(a) the accuracy of coal geological exploration, rapid construction and the technical level of roadway excavation have been continuously improved.
The fine geophysical exploration technology with high-resolution 3D seismic exploration technology as the core, combined with the application and popularization of other high-precision and digital exploration technologies, has greatly improved the fine exploration degree of mine fields and provided resource guarantee for large-scale mine design. The level of mine construction under the condition of deep well and thick alluvium is constantly improving. Drilling method and freezing method have basically solved the problem of well construction in nearly 600 meters thick loose alluvium, reaching the international leading level; Breakthrough progress has been made in the technology of thousand-meter deep sinking, and the construction speed of vertical shaft has reached more than 230 meters per month, setting a world record. The tunneling technology and equipment of coal roadway and semi-coal roadway have made great progress, and a series of highly reliable semi-coal roadway boring machines have been successfully developed. The application of the new technology of bolt and cable support in roadway has significantly improved the mechanization level of roadway excavation construction and provided a strong technical guarantee for China's modern mine construction.
(2) The level of complete sets of fully mechanized mining equipment has been improved, and great achievements have been made in the construction of high-yield and high-efficiency mines.
In recent years, we have independently developed high-power electric traction shearer with international advanced level, powerful hydraulic support with electro-hydraulic control function, large-capacity heavy scraper conveyor and loader, and large-inclined belt conveyor, which can provide complete sets of equipment and coal mining technology for fully mechanized mining face with coal seam thickness of about 5 meters, support capacity of 2,500 tons per hour and annual production capacity of 6 million tons, and realize high yield and high efficiency under complex mining conditions. By the end of 2005, there were 197 coal mines that met the requirements of high-yield and high-efficiency mine construction in China, with a coal output of 635 million tons, per capita work efficiency 17.5 tons and a mortality rate of 0. 045 million tons. The main technical and economic indicators are close to or reach the world advanced level.
(three) coal mine gas, fire protection and other technologies have been continuously improved, and the level of safety production technology has been improved.
In order to fully implement the policy of "pumping before mining, monitoring and measuring, and determining production by wind", gas drainage technologies such as surface drainage, local coal seam drainage, adjacent coal seam drainage and goaf drainage have been widely used. At present, more than 90% of the former state-owned key coal mines with high gas and gas outburst have been pumped out, with an annual pumping capacity of more than 2 billion cubic meters, of which 40% is used for gas power generation or as civil fuel. The whole mine safety monitoring system and remote centralized monitoring system based on computer network system have been widely used and played an important role in the monitoring and prevention of coal mine gas accidents. Research and development of geophones, microseismic monitoring systems and electromagnetic radiation devices are used to predict mine dynamic disasters, so that the accuracy of regional prediction without dynamic disasters can reach 100%, and the accuracy of regional prediction with possible dynamic disasters can reach over 80%. At the same time, a breakthrough has been made in the research on the new technology of fire identification and control in mining areas, and the technology of early prediction and grouting fire extinguishing in mine fire areas has matured and been widely used. Due to the continuous innovation and popularization of coal mine safety production technology, the overall situation of coal mine safety production tends to improve, and the number of coal mine accident deaths and the death rate of one million tons in the country during the Tenth Five-Year Plan period showed a downward trend.
(4) The technical level of clean coal has been continuously improved, and the comprehensive processing and utilization technology of coal resources has been accelerated.
Coal washing and processing is the source of clean coal technology. After more than ten years of research, dense medium coal preparation technology has made positive progress and been widely promoted, and the traditional coal preparation technology has also been upgraded. At the same time, the flotation technology is becoming more and more perfect, which effectively improves the recovery rate of clean coal and flotation effect. At present, China's self-developed coal washing technology and equipment can meet the needs of the construction of large coal preparation plants with an annual output of 5 million tons.
In recent years, coal-related resource utilization technology and environmental protection technology have also developed rapidly. Positive progress has been made in the research and development of coalbed methane extraction and utilization technology, coal gangue power generation, land reclamation, clean mining and mine water resource utilization technology, and the ecological environment protection and circular economy development in mining areas have achieved initial results. In terms of comprehensive processing and utilization of coal resources, coal chemical technologies such as clean combustion technology, coal gasification and liquefaction technology have gradually developed from industrial experimental research stage to industrialization and industrialization stage. Production lines with an annual output of 500,000 tons of methanol and 6.5438+500,000 tons of dimethyl ether have been completed and put into operation, and coal processing and conversion technology is expected to make a major breakthrough in the near future.
Second, the challenges faced by technological progress in the coal industry
Due to the complex coal seam occurrence conditions, large proportion of underground mining, large number of small and medium-sized mines, multi-level coal mining technology, backward overall technical level and safe production level of coal mines, the research on clean development and utilization of coal resources started late, and the technology is not mature enough, so the environmental pollution caused by direct combustion of a large number of coal is quite serious. To solve a series of major problems in the healthy development of coal industry, we must rely on technological progress and innovation to comprehensively improve the overall technical level of coal industry.
Three, "Eleventh Five-Year Plan" coal industry scientific and technological progress and development goals
The coal industry should fully implement the spirit of "Several Opinions" and take a new road of industrialization with high resource utilization rate, safety and security, good economic benefits and less environmental pollution. The development goal of scientific and technological progress in China's coal industry should focus on the construction of large-scale coal bases, safe and efficient production technology of coal mines and comprehensive processing and utilization technology of coal, carry out comprehensive research, focus on breakthroughs, strengthen innovation, lead development, realize green mining, develop circular economy, and achieve a breakthrough in the overall technical level of coal resources development and utilization in China. By the end of the Eleventh Five-Year Plan, the contribution rate of science and technology to the economic development of the whole industry will reach more than 40%.
Four, "Eleventh Five-Year Plan" key areas of coal science and technology progress
(a) the field of resource exploration and mine construction
In the field of resource exploration and mine construction, we will focus on the research and development of high-precision, high-resolution and high-reliability geological exploration technologies and equipment, improve the accuracy of geological structure exploration, and provide reliable geological guarantee for the construction of large coal bases and the exploitation of resources under complex stratum conditions in China. At the same time, the research on the occurrence law of deep coal seam resources, exploration and mining technology, deep efficient prospecting and rapid exploration technology in the central and eastern regions will be carried out to solve the theoretical and technical problems of subsidence under the 600-meter-deep alluvium, and provide theoretical basis and technical means for the efficient and safe mining of deep coal resources in China.
(2) the field of coal resources development
In the field of coal resource exploitation, modern processing, intelligent control technology and working condition monitoring technology are used to develop high-power and high-reliability coal mining equipment, so that the production capacity of underground mining face can reach more than100000 tons/year, and the production capacity of large open-pit coal mines can reach more than 20 million tons/year. At the same time, the level of thin coal seam mining technology and short arm mining equipment has been improved, which makes coal mining equipment more suitable for the mining conditions of various complex coal seams and comprehensively improves the mechanization and mechanization level of coal mining technology in China.