One-hole multi-purpose construction method for controlling impact and gas disaster of deeply buried coal seam.

Abstract

The invention discloses a one-hole multi-purpose construction method for controlling the impact and gas disaster of deeply buried coal seam. The one-hole multi-purpose construction method includes thefollowing steps that a drilling distance is determined; drilling construction is carried out; a actual stress concentration zone is determined; drilling plugging and gas drainage are carried out; sufficient pressure relief of the coal seam is carried out; and high pressure water injection is carried out. Preferably, the plugging is the first plugging using the expanded capsule, and after the coalseam is fully depressurized, the second complete drilling plugging is performed with sealing agent. According to the one-hole multi-purpose construction method for controlling the impact and gas disaster of deeply buried coal seam, the simultaneous treatment of the deep ground coal seam impact ground pressure and gas disaster can be realized, and the process steps of reasonablely determining thedrilling spacing and the drilling length, the working face drilling pressure relief, the two drilling sealing, the gas drainage, the water injection and the like are adopted, the purpose of multi-purpose, cost reduction and efficiency enhancement are efficiently achieved. The one-hole multi-purpose construction method is simple, easy to operate, can fully utilize the multiple functions of the drilling, and avoids the existing repetitive and wasteful of drilling construction of the existing technology.

Description

technical field [0001] The invention relates to the technical field of coal mine construction, in particular to a construction method with one hole and multiple functions for controlling impact and gas disasters in deep coal seams. Background technique [0002] Due to continuous large-scale coal mining, shallow coal resources in most mining areas in my country are gradually decreasing, and deep mining will become the new normal of the future coal industry. The gas content and in-situ stress in deep coal seams are gradually increasing, and the mining conditions are harsh. The threat of rock burst and gas disasters is increasing, which seriously affects the safe production of mines. [0003] A lot of research has been done on rock burst control and gas disaster control both at home and abroad, and a variety of measures to control rock burst by reducing the energy stored in coal seams have been proposed, such as coal seam water injection, large-diameter drilling pressure relief...

AI Technical Summary

Problems solved by technology

The technical problem to be solved by the present invention is to overcome the problems in the prior art such as unreasonable spacing between anti-scouring boreholes, gas drainage boreholes and water injection boreholes, repeated boreholes, low utilization rate of boreholes, and inefficient disaster management.

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