【摘要】 用交错网格有限差分法对煤巷内不同地质模型中的弹性波场进行了数值模拟,分析了不同地质模型中的波场特征和各类波型的传播特征。研究表明:在工作面前方的构造界面上会产生能量较强的绕射波,绕射波波至最迟与其它波波至时间间隔较大,波列较宽是识别工作面前方存在构造界面的特征波。虽然在工作面前方构造界面上产生的反射波也标志工作面前方存在构造界面,但易与干扰波混杂在一起不易识别提取。更多还原

【Abstract】 Seismic wave field in two geological models of coal seam was simulated by using staggered-grid finite difference method,and seismic wave field characteristics and propagation characteristics of various wave patterns in different models were analyzed.As a result,if there is a geological interface before coal face,the high-amplitude diffraction wave of geological interface will be recorded.The diffraction wave is recorded last.The time interval between diffraction wave arrival time and others’is longer.The diffraction wave train is wider than other waves.So diffraction wave can be used to identify geological interface before coal face.Reflected waves of geological interface are marks of geological interface before coal face also.But reflected waves are usual mixing with other waves,so they can’t be distinguished usually.更多还原