Coal mine large-mining-depth and next-group coal exploitation water control comprehensive treatment method

Abstract

The invention relates to a coal mine large-mining-depth and next-group coal exploitation water control comprehensive treatment method. The method comprises the following steps: (1) overall-region advancing comprehensive grouting plugging treatment, namely a, ground geophysical prospecting, and b, ground exploration and advancing comprehensive grouting treatment in an overall region; (2) strip advancing grouting treatment before downhole tunneling; (3) grouting reinforcement in a mining region and advancing grouting treatment of an adjacent unmined region, namely guiding comprehensive grouting reconstruction of a seam floor by use of more than two types of geophysical prospecting in a mining surface after a stope face is dug out; (4) stoping. According to method, an existing local multipoint one-surface single treatment is replaced by an overall-region advancing water control comprehensive treatment method for a hydrogeololgy unit or mining region and a staged horizontal region unit which are relatively independently partitioned by a geologic structure, so that water burst of a mine is prevented, an obvious effect of protecting groundwater environments, water resources and other aspects is achieved, the large-mining-depth and next-group coal mine exploration safety guarantee extent can be greatly improved, and obvious environmental and social benefits are obtained.

Description

technical field [0001] The invention relates to a method for comprehensive treatment of water prevention and control in large mining depth and lower group coal mining in coal mines, belonging to the technical field of water prevention in coal mines. Background technique [0002] Over the past few decades, the shallow coal resources in the central and eastern mining areas of my country have been nearly exhausted due to long-term mining. The mining depth of 47 pairs of mines reached more than 1000m. Deep mines and lower coal mines are threatened by water inrush from high pressure floors, which poses a serious hazard to coal mine safety. In addition, the Austrian ash aquifer is an important source of water for industry, agriculture and domestic use. Mine water inrush will inevitably bring about large disturbance and damage to the underground ecological environment, seriously affecting the groundwater environment and water supply in the mining area and surrounding areas. Theref...

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Problems solved by technology

[0014] ② In the past, the focus of exploration and treatment was limited to the coal seam floor water-resisting layer, not the Austrian ash strong confined aquifer. Limited by the current exploration and treatment technology and means, large water inrush accidents cannot be completely avoided

[0015] ③ There are safety threats in underground drilling construction. It is very difficult to conduct safe construction of high-pressure or ultra-high-pressure drilling, and it is difficult to control the occurrence of water discharge

[0016] ④ The original "one side one treatment" method of mine water prevention and control is a method of treatment later, which has problems such as difficulty in controlling water inrush and low production efficiency

[0017] ⑤ It is suitable for small-scale mining, but cannot meet the connection requirements of large-scale mining

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