Study On The Feasibility Of Mining 1026 Working Face Under The Aquifer Of Wugou Coal

The Wugou coalfield which located in Wugou town,Huaibei City,AnHui Province is concealed coalfield,The main coal seam in the mining area which located in the western of this coalfield is 10 coal.Based on the thickness of mining,when the mine is preliminary designed,the mining area of the West Wing of one mining area is designed at the upper limit of-340m,and more than 3,700,000 tons of coal is pressed.However,it caused severe resources loss and economic losses,which led to intense questioning by others.So,it's necessary to launch the research for decreasing the waterproof coal pillar in the 1026 inner working face under the aquifer.This thesis takes Wu Gou coalfield 1026 working area as main objective,systematically analyzes the tunnel arrangement system,mining method,main coal seam overburden structure characteristics,rock hardness degree and damage range,degree of surface movement and deformation.According to the exploration and construction of hydrological data,cooperated with the geological conditions of second mining area,it has been set one before mining and hydrological exploration hole sampling,it's 1026-1 and its rock mechanics and water-physical property has been tested.The result showed that top rock formation of mining coal in 1026 working face is weak-medium hard stratum,which is against fracture development and has better water blocking capability,and according to the water-physical property test,the regenerating water blocking capability is better in the bedrock weathering zone.On the other hand,by adopting FLAC^3D software simulation,the surrounding rock's mining pressure diversification and displacement diversification will increase when the goaf range,mining surface widththe width and the advancement speed increase.These parameters in the middle of working area is larger than its in the top,it means setting water barrier should on the basis of the damage range of the middle of working area?According to the computer simulation,the water barrier is 29.1m;according to Coal mining specification with different face advance distance,the water barrier is24.78m;According to analogy method,the water barrier is 30.76m.After comprehensive consideration,the reducing waterproof coal pillar mining is feasible?At last,by comparing with adjacent mining coalfield,it can be concluded that on the basis of flood preventing,cooperating with the successful experiences of other allied working area,1026 working area can be safe explored...