Research and Application of Water Hazard Governance Technology for Bottom Gravel Layer in Thin Bedrock Area of Coal Mine
The 7308 working face of Yunhe Coal Mine is close to the coal seam outcrop area.In order to solve the problem of water hazard threatened by the aquifer in the Quaternary bottom gravel-wind oxidation zone,a well up and down joint drilling method is adopted to explore the aquifer situation of areas that near the working face.The water richness and connectivity of the aquifer in the Quaternary bottom gravel-wind oxidation zone near the mining area are identified.The multi-purpose method of one hole is adopted,and targeted grouting reinforcement and sealing are carried out through the exploration drilling hole.The water supply source of the Quaternary bottom gravel-wind oxidation zone in the adjacent goaf is effectively sealed,the coal seam roof is reinforced,the water hazard threat during the stoping period of the working face is reduced,and the safety problem of coal mining under loose aquifers in the study area is solved.Water reduction mining is achieved,and the mine water inflow is reduced,which has important economic benefits and social benefits.
thin bedrock areabottom gravel-wind oxidation zone water layerjoint explorationgrouting governance
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