Impact risk evaluation method based on roof rock stratum structure

Abstract

The invention discloses an impact risk evaluation method based on a roof rock stratum structure. The method comprises the following steps of: firstly, determining an impact risk evaluation object and a regional range, then collecting geological and mining related information in an impact risk evaluation region, then performing grid division on a to-be-evaluated region based on the collected geological and mining information, calculating roof thickness characteristic parameter values of geological drill holes, and determining the roof thickness characteristic parameter values of all grid nodes; finally, performing interpolation processing on the roof thickness characteristic parameter values of the to-be-evaluated region; and determining impact risk levels corresponding to different roof thickness characteristic parameter values. According to the impact risk evaluation method based on the roof rock stratum structure, all geological drill hole characteristics in the to-be-evaluated region can be fully utilized, more reasonable and accurate evaluation of roof rock stratum structure characteristics is achieved, the limitation and singleness of manual selection of geological drill holes are avoided, and the evaluation result is closer to the actual field condition.

Description

technical field [0001] The invention relates to the technical field of coal-rock dynamic disaster prevention and control, in particular to an impact risk assessment method based on roof rock structure, which is suitable for impact risk assessment of coal seams, mining areas, and working faces in mines. Background technique [0002] Rockburst is a typical mine dynamic phenomenon, which is extremely destructive and poses a great threat to mine production safety and employee life safety. With the increase of mine mining depth and intensity, rockburst disasters Dramatic increase. [0003] Therefore, accurate and effective impact risk evaluation results are of great significance to prevent the occurrence of rock burst disasters. First, it is necessary to analyze the inducing factors of the impact risk, evaluate the impact risk of the mining area, and obtain the impact risk area through the evaluation results. and hazard levels, thereby guiding the formulation of impact hazard zo...

AI Technical Summary

Problems solved by technology

[0004] The structure of the roof strata above the coal seam has an important influence on the occurrence of rock burst, and the evaluation of the structural characteristics of the roof strata is an important part of the impact risk assessment; the existing evaluation methods for the roof strata structure mostly use the thickness characteristic parameter value Lst of the roof strata Evaluate the impact risk of rock formations, but the traditional calculation method considers a single factor, is greatly affected by human factors, and has certain limitations in the application of mines under different conditions

For example, in the traditional calculation method, it is unreasonable to determine the ratio of the decline coefficient of the weak plane of the rock formation only based on the lithology. Under different mine geological conditions, the properties of the same lithology roof rock formation may be quite different

In addition, for the impact risk assessment in a large area, the selection of representative geological boreholes determines the impact risk assessment results, and the selection of geological boreholes is mainly artificially selected, which is greatly affected by human factors, resulting in unreasonable assessment results

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