Chaigou Coal Mine is a high-efficiency and high-yield coal mine with an annual output of 8 Mt.The 1503 working face planned to be mined has a buried depth of 200-255 m and the mining thickness of the coal seam exceeds 12 m.It is the working face of a typical giant thick coal seam under thin rock formation.The formed water-conducting fracture zone develops to the surface.The working face needs to pass under the seasonal river,Xiaonangou River,during the rainy season.In order to prevent the river flood from flowing into the well along the water-conducting fracture,resulting in a safety accident,through analysis of the surface topography and hydrogeology of the working face,the comprehensive water control plan of guiding pre-filling by rock movement observation,damming interception on the advanced position of the working face + diversion of the drainage hole"was adopted.The implementation of the scheme successfully realized the safe mining of the fully-mechanized caving face of giant thick coal seam under the seasonal river.
关键词
综采放顶煤/巨厚煤层/河道下采煤
Key words
fully-mechanized caving mining/giant thick coal seam/coal mining under river
维普
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