of gangue yard. ), the coal sludge is mixed into the final coal for sale after dewatering treatment, and no coal sludge is discharged; the sludge generated from the domestic sewage treatment station is about 5.02t/a, which is disposed of together with domestic garbage.
4.5 Acoustic pollution and control measures
The main noise sources of Wanshun Coal Mine are pit wood processing room, mechanic workshop, winch room, air compressor room, ventilator room, gas pumping station, raw coal transportation noise and various pumps.
The gas pumping station is equipped with mufflers, sound-absorbing treatment on the walls of the room, and sound-insulating doors and windows; the ventilator is set up in the ventilator room, and the intake ducts of the ventilator are made of concrete, with the ducts lined with sound-absorbing lining boards, and the diffusion port is equipped with a sheet-type muffler, and the exhaust port is set up with a diffusion tower; the air compressors are equipped with air-intake mufflers, and the doors and windows of the air compressor are insulated by double glass and the pressure air ducts are equipped with external sound-absorbing materials; the electric saws of the pit-log processing room are prohibited to work at night; All kinds of water pumps do damping foundation, pipeline using flexible rubber joints; drum, induced draft fan and water pumps set up sound insulation room, installation of vibration damping foundation; blower inlet, induced draft fan outlet muffler installation; sound insulation of housing structure.
5. Conclusion
The construction of the proposed project will provide high-quality power coal to the society; it is in line with the requirements of the national coal industry policy and environmental protection policy, and provides the needs of the national implementation of the western development and the "West-East Electricity Sending" coal, and at the same time, it has a positive effect on the promotion of the local economic development, and the construction of the project is necessary. The construction of the project is necessary.
The composition, location, layout, scale and process of the proposed project are reasonable and feasible; the public support rate is high; the mine water, gas and coal gangue are all required to be comprehensively utilized; the ecological comprehensive remediation plan has been formulated for the subsidence area; and the chances of the occurrence of the environmental risk accidents and the intensity of the accidents are small. The EIA report and mining program design proposed by the pollution prevention and ecological protection measures in other mining areas in Guizhou have successful examples, practice has proved to be feasible and reliable, so as long as the strict implementation of the adverse impacts of the control in the environment within the acceptable range, but also can lead to local ecological construction.
Contact information of the evaluation unit:
You can contact the EIA unit of this project to check the short version of the environmental impact report and related information.
Unit name: Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences
Contact person: Wang Xiaoguang
Contact phone: 0851-6814276
Correspondence address: No. 92 Zhongshan East Road, Zhengding Town, Zhengding County, Hebei Province
Postal code: 050061
Solicitation of public opinion Scope and Main Matters
The scope of soliciting public opinions is mainly residents in the vicinity of the project and people who are interested in the project. The main issues include whether you are satisfied with the current state of environmental quality, whether you know or understand the project, from what information channels you learned about the project, what you think are the hazards (impacts) of the implementation of the project on the quality of the local environment, what is your attitude towards the project, and what are your suggestions and requirements for the implementation of the project in terms of environmental protection.
The starting and ending time for public comments is:
November 18, 2010 ~ December 3, 2010, *** 10 working days.