多波多分量地震合成记录上的煤层特征指示研究  

CHARACTERSTIC INDICATOR OF COAL SEAM ON MULTI COMPONENT AND MULTI WAVE SYNTHETICS

作　　者：潘冬明[1,2] 杨顶辉[1,2] 张慧[1,2] 

机构地区：[1]中国矿业大学 [2]中国科学院地球物理研究所

出　　处：《长春地质学院学报》1997年第1期74-77,共4页

基　　金：国家自然科学基金

摘　　要：利用有限差分法弹性波场数值模拟技术，对水平产状、断块分布与尖灭煤层体地质环境下的井中激发与接收的多波多分量地震记录进行数值模拟，探讨了水平产状、断块分布与煤层尖灭情形下三分量地震记录上的波场特征。研究表明，水平产状煤层中槽波最为发育，断块分布煤层中次之，而尖灭煤层中在尖灭端处接收时很难分辨出槽波特征，但在尖端处激发时可以在跨孔观测记录上分辨出颇为发育的槽波。在地面记录上波的运动学与动力学特征也存在一定程度的差异。By utilizing numerical technique for simulation of elastic wavefields with finite difference method,multi component and multi wave seismic records generated and received in crosshole within the geological environment of horizontal,blocked and emerging coal seam, respectively, are simulated. We investigate the features on three component seismic rocords in the cases of horizontal, blocked and emerging coal seam respectively. The results show that the in seam wave is received at the emerging point for the emerging coal seam,but we can receive well developed in seam wave on observed crosshole records which is generated at the emerging point. There are also some differences on the geometrical and dynamic features on surface records among different geoiongical enviroments. It′s concluded that the study of generation and observation of crosshole multi component and multi wave seismic records is very important for the reaearch of the existence and distribution of coal seam.

关 键 词：煤矿床 煤层 地震勘探 地震记录 

分 类 号：P618.110.8[天文地球—矿床学]