论文部分内容阅读
为完善冲击地压灾害的预测判据,采用试验方法研究不同岩煤高度比条件下组合煤岩体冲击倾向性、破坏特征以及破坏过程中电荷感应规律。结果表明,随岩煤高度比的增大,组合煤岩试样的冲击倾向性由弱变强;破坏特征由煤体部分破坏型向煤岩整体破坏型和煤体-底板破坏型过渡;试样冲击倾向性越强,其峰后电荷脉冲数和电荷积累总量越小。可将应力峰后电荷脉冲数和电荷积累总量作为组合煤岩体冲击倾向性及破坏特征的初步判定依据。
In order to improve the predicting criterion of rock burst, the test method was used to study the impact propensity and damage characteristics of the coal and rock mass under different ratios of coal to coal rock mass ratio and the charge induction rules in the process of failure. The results show that as the rock height ratio increases, the impact propensity of the composite coal rock samples changes from weak to strong; the damage characteristics change from the partial coal type to the coal type and the coal type; The stronger the impact-like tendency is, the smaller the number of post-peak charge pulses and the total charge accumulation. The number of charge pulses after charge peak and the total amount of charge accumulation can be used as the preliminary judgment basis for the impact propensity and failure characteristics of the coal and rock masses.