Prevention and treatment method for full-mechanized caving mining collapse trap area water disaster for shallow-buried ultra-thick coal seam

Abstract

The invention discloses a prevention and treatment method for full-mechanized caving mining collapse trap area water disaster for a shallow-buried ultra-thick coal seam, and solves the problem that an especially reasonable and optimal prevention and treatment method is lacked for the prevention and treatment of the mining collapses trap area of the shallow-buried ultra-thick coal seam. A 37 lime earth filling compaction-loess backfilling method is adopted to treat a crack group in the collapses trap area to prevent surface water from infiltrating into an underground working face; a trap bottom surface of the collapses trap area is in a slope design; an HDPE (high-density polyethylene) membrane and a natural pebble bed are used for seepage-prevention and river-diversion processing, backfilling, earthing, and planting herbal vegetation; a side slope of the collapses trap area is provided with a drainage channel so as to prevent a great quantity of rainfall from infiltrating into the underground working face in one time; two roadways of the underground working face are respectively provided with a water-proof valve to separate a mine from a goaf; and the mine safety is guaranteed. The method disclosed by the invention has the advantages of reasonable parameter, low construction cost, good prevention and treatment effect, strong adaptability, good safety and the like, and is especially suitable for the prevention and treatment method for full-mechanized caving mining collapse trap area water disaster for the shallow-buried ultra-thick coal seam.

Description

technical field [0001] The invention relates to the technical field of coal mine safety control, in particular to a method for preventing and controlling water hazards in subsidence pit areas of fully mechanized caving mining in shallow buried huge thick coal seams. Background technique [0002] Underground mining of coal mines often leads to large-scale subsidence of the surface. According to statistics, the accumulated land subsidence of coal mining in my country has reached 110×10 4 hm 2 , The accumulated economic losses have exceeded 50 billion yuan. If the land subsidence by coal mining is 0.2-0.3 hm 2 / 10 4 t estimates that the annual new subsidence area in the country is about (2.7-4.1)×10 4 hm 2 . Mining subsidence will not only lead to serious soil degradation and make the land uncultivable. At the same time, long-term large-scale mining of coal seams will lead to the continuous expansion of the area of ​​the goaf. The water has been directly connected, ...

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Problems solved by technology

[0004] The present invention aims to solve the problem that there is still a lack of a particularly reasonable and optimized prevention and control method for the water damage prevention and control of the subsidence area in the mining of shallow buried and extremely thick coal seams, and provides a method for preventing and controlling water damage in the subsidence pit area of ​​fully mechanized caving mining in shallow buried and extremely thick coal seams

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