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为了研究冲击矿压发生时岩巷围岩介质中冲击震动波传播衰减规律以及巷道围岩响应特征,以传播效应分析模型为基础,采用FLAC3D模拟软件建立数值模型,在模型内部加载冲击震源动力条件,并分别在指定位置布设冲击震动波监测点,利用Dynamic动力分析模块进行模拟运算,运用MATLAB软件对各测点采集的冲击震动波信号进行频谱特性分析,进而研究岩巷围岩介质中冲击震动波传播效应。研究结果表明:(1)冲击震动波能量沿巷道走向与震源的距离呈幂关系衰减,短距离内震动波能量衰减很快,达到一定距离后能量衰减不明显。(2)顶板监测到的冲击震动波能量最大,肩窝受到的震动影响次之,帮部和底板区位受到的震动影响相对最小。这些结论为进一步研究冲击矿压发生过程中冲击震动波传播规律以及对煤矿巷道的损伤破坏特点提供理论基础。
In order to study the attenuation law of shock wave in rock mass surrounding rock and the response characteristics of surrounding rock in rock mass surrounding rock mass, based on the propagation effect analysis model, FLAC3D simulation software was used to establish the numerical model, and the dynamic conditions of shock source were loaded , Respectively, in the designated location of the shock wave monitoring point deployment, the use of Dynamic Power Analysis module for simulation, the use of MATLAB software for each point of the acquisition of the shock wave signal spectrum characteristics of analysis, and then study rock surrounding rock medium shock and vibration Wave propagation effect. The results show that: (1) The energy of impact vibration wave decays exponentially with the distance from the source along the direction of the roadway, and the energy of the vibration wave attenuates rapidly within a short distance. The energy attenuation is not obvious after reaching a certain distance. (2) The impact energy of the impact wave detected by the roof is the largest, the vibration of the shoulder is affected by the vibration, and the impact of the vibration of the roof and the roof is relatively minimum. These conclusions provide the theoretical basis for further study of the rule of shock and vibration wave propagation during the occurrence of rock burst and the damage characteristics of coal mine roadway.