Brief introduction of coal resources development in Shanxi province for 50 years;
It is found that the total area of Shanxi Province is about 6.5438+0.56 million square kilometers, and the coal-bearing strata are about 64.8 million square kilometers, accounting for about 40% of the province's area. The main coal-forming ages are Carboniferous-Permian and Jurassic. According to the development characteristics and structural combination of coal-bearing strata, Shanxi coal-bearing areas are divided into 6 large coalfields and 8 small coal-producing areas. The six major coalfields are: Datong coalfield, Ningwu coalfield, Taiyuan Xishan coalfield, Qinshui coalfield, Huoxi coalfield and Hedong coalfield. These eight coal producing areas are: Hunyuan coal producing area, Wutai coal producing area, Fan Shi coal producing area, Lingqiu coal producing area, Guangling coal producing area, Yanggao coal producing area, Yuanqu coal producing area and Pinglu coal producing area. The six coalfields cover an area of about 60,000 square kilometers, accounting for 92% of the coal-bearing area in the province.
Proved: The total coal resources at 2000m depth and shallow depth is 660 billion tons, accounting for 1 1.9% of the total coal resources in China, ranking third in the country after Xinjiang Uygur Autonomous Region and Inner Mongolia Autonomous Region. By the end of 2004, the province had accumulated more than 280 billion tons of proven coal resources and 260 billion tons of reserves, accounting for 26% of the country's proven reserves, ranking first in the country. Of the nine administrative counties (cities, districts) in the province1/kloc-0, 94 have coal resources, of which 68 counties (cities, districts) have an annual coal output of more than one million tons.
Proved: Shanxi coal resources are of excellent quality and complete coal types, ranging from low metamorphic lignite and long flame coal to high metamorphic lean coal and anthracite. The distribution characteristics of coal types are: from north to south, the degree of coal metamorphism gradually increases, and according to this, low metamorphic coal (long flame coal, non-caking coal, weakly caking coal, 1/2 non-caking coal), medium metamorphic coal (gas coal, gas fat coal, fat coal, 1/3 coking coal) and high metamorphic coal (lean coal) are distributed. According to the national standard of China coal classification 1986, there are 14 brands of coal in Shanxi, among which Datong's thermal coal, Yangquan's anthracite, Jincheng's anthracite and Liu Li's and Xiangning's rare coking coal are large in reserves and widely distributed, which have a good brand effect in the market. Weak caking coal in Datong coalfield is famous at home and abroad for its low sulfur, low ash and high calorific value. The main coking coal in Lishi, Liulin and Xiangning mining areas of Hedong coalfield is known as "fine powder" in coal; The "blue charcoal" in Jincheng mining area of Qinshui coalfield is even more famous, and it is a good product of coal conversion.
Facts have proved that the conditions for the development of coal resources in Shanxi are good. Except for the flat land area of Ningwu coalfield in the north, where the coal seam is more than 8m thick and shallow buried, which is suitable for open-pit mining, most of the other areas are medium-thick coal seams, with simple and medium overall geological structure, stable thickness of main coal seams and low gas content in most coal seams, which is suitable for underground mining.
It is found that coalbed methane is a kind of self-generated and self-stored natural gas and a new clean energy source. Its composition is mainly methane, which is mostly filled in various pores of coal in three States: adsorption, dissociation and dissolution. There are 13 blocks in six coalfields in Shanxi. Among the 12 large natural gas-rich areas in China, Yangquan-Shouyang, Lu 'an, Jincheng, Sanjiaobei and Liu Li-Sanjiaowu are occupied by our province. The coalbed methane resources in Shanxi are about 10 trillion cubic meters, accounting for two-thirds of the national 14.34 trillion cubic meters, ranking first in the country. Among them, the central Hedong coalfield and the northern and southern Qinshui coalfield are rich in resources, accounting for more than 90% of the coalbed methane resources in the province. The calorific value of coalbed methane is 2-2.5 times that of civil gas, and 3 cubic meters of civil gas can be produced per cubic meter of coalbed methane, and the comprehensive price is only 1 1% of that of gas, which is of great development and utilization value. Our province can learn from the successful experience of foreign countries and some provinces in southern China. In the process of coal mine production, extracting coalbed methane through technologies such as ground, mining area, goaf, grid drilling and roof drilling can form a new industrial chain, create benefits, save gas control costs, ensure coal mine safety production and improve the atmospheric environment.
Proved: In Shanxi coal-bearing strata, * * * is associated with high-alumina clay, hard clay, kaolinite, bauxite, pyrite and other minerals, which are rich in some areas and have development and utilization value.
Brief introduction of six coalfields in Shanxi Province
Datong coalfield: located in the north of Shanxi Province, between Xishishan and Kouquan fault, across Datong and Shuozhou. Datong coalfield contains coal-bearing strata of two eras, with Jurassic in the upper part and Carboniferous-Permian in the lower part. At present, Datong coalfield mainly produces Jurassic coal. Jurassic coal-bearing strata range: the north, west and south directions are all outcrops of coal seams, which are roughly distributed along Shangshenjian-Laoshan-Xiangyangzhai-Yangquan ditch; The eastern boundary is Qingciyao fault and coal seam outcrop line, covering an area of about 684 square kilometers. The area of Carboniferous-Permian coal-bearing strata is about 1739 square kilometers. The main mining areas built are Yungang mining area and Kouquan mining area.
Ningwu Coalfield: Located in the north-central part of Shanxi Province, between Luya Mountain (west) and Yunzhongshan Mountain (east), it spans four cities: Shuozhou, Xinzhou, Taiyuan and Lvliang. Ningwu coalfield also has carboniferous-Permian and Jurassic coal-bearing strata. Carboniferous-Permian coal-bearing strata range: the outcrop line of coal seam at the northern foot of Guandi Mountain in the south, roughly in the line from Houheishan to Liangjiazhuang; The outcrop line of coal seam from the northern slope to the southern slope of Hongtao Mountain is roughly in the area of Xiangyangbao-Chaoyangwan; The west boundary is Chunjingwa-Ximafang fault zone or coal seam outcrop line; The eastern boundary is Luyashan-Loufan fault zone or coal seam outcrop line, covering an area of about 7,678 square kilometers. The area of Jurassic coal-bearing strata is about 1200 square kilometers. The main mining areas built are: Pingshuo mining area, Xuangang mining area and Huabei Tun mining area.
Taiyuan Xishan Coalfield: Located in the middle of Shanxi Province, between Guandi Mountain and Jinzhong Rift Valley Basin, across Taiyuan and Lvliang. The west boundary is Baijiatan-Dongshe fault zone and coal seam outcrop line, the east boundary is Jinci fault, the north boundary is coal seam outcrop line, and the south boundary is extremely narrow, bounded by an east-west fault, with an area of about 1.855 square kilometers. The main mining areas built are: Xishan mining area, Gujiao mining area, Qingjiao mining area and Xingjiashe mining area.
Qinshui Coalfield: It is located in the southeast of Shanxi Province, between Taihang Mountain and Taiyue Mountain, with Zhoushan Mountain in the north and Wuwangshan Mountain in the south, covering six cities: Linfen, Jincheng, Changzhi, Jinzhong, Yangquan and Taiyuan. It is bounded on the north, east and south by the coal seam outcrop line, on the southwest by the Fushan fault and the southwest boundary of Huodong coal exploration District, adjacent to Huoxi coalfield, on the west by the coal seam outcrop line, on the northwest by Mianshan fault and Dongshan fault, adjacent to Jinzhong rift basin, and on the Fen (Yang) fault adjacent to Huoxi coalfield, with an area of about 365,438+0,738 square kilometers. The main mining areas are Dongshan mining area, Yangquan mining area, Shouyang mining area, Heshun mining area, Xiangyuan mining area, Lu 'an mining area, Changzhi mining area, Gaoping mining area, Jincheng mining area and Huodong mining area.
Huoxi coalfield: located in the south-central part of Shandong Province. Fenhe River Basin is located between Liangshan Mountain Range and Taiyue Mountain Range, and its banks span Yuncheng, Linfen, Jinzhong and Lvliang. It is bounded by coal seam outcrop lines and faults in Fenyang area in the north, adjacent to Jinzhong rift basin and Qinshui coalfield in the northeast by Fenyang-Jiexiu fault, bounded by coal seam outcrop lines in Quwo area in the south, bounded by coal seam outcrop lines and Heilongguan fault in the east of Luliang Mountain, bounded by coal seam outcrop lines and Huoshan fault in the west slope of Huoshan Mountain in the east, and adjacent to Qinshui coalfield in the southwest by Fushan fault and Huodong coal exploration area, with an area of about. The main mining areas are Fenxi mining area, Huozhou mining area and Lingshi mining area.
Hedong Coalfield: It is located in the west of Shanxi Province, west of Lvliang Mountains, and spans Yuncheng, Linfen, Lvliang and Xinzhou. Hedong Coalfield starts from Pianguan in the north, reaches Hejin in the south, is bounded by the Yellow River in the west, with coal seam outcrop lines in the north and south, and Lishi fault zone and coal seam outcrop lines in the east. The length from north to south is about 450km, the width from east to west is 10-40km, and the area is 17000km2.