Method for judging deep slant shaft stope impact risk by large-window damage method

Abstract

The invention discloses a method for judging the deep slant shaft stope impact risk by a large-window damage method. The method comprises the following steps: 1, observing and analyzing crustal stress, namely observing a crustal stress field according to the specific position of the stope, geological mining conditions and mining background, observing the area of the crustal stress field, and judging the impact risk of the deep oblique axis stope by a large-window destruction method, wherein the damage trace of the ground stress to the roadway is researched and judged on site to serve as the basis of impact danger prediction; 2, adopting a man-made large window intervention technology: arranging an observation roadway along the vertical direction of the principal stress direction accordingto the observation result of the crustal stress field aiming at the deep oblique axis stope, erecting a wood support column with a weak section on a vertical top plate and a vertical bottom plate in the roadway, and installing an angle gauge on the wood support column; and 3, judging the impact risk by abrupt change of displacement (angle) in the window: continuously observing the angle change condition of the goniometer, and taking the angle change condition as the impact risk early warning when multiple goniometer angle abrupt changes occur.

Description

technical field [0001] The invention belongs to the technical field of coal mining, in particular to a method for judging the impact risk of a stope at a deep syncline axis using a large window destruction method. Background technique [0002] Rock burst is one of the most serious disasters in my country's coal mines. The geological conditions of deep mines in my country are complex and changeable, and the possibility of rock burst is increasing. Factors affecting rockburst include structure, burial depth, roof, coal seam hardness, mining factors, etc. Among them, syncline structures, especially the deep syncline axis region, cause rockburst to be particularly serious, and are likely to be coupled with roof movement ACCIDENT. How to solve deep structural rock burst is a major technical problem faced by coal mines. Under such conditions, conventional measures such as improved roadway layout, coal seam water injection, strong support, coal seam pressure relief, broken top, ...

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