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

In order to evaluate coal ̄gas outburst induced by rock burst more reasonablyꎬ grading criteria of coal ̄gas outburst indicators were studied from three aspects of in ̄situ stress conditionsꎬ coal seam gasꎬ and physical and mechanical properties of coal by using index critical value and classification number method. Thenꎬ a grading evaluation model of outburst tendency was established based on AHP and TOPSIS. Finallyꎬ its rationality was verified through actual engineering cases. The study show that the 中 国 安 全 科 学 学 报 China Safety Science Journal 第30卷 2020年 prediction result of proposed model is medium riskꎬ consistent with actual cases. In ̄situ stress is a major reason for occurrence of rock bursting with coal ̄gasꎬ followed by gas factor and physical and mechanical properties of coal have the least impact. Specificallyꎬ coal structureꎬ gas pressureꎬ gas dynamic phenomenonꎬ coal damage type and coal solidity coefficient have a greater impact on such outburst.