Prevention method of shallow-buried steeply-inclined coal seam rock burst

Abstract

The invention relates to a prevention method of shallow-buried steeply-inclined coal seam rock burst. The prevention method includes following steps: (A) drilling a hole from ground to pre-splitting blasting a terrane or a rock pillar in floor and roof of a coal seam; (B) performing water-injection softening and pressure-releasing blasting to a mined coal seam; (C) after the coal seam being mined, performing deep-hole blasting to the floor and roof of the coal seam so that a hanging arch of the floor and roof is cut in advance and accumulated bending elasticity energy is released; and (D) filling a goaf of a working face with nonflammable objects after the coal seam being mined. In the prevention method, energy of the floor and roof are released through various measurements so that a strong rock burst disaster caused by fractured terrane or the rock pillar in the floor and roof can be prevented well. The method can effectively reduce an apparent intensity of a dynamic disaster during a mining process of a shallow-buried steeply-inclined coal seam and can reduced property loss and danger of worker life.

Description

technical field [0001] The invention relates to a method for preventing and controlling rock burst in shallowly buried steeply inclined coal seams, and belongs to the technical field of preventing and controlling rock burst in coal mine mining. Background technique [0002] In recent years, with the increasing depth of coal mining in my country, the problem of rock burst in many mining areas has become more and more serious. The pressure in the coal and rock mass exceeds the strength limit of the coal and rock mass, and the energy accumulated in the coal and rock mass around the roadway or stope is released suddenly, and an explosive accident occurs in the roadway, and the power throws the coal rock to the roadway, making a violent sound It is a kind of mine earthquake induced by mining, and it is also a kind of disaster. It not only causes damage to shafts, casualties, and damage to ground buildings, but also causes gas, coal dust explosions and floods, interferes with the ...

AI Technical Summary

Problems solved by technology

At present, there are many prevention and control methods for deep rockburst including steeply inclined coal seam rockburst, but for such figure 1 The steeply inclined shallow coal seams with a dip angle of 45° to 90° shown have no effective control measures. For example, there are steeply inclined shallow coal seams with certain reserves in western my country, especially in Xinjiang mining areas. After the coal seam is mined, there will be large In the gob area, due to the shallow burial and large inclination angle, the natural force received by the roof and floor is not enough to cause it to collapse, and the rock formation or rock pillar will fracture and become unstable. After the fracture, strong vibration will spread and induce adjacent coal seams. Accidents caused by rock bursts

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