针对深部煤层冲击倾向指标评价冲击危险出现的差异现象,开展了煤、岩石和组合试样冲击倾向指标试验研究,对组合煤岩试样破裂过程的电荷信号进行监测。试验结果表明:顶、底板岩石对煤体的冲击倾向有显著影响,岩石厚度越大,冲击倾向指标越高;组合试样破裂过程的力-电荷变化具有一致性,冲击倾向性强的组合试样,其应力强化直至破坏阶段的电荷信号幅值相差显著。由此提出了组合煤岩峰后电荷变化率冲击倾向判据。回采面的电荷监测表明,冲击危险发生过程获得的电荷变异系数迅速升高和衰减以及试验获取的峰后电荷变化率的量化分析结果相一致,从而验证了峰后电荷变化率作为冲击倾向判据的正确性,为形成深部开采条件下组合煤岩冲击危险及发生几率的电荷预测方法提供了试验指导,为煤岩体失稳破坏预测、矿井动力显现预警提供了试验依据。 According to the difference of the impact danger of deep coal seam impact propensity index, the impact propensity index test of coal, rock and composite sample was carried out to monitor the charge signal during the rupture process. The test results show that: the top and bottom rock have a significant impact on the impact of the impact of the coal body, the greater the rock thickness, the higher the impact of the indicators; the combination of specimen rupture process of charge - charge changes consistent with the impact of strong combination test In the same way, the magnitude of the charge signal of the stress-enhanced until failure phase is significantly different. Based on this, the criterion of impact tendency of charge change rate after combination of coal and rock is proposed. Charge monitoring in the recovery area showed that the charge-induced variation coefficient obtained during the impact hazard was consistent with the decay and the quantitative analysis of the post-peak charge change obtained from the test, thus verifying the post-peak charge change rate as the criterion of impact propensity Which provided the experimental guidance for the formation of the charge prediction method of combined rock and coal rock burst risk and occurrence probability under deep mining conditions and provided the experimental basis for the prediction of coal and rock mass instability and early warning of mine power.