Prediction of coal-gas outburst induced by rock-burst tendency based on AHP-TOPSIS

doi:10.16265/j.cnki.issn1003-3033.2020.04.008

Abstract

Abstract: In order to evaluate coal-gas outburst induced by rock burst more reasonably, grading criteria of coal-gas outburst indicators were studied from three aspects of in-situ stress conditions, coal seam gas, and physical and mechanical properties of coal by using index critical value and classification number method. Then, a grading evaluation model of outburst tendency was established based on AHP and TOPSIS. Finally, its rationality was verified through actual engineering cases. The study show that the prediction result of proposed model is medium risk, consistent with actual cases. In-situ stress is a major reason for occurrence of rock bursting with coal-gas, followed by gas factor and physical and mechanical properties of coal have the least impact. Specifically, coal structure, gas pressure, gas dynamic phenomenon, coal damage type and coal solidity coefficient have a greater impact on such outburst.

Key words: coal, coal-gas outburst induced by rock burst, analytic hierarchy process (AHP), technique for order preference by similarity to ideal solution (TOPSIS), influencing factors

CLC Number:

X936

CHEN Liuyu, LI Xijian, BI Juan, HUA Youjin, WEI Zeyun. Prediction of coal-gas outburst induced by rock-burst tendency based on AHP-TOPSIS[J]. China Safety Science Journal, 2020, 30(4): 47-52.

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