Key influencing factors and determination method of importance degree for expansion of gas-bearing coal and rock mass

Abstract

In order to avoid too many invalid factors that cannot be eliminated and affect the reasonable distribution of the weights of key influencing factors, the present invention provides a test-based analysis method for analyzing key influencing factors of gas-containing coal and rock mass expansion in mining disturbance working faces, including: determining mining Disturb the factors affecting the capacity expansion of gas-containing coal and rock mass in the working face, compare the key influencing factors to determine the judgment matrix, and use the normalization method to establish the weight set of the key influencing factors of capacity expansion, and further analyze the key factors. Influencing factor weights are verified for consistency. The method of the present invention has wide practicability, avoids subjective setting of key influencing factor indicators, and analyzes expansion characteristics and expert judgment standard values ​​through laboratory tests according to on-site observation experiments, so that the analysis results are scientific, objective, safe and reliable.

Description

Technical field [0001] The invention belongs to the field of prevention and control of deep mining disasters in coal mines, and more specifically, relates to a test-based method for determining key influencing factors and importance of the expansion of gas-containing coal and rock mass in a mining disturbance face. Background technique [0002] The expansion of gas-bearing coal and rock mass in mining disturbance working face is the phenomenon of volumetric nonlinear expansion and deformation of gas-bearing coal and rock mass under mining action. The expansion of gas-bearing coal and rock mass in the working face can easily induce coal and gas outburst accidents, which has a serious impact on safety production. [0003] With the increase of mining depth, the expansion of gas-bearing coal and rock mass in the working face will induce more and more serious coal and gas outburst accidents. Therefore, to control the expansion of gas-bearing coal and rock mass, the key to the expansion ...

AI Technical Summary

Problems solved by technology

[0008] On the issue of weight distribution, different analysts often have different views on the same issue, which is very arbitrary and subjective, and the importance ranking of the analysis index system lacks objectivity and fairness

Images