“岩—煤—岩”结构中SH型槽波特性研究

Research on SH type channel wave in "rock-coal-rock" structure

矿井安全生产受前方采空区、断层破碎带等复杂地质因素制约,现有高精度地面地震勘探及矿井地球物理探测精度均难以满足安全生产的地质需求,为保障复杂地质条件下矿井安全、高效生产,开展槽波反射波法超前探测研究十分必要。深入研究了地震波在"岩—煤—岩"这一特殊结构中的传播特性,通过研究SH型槽波的波动特征,对其相对稳定的波动特征给予了定量表示;通过波场正演模拟研究发现,煤层厚度、激发点位置、反射界面倾角等因素改变时,SH型槽波波动特征相对稳定,这一特征的发现对槽波超前探测的推广及应用有重要指导意义。

Colliery safety production is severely constrained by some complex geological factors,such as goaf and fault fracture zone ahead. The existing high-precision surface seismic exploration and mine geophysical detection accuracy is difficult to meet the geological demand of safety production,in order to ensure the security and efficiency of mining production under complicated geological conditions,it is necessary to carry out research on advanced exploration by using channel wave reflection prediction means. This paper deeply studied the transmission characteristics of seismic wave in the ＂ rock-coal-rock＂ structure,by studying the fluctuation characteristics of SH channel wave,a quantitative representation has been made for the relatively stable characteristics. Through the research on forward simulation of wave field,it was found that,when the depth of coal seam,the position of trigger point,and the inclined angle of reflection interface change,the fluctuation characteristics of SH channel wave is relatively stable. This conclusion has important guiding significance to the promotion and application of advanced detection.