Juye Coal Mine is the coal mine with the largest reserves and the best coal quality developed in East China during the Tenth Five-Year Plan period. The total mining area is 12 10 square kilometer, and the total reserves are about 5.5 billion tons. Due to geological conditions, it is divided into Juye coalfield and Liangbaosi coalfield, with an area of 960 square kilometers and Liangbaosi coalfield of 250 square kilometers. In view of the development of underground faults, Juye coalfield is divided into five well areas (from south to north): Juye Feng Wan, Gulong, Yuncheng Zhaolou, Guotun and Yuncheng, and Liangbaosi coalfield is divided into two well areas (from west to east): Jiaxiang Pengzhuang and Liangbaosi. In these seven well areas, Yilong cementing area has the largest reserves, the best coal quality and the most development value.
On May 22, 2003, the feasibility study report on the development of Long Gujing was approved by the State Planning Commission, and Xinwen Mining Group and Juye Lulin Mining Company jointly carried out comprehensive development.
I. Overview
Geographical coordinates: east longitude115 45' ~116 07' 30 ",north latitude 35 02' 30" ~ 35 50', north-south length 80km, and east-west average width/kloc-. The main river systems are: Maoxin River in the north, Zhaowang River in the middle, Zhuzhaoxin River and Wanfu River in the south, all of which flow eastward into the Beijing-Hangzhou Canal and Nanyang Lake near the Yellow River. Yan (Zhou) New (Xiang) Railway and Yan (Zhou) Lan (Kao) Highway pass through the southeast, and Beijing-Kowloon Railway passes through the northwest edge of this area. Roads in this area extend in all directions. The traffic is very convenient. Power supply includes Jining Power Plant and Heze Power Plant. The water supply source and underground water source in the mining area are under exploration, and the water quality is poor. The local government is considering quoting the Yellow River water. This area belongs to temperate semi-humid monsoon region, with continental climate, with extreme maximum temperature of 44.5℃ and extreme minimum temperature of-18.7℃. Annual average temperature 13.5℃, annual average precipitation of 694.7mm, and annual average wind speed of 3.3m/s. ..
Geology:
(1) stratum
Middle and Lower Ordovician: generally about 800 meters thick, mainly limestone and dolomite limestone mixed with a small amount of calcareous mudstone.
Benxi formation of Middle Carboniferous: 5.2-35.35m thick, mainly composed of limestone mixed with mudstone, with occasional coal seam 1-2.
Taiyuan Formation of Upper Carboniferous: the thickness is140.51-174.5m, and it is composed of siltstone, fine sandstone and thin limestone. There are 22 thin coal seams and limestone 13 layers, of which 5 layers are recoverable and partially recoverable, and the main coal seams are mostly distributed in the middle of the coalfield.
Shanxi Formation of Lower Permian: about 65 meters thick, composed of sandstone, siltstone and coal seams, including No.2 and No.3 coal seams, and No.3 coal seam in the north, middle and south has been eroded to varying degrees.
Lower Permian Lower Shihezi Formation: about 55 meters thick, mainly composed of mudstone and siltstone.
Upper Permian Upper Shihezi Formation: The maximum residual thickness is 488.90m, which is mainly composed of mudstone, siltstone and medium-fine sandstone.
Upper Tertiary: the thickness is 272.50-596.30m, and it gradually thickens from north to south and from east to west. The main lithology is brown, grayish green clay, sandy and silty clay.
Quaternary: the thickness is 92-180.10m, and it is mainly composed of clayey sand and sandy clay.
(2) Structure: This area is a wide gentle syncline structure, with a general north-south trend, southeast inclination and a gentle dip angle of 5? — 15? It is slightly steep in the north, reaching 20 in some areas. To sum up, secondary folds and faults are well developed, with most secondary folds in the north-south direction and some in the north-north direction. There are mainly three groups of faults, mainly high-angle normal faults in north-south direction, followed by faults in north-east direction and east-west direction, and the structural complexity belongs to medium type.
(3) Magmatic rocks: The magmatic rocks in the coal field in the late Yanshanian belong to lamprophyre, with an isotopic age of 68.45-1228,600 years. From north to south, it intrudes into coal measures strata in the form of bedrock and dikes, making some coal seams become anthracite, natural coke or a mixture of magmatic rocks and natural coke.