Closing-blocking-draining combined water prevention and control method for Maokou limestone underground grouting and closure

A Maokou limestone, water control technology, applied in drainage, earthwork drilling, safety devices, etc., can solve the problem of not considering the drainage of groundwater, etc., achieve the effect of reducing drainage head, reducing funnel area, and saving electricity costs

Active Publication Date: 2015-05-13
湖南楚湘建设工程集团有限公司
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Problems solved by technology

The existing downhole grouting technology for water blocking and flow closure is mainly aimed at the Ordovician limestone in the north

Method used

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  • Closing-blocking-draining combined water prevention and control method for Maokou limestone underground grouting and closure
  • Closing-blocking-draining combined water prevention and control method for Maokou limestone underground grouting and closure
  • Closing-blocking-draining combined water prevention and control method for Maokou limestone underground grouting and closure

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Embodiment

[0036] The coal dam mining area under the jurisdiction of Hunan Black Gold Times Changsha Mining Co., Ltd. is a nationally famous Dashui mining area. There are currently three pairs of mines in Wumuchong, Xifenglun, and Zhushantang. The mining area has a moderate geological structure and extremely complicated hydrogeological conditions. With the continuous development and deepening of the mine, the drainage funnel in the mining area has been continuously expanded, and the drainage area has now reached 368km 2 . It has entered the later stage of deep mining, and the production cost remains high. The task of waterproofing and maintaining the well is arduous and the pressure is huge. Only through surface water control, closing some underground mining areas with high energy consumption, safe power supply and drainage conditions, can we fully achieve intrinsic safety and high efficiency. Mining area, revive the mining area. The implementation area of ​​the present invention is the...

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Abstract

The invention discloses a closing-blocking-draining combined water prevention and control method for Maokou limestone underground grouting and closure. The method includes the first step that an underground mining area which is high in energy consumption and poor in safety power supply and drainage condition is closed; the second step that the elevation range of a karst development vertical zoning area of Maokou limestone is determined; the third step that in an underlaying composite anticline bottom plate of the Maokou limestone in the closed mining area which is high in energy consumption and poor in safety power supply and drainage condition, a secondary anticlinal rise portion nearest to an underground water supply area is selected as an underground grouting design target area; the fourth step that the depth and orientation of underground grouting holes of the Maokou limestone are determined; the fifth step that underground water of the underground Maokou limestone is intercepted; the sixth step that the water is drained at a electricity price valley time period. The method can prevent the accident of water inrush, reduce the possibility of karst surface subsidence, and can save a great number of electricity costs and improve economic benefits.

Description

technical field [0001] The invention relates to a method for preventing and controlling water in coal mines, in particular to a method for preventing and controlling water by combining closing-blocking-draining through grouting and interception in underground Maokou limestone wells. Background technique [0002] The coalfields in southern my country belong to the Late Permian coalfields in South China, and most of the coal seam floors are Maokou limestone aquifers, and their hydrogeological conditions are often between extremely complex and moderate types. From 2001 to 2012, there were 179 water inrush accidents in coal mines across the country, with a death toll of 1,598, of which 96 occurred in southern coal mines, with 917 deaths, accounting for 53.6% and 57.4% respectively. Water inrush accidents cause heavy casualties, property losses and serious social and environmental problems. At present, the prevention and control of water hazards in Maokou limestone mines in ...

Claims

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Application Information

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IPC IPC(8): E21F16/00
CPCE21F16/00
Inventor 赵延林王卫军万文
Owner 湖南楚湘建设工程集团有限公司
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