Fuyuan County Laochang Coal Mine Area () Laochang Coal Mine is located 60 kilometers south of Fuyuan County. It is connected by road to Fuyuan Station on the railway from Kunming to Panxian Baiguo Coal Mine. The road to Luoping County crosses the mining area. The newly built South (Ning) Kunming (Ming)

) The railway passes along the southern edge of the mining area, making transportation convenient.

The Laochang mining area spans Laochang, Yuwang and Huangnihe townships, borders Xingyi, Guizhou to the east, Fucun and Enhong coalfields to the northwest, and Guishan coalfield to the southeast. It is one of the important coalfields in southern my country.

The mining area is distributed in the northeast direction, 20 kilometers long, 10 kilometers wide, and covers an area of ??201 square kilometers.

***Divided into six exploration areas, except for the fifth exploration area which is located in the north-western wing of Laochang anticline, the main exploration areas are all located in the south-east wing. Among them, the first, second and fifth exploration areas are exploration areas, and the third exploration area is the detailed investigation area

, the fourth and sixth survey areas are census areas.

The mineralization era is about 240 million years ago.

The coal-bearing strata are the Longtan Formation and Changxing Formation of the Upper Permian, with a total thickness of 400-470 meters, containing 29-42 layers of coal, and 16 layers of recoverable and partially recoverable coal seams; 7-8 layers can be mined in the entire area, all of which are

Relatively stable to stable, thin to thick coal seams.

The coal type is high-quality anthracite.

The Laochang Coal Mine was mined in earthen kilns in ancient times. According to the "List of Mineral Products of Yunnan Province" compiled by Yu Huandong and others from 1915 to 1923, Tuozhu and Yujia Old Factory were mined by local villagers, with an annual output of about 800,000 kilograms, which were sold locally and nearby.

Domestic fuel.

The geological survey began in 1941-1942, when the Yunnan Provincial Enterprise Bureau sent Ma Xirong to the mining area to investigate; followed by Jin Yaohua and Ma Zuwang from the Southwest Mineral Survey Division of the Resources Commission, they mapped the 1:200,000 geology between Fuyuan, Luoping, Shizong and Lunan.

Figure, author of "Geology and Mineral Resources between Pingyi, Luoping, Shizong, Luliang and Lunan in Yunnan", which describes the Laochang (Bunai) mining area and estimates that the coal reserves in the southeast wing of the Laochang anticline are 10 million tons.

From September to November 1942, Su Lianghe from the Department of Geology, Geography and Meteorology of Southwest Associated University and Zhou Taixin from the Yunnan Export Mineral Products Transportation and Marketing Office of the Resources Committee went to Fuyuan to investigate relevant minerals. They wrote "Yunnan Pingyi Yujia Laochang Antimony Mine", which discussed the Laochang mining area.

Strata and structure, and pointed out that "the Luoping coal system has 7 coal layers in this area, 3 of which are more than 1 meter thick and can be mined. The coal type is semi-bituminous coal."

After the founding of the People's Republic of China, in order to search for sedimentary pyrite with industrial value, Li Yuyao in 1954 and the 523rd Team of the Southwest Geological Bureau in early 1956 visited the old factory for investigation.

At that time, Team 538 of the Southwest Geological Bureau (renamed Fuyuan Geological Team of the Yunnan Provincial Bureau of Geology in 1958, captain Wu Jianping, technical leader Jianping), based on the ancient history of sulfur refining in the Laochang mining area and the results of previous investigations, along the old factory

Carry out a systematic survey of pyrite in the lower part of the coal series at the exposed parts of the anticlinal coal series. Four ore sections including Bukit Mertajam, Yujia Laochang, Bunai, and Pupo, which have better mineralization conditions, are measured at 200-400×100-200.

Meters of exploration project network control, 76 drilling holes were drilled, and the footage was 11,605 meters, supplemented by shallow wells, tunnels and other means. In April 1959, the "Pyrite Reserve Report of Yujia Laochang, Fuyuan County, Yunnan Province" was submitted.

, calculated 593 million tons of pyrite ore; made a preliminary understanding of the coal mine, submitted the "Geological Reserve Report of Yujialaochang Coal Mine, Fuyuan County, Yunnan Province", calculated industrial reserves of 188 million tons, and was reviewed by the Yunnan Provincial Geological Bureau in 1962

, it is considered that the control is too thin, the original C1 level is reduced to C2 level, and the original C2 level is reduced to geological reserves.

The pyrite reserve report has not been approved.

In May 1960, the Sixth Geological Team of the Yunnan Provincial Geological Bureau sent Wei Lianghe and others to the mining area to conduct a half-year general survey of the coal mine, focusing on surface surveys. They constructed 10,900 cubic meters of trenches, 360 meters of tunnels, and collected 156 various samples.

1:10,000 geological survey of 45 square kilometers found that the coal-bearing strata contain 25-45 layers of coal, and 10 layers can be mined. The coal type is lean coal - anthracite, and the estimated prospective reserves are 694 million tons.

Later, due to personnel transfer, Jiao Baoyu compiled and submitted the "Preliminary Census Report on Yujia Laochang, Gumu, Fucun, and Qingyun Coal Mines in Fuyuan County, Yunnan Province" in July 1964, gaining a better understanding of the Laochang coal mining area.

In October 1972, with the end of the Enhong Coal Mine exploration work, the Sixth Geological Team of the Yunnan Provincial Geological Bureau transferred to the Laochang Mining Area to conduct comprehensive mineral survey and exploration work. Liang Weize and Xu Shanren successively served as the technical leaders of the team, 1

∶5000 topographic map was measured and produced by the Surveying and Mapping Brigade of Yunnan Provincial Geological Bureau.

In 1973, Liao Zhijie, Guo Quanyi, Wu Gengzhen and others first entered the first exploration area for general survey and exploration. In 1975, Liu Xinhan, Chen Jingze and others entered the fifth exploration area. In 1976, Wang Chongwu, Dan Xieyang and others entered the southern part of the second exploration area, comprehensively opening up the Laochang Coal Mine.

Survey and exploration of the area.

In 1977, the "Precise Geological Survey Report on the Fifth Exploration Area of ??Fuyuan Old Factory in Yunnan" was formally submitted, with proven industrial reserves of 15.08 million tons.

It was concluded that the main coal seams in the Laochang mining area are concentrated above the 19th coal seam, and it is not suitable to drill a large number of boreholes through the entire coal-bearing strata. This opinion serves as a reference for other exploration areas and saves a lot of construction costs.

In 1980, the "Intensive Geological Survey Report on the First Exploration Area of ??Laochang Mining Area, Fuyuan County, Yunnan Province" was submitted. In 1981, it was rated as an excellent exploration report by the Yunnan Provincial Geological Bureau.

The above two reports have been approved by the Provincial Reserve Committee.

The work in this section is limited to the shallow part of the mining area.

In the structural reform of the Provincial Geological Bureau in 1981, geology and prospecting were organized into separate teams, and the geological work was undertaken by the third team of the first geological brigade after formation.