煤矿采空区地震波场的数值模拟研究

为了更好地对煤矿采空区进行预测，采用Tesseral-2D正演模拟软件及煤矿井下三维地震波数值模拟软件进行了采空区探测分析，根据软件自身的特性，对煤矿采空区进行了自激自收和单炮的正演模拟。研究得出:当地震波遇到采空区时，波形会出现折曲和不光滑，在采空区的正下方会遇到类似串珠状的波形；当采空区之间的距离小于10 m时，采空区之间的串珠状的波形会相互干扰，致使波形模糊不清楚；由于煤层中巷道的存在，使得煤层底板的反射很弱的波形，具体特征为经采空区顶板反射后的波组较弱，而且相邻巷道的地震剖面则表现为底板反射中断，研究对于真实的采空区地震资料的解释和处理具有重要的意义。

Numerical simulation of seismic wave field in goaf of coal mine

In order to better predict the mined-out area of coal mines，this paper used the Tesseral-2D forward modeling software and the numerical simulation software of the coal mine underground 3D seismic wave to conduct the detection of goaf.According to the characteristics of the software，the self excitation and single-shot forward modeling of the goaf in the coal mine were carried out.Results showed that when the seismic wave encounters a goaf，the waveform will be warped and not smooth，and similar beaded waveforms will be encountered just below the goaf.When the distance between the gobs is less than 10 m，beaded waveforms between the gobs will interfere with each other，making the waveform more blurred and unclear；due to the presence of roadway in the coal seam，the reflection of the coal seam floor is very weak，the specific feature is that the wave group reflected by the roof of the gob area is weak，and the seismic profile of the adjacent roadway is reflected by the floor reflection.The study is of great significance to the interpretation and processing of the actual goaf seismic data.