Improved catastrophe progression method for evaluating supporting effect of bolts in mining roadway

doi:10.16265/j.cnki.issn1003-3033.2021.03.009

Abstract

Abstract: In order to determine comprehensively bolt support effect of mining roadway under influence of various factors,an improved catastrophe progression method was proposed to evaluate supporting effect of bolts in mining roadway. Firstly, based on multi-layer decomposition of factors affecting roadway bolt support effect, index importance ranking problem in catastrophe progression method was improved by dispersion maximization method. Then, evaluation model of bolt support effect based on improved mutation progression method was constructed, and evaluation series of roadway bolt support effect was calculated. Finally, feasibility and reliability of model were confirmed by evaluating effect of roadway bolt support on 20 samples and verifying by numerical simulation. The results show that improved catastrophe progression method considers relative importance of each index. Evaluation results are accurate, which provides a new method for evaluation of bolt support effect.

Key words: mining roadway, bolt support, catastrophe progression method, roadway stability, maximizing deviation method

CLC Number:

X936

LI Jing, HU Bin, LIU Yanzhang, CUI A'neng. Improved catastrophe progression method for evaluating supporting effect of bolts in mining roadway[J]. China Safety Science Journal, 2021, 31(3): 60-65.

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