10~# Coal Bed Developmental Mechanism And Workability Research In Tongchuan Mining Area

Tongchuan mine area is the earliest coal bases in Shanxi Province. The main coal mining beds belongs to the Permian-Carboniferous coal-bearing rocks. The 5# coal bed is small burial depth and mining conditions is relatively simple, so it is the main coal bed. With the extension of mining, 5# coal resources is fewer and fewer. With the developments of mining technology, some of coal beds that are difficult to mining before have been put on the agenda. Whether mine 10# coal bed is directly related to Tongchuan coal mine's economic interests and length of service.The paper mainly discussed the development rules and recoverability of 10# coal bed in Tongchuan. The key contents include: the formation conditions of 10# coal bed such as coal-forming plants, palaeoclimate, paleogeography and paleostructure; the influences of late reformations on 10# coal bed's development; the development rules; the coal quality and reserve of 10# coal bed. Finally, the technology conditions, economic benefits, environmental impactions were evaluated to decide whether exploit 10# coal bed or not.Base on the study, it concluded that 10# coal bed accumulated in coastal delta plain during the middle stage of the Late Carboniferous. The coal bed tendency is NNW347°, and the roof is smooth. The thickness of coal bed is mainly determined by sedimentation, and it is bigger in west of Tongchuan relatively. The results of coal quality study show that the ash content is middle, the phosphorus content is low, the sulfur content is high and the volatile content is low. According to DZ/T0215-2002, 10# coal bed can be exploited in Wangshiwa Coal Mine, but the desulfurization should be carried on first. Meanwhile, according to GB/T 17766-1999, the proved extractable reserve is 43.398 million tons.The mine hydrogeology, mine water filling factor, coal seam roof and floor, gas, coal dust and ground temperature were study as well, and the results indicate that the technology conditions can be satisfied. The estimation of sales profit show that economic benefits can be guaranteed about exploiting 10# coal bed. Some measures were proposed to prevent the pollutions of groundwater. In a word, 10# coal bed can be exploited.