【摘要】 利用FLAC3D数值模拟软件的Dynamic模块,将井下实测的一次冲击矿压信号作为震源,模拟研究了冲击震动波在不同煤岩介质中的传播特性,取得了如下主要结论:①震动波在煤岩层中的衰减与传播距离呈乘幂关系,且垂直方向的衰减指数要大于水平方向的衰减指数。②弱岩层结构对震动波的传播起到了很好的能量衰减作用,岩性越弱,厚度越大,震动波的衰减越显著。③弱岩层结构距离巷道顶板越近,对震动波的衰减效果越明显。此外,通过现场工程实践验证了震动波在弱岩层结构中传播的衰减效应。更多还原

【Abstract】 Based on the dynamic module of FLAC3D numerical simulation software,and using the rockburst shock wave signal measured in filed as the source,the propagation characters of shock wave in different coal and rock medium was simulated and the achieved results are as follows:① the attenuation of shock wave propagation in coal and rock strata has a power relation with distance,and the vertical-directional attenuation index is greater than it of horizontal direction.② The weak rock structure plays a positive role for the energy attenuation of shock wave propagating.The weaker the lithology is,and the thicker the weak rock thickness is,the shock wave attenuation will be more significant.③ The closer the weak structure distances from the roadway roof,the more significant the attenuation effect of shock wave is.In addition,the attenuation effect of shock wave propagating in the weak rock structure is validated through on-site engineering practice.These conclusions provide certain theoretical basis for preventing the impact fracture of roadway from shock wave.更多还原