Method for evaluating mining influence degree between same-mining working faces of adjacent mining area

Abstract

The invention discloses a method for evaluating the mining influence degree between the same-mining working faces of an adjacent mining area. The method comprises the steps that a plurality of mine earthquake signals generated in the process that the two working faces are subjected to stoping at the same time are collected through an existing underground mine microseismic monitoring system, the positions and energy of all mine earthquake sources are calculated through a known method, then a mine earthquake data advanced statistical area is determined, the mine earthquake data advanced statistical area is equally divided, a plurality of tendency partitions are obtained, and the total mine earthquake energy and the total mine earthquake frequency in all the tendency partitions are counted; and a total mine earthquake energy and total frequency change curve of the tendency partitions is drawn, then the two curves are normalized, coal pillar areas are marked on the normalized total mine earthquake energy and total frequency change curve, a total mine earthquake energy relative value and a total frequency relative value are determined in the coal pillar areas, finally the two values arejudged according to the standard, and the mining influence degree between the same-mining working faces is obtained. Additional monitoring devices are not arranged, and the evaluation accuracy is guaranteed.

Description

technical field [0001] The invention relates to an evaluation method for the influence degree of mining between working faces in adjacent mining areas, and belongs to the technical field of coal mine safety. Background technique [0002] With the depletion of shallow coal resources, most of the mines are transferred to deep mining, which leads to the continuous deterioration of the stress environment in the stope, frequent occurrence of dynamic disasters such as rock bursts, and seriously threatens the safe production of mines and the safety of personnel. The occurrence of dynamic disasters such as rock burst is the result of the joint action of the static load of the surrounding rock in the stope and the dynamic load such as roof fracture. After the working face is mined, under the action of the supporting pressure, a certain range of stress concentration areas will be formed in the surrounding coal and rock mass. If the distance between two adjacent working faces is relati...

AI Technical Summary

Problems solved by technology

However, there is no method for evaluating the degree of impact of mining between the same mining face in the adjacent mining (panel) area by using the microseismic monitoring system.

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