煤层陷落柱的三维地震槽波正演模拟  

Forward Modeling of 3D Seismic Channel Wave in Coal Seam Subsided Column

作　　者：余为维 冯磊[2,3] 杜艳艳 李朝旭 YU Wei-wei;FENG Lei;DU Yan-yan;LI Zhao-xu(School of Geophysics and Information Technology, China University of Geosciences(Beijing), Beijing 100083, China;Institute of Resource and Environment,Henan Polytechnic University,Jiaozuo 454000,China;Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Henan Province, Jiaozuo 454000, China;The Third Geo-exploration Institute, Henan Bureau of Geo-exploration and Mineral Development, Zhengzhou 451464,China)

机构地区：[1]中国地质大学(北京)地球物理与信息技术学院,北京100083 [2]河南理工大学资源环境学院,河南焦作454000 [3]中原经济区煤层(页岩)气河南省协同创新中心,河南焦作454000 [4]河南省地质矿产勘查开发局第三地质勘查院,郑州451464

出　　处：《煤炭技术》2019年第3期73-76,共4页Coal Technology

基　　金：河南省科技公关项目(172102310722);河南省自然科学基金(182300410125);中央高校基本科研业务费优秀导师基金项目(2652017437)

摘　　要：采用透射法槽波地震方法对煤层陷落柱进行了三维正演模拟。发现煤层中无陷落柱时,X分量同相轴连续性中断,而Y与Z分量连续性好。当煤层中存在陷落柱时,X分量中央底部形成明显的能量集中区域,在Y与Z分量上出现同相轴中断现象,形成次级槽波。改变炮点位置,陷落柱处的地震槽波能量衰减相对较小,而透射陷落柱后的槽波能量大幅衰减。The 3 D forward modeling of coal seam subsided column is carried out by the method of transmission channel wave seismic. In the case of coal seam with no subsided column, the event continuity in X-component is interrupted and the event in Y-component and Z-component has a good continuity. In the case of coal seam with subsided columns, an obvious area of energy concentration is formed around the bottom of the center part in X-component. Besides, the event interruptions occur in Y-component and Z-component, resulting in secondary channel waves. By changing the shot position,the energy attenuation of the channel wave near subsided column is relatively small, while the energy shows a significant attenuation after transmitting through the subsided column.

关 键 词：槽波 透射法 陷落柱 煤层 正演 

分 类 号：P631.4[天文地球—地质矿产勘探]