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Coal mine impact ground pressure and harmful gas comprehensive prevention and treatment system and method

A harmful gas and rock burst technology, applied in drilling equipment and methods, mining fluids, mining equipment, etc., can solve the problems of rock burst accidents, lack of anti-scouring technology, etc., and achieve improved safety and simple equipment structure. Effect

Pending Publication Date: 2020-08-11
陕西省煤层气开发利用有限公司
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Problems solved by technology

[0003] Aiming at the technical problems existing in the prior art, the present invention provides a coal mine rockburst and harmful gas comprehensive prevention and control system and method to solve the problem that there is no anti-scouring technology for the pre-excavation area in the prior art, which may easily lead to Technical Problems Continuing to Occur in Rock Burst Accidents

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  • Coal mine impact ground pressure and harmful gas comprehensive prevention and treatment system and method
  • Coal mine impact ground pressure and harmful gas comprehensive prevention and treatment system and method
  • Coal mine impact ground pressure and harmful gas comprehensive prevention and treatment system and method

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Embodiment

[0046] Taking the 401103 coal seam mining face of a coal mine as an example, the 401103 coal seam mining face has a strong impact tendency, its roof has a weak impact tendency, and its bottom plate has no impact tendency. The roof is hard pebble-bearing sandstone.

[0047] Using the system and method for integrated prevention and control of rockburst and harmful gas in a coal mine described in the present invention, when the coal seam and the roof of the 401103 coal seam mining face of the coal mine are subjected to rockburst prevention and harmful gas extraction, the following steps are specifically included:

[0048] Integrating the roof lithology and pressure characteristics of the 401103 coal seam mining face, considering the feasibility of anti-scouring measures, based on mine hydrology, geological structure and rock mechanical properties, through the stress analysis and energy transfer form analysis of the coal seam and its roof and floor, Determine the target rock format...

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Abstract

The invention discloses a coal mine impact ground pressure and harmful gas comprehensive prevention and treatment system and method. Firstly, according to roof lithology and pressure characteristics of a coal mining work face, a target rock layer of horizontal well staged fracturing is determined, according to the target rock stratum and coal seam work face characteristics, a well spacing manner of a horizontal well is determined, the horizontal well is drilled, in the horizontal well, a target rock stratum and a coal seam are subjected to fracturing, through fracturing, the target rock stratum and the coal seam form an inter-communication net-shaped fracture, a ground pump drainage system is built, harmful gas in the coal seam is subjected to pump drainage, the horizontal well is mountedin the target rock stratum, in the horizontal well, the target rock stratum and the coal seam are subjected to fracturing, the inter-communication net-shaped fracture is formed in the target rock stratum and the coal seam, fracturing pressure relief of the target rock stratum is achieved, the stress state of a coal seam roof is changed, happening of an impact ground pressure accident is avoided, and meanwhile, release and pump drainage of harmful gas in the coal seam can be achieved.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and in particular relates to a coal mine rockburst and harmful gas comprehensive prevention and control system and method. Background technique [0002] As one of the main dynamic disasters faced by coal mining in deep mines, rock burst has become a worldwide problem to be solved urgently in the field of mining and rock mechanics. At present, the rock burst prevention and control technologies mainly include: large-diameter coal pillar drilling, deep hole blasting, coal seam water injection, and roof pre-cracking, etc. Uncertain pressure relief effect and other issues. At present, because there is no anti-scouring technology for the pre-excavation area, rock burst accidents during the mining process continue to occur; the existing regional anti-scouring is mainly to mine the liberated layer. At present, there is no effective means of regional erosion prevention. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21B43/26E21B7/04E21B7/06
CPCE21B7/046E21B7/06E21B43/26E21F7/00
Inventor 李来新王世斌徐建民赵富强陈龙陈小军许聪
Owner 陕西省煤层气开发利用有限公司
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