地震CT反演方法在井下起伏厚煤层中的应用  

Application of Seismic CT Inversion in Minefield with Undulating Coal Seams

作　　者：李娜[1] 邢立杰 张建智[1] 程增庆[1] 

机构地区：[1]中国煤炭地质总局地球物理勘探研究院,河北涿州072750 [2]中煤地质工程总公司,北京100161

出　　处：《中国煤炭地质》2015年第12期79-82,共4页Coal Geology of China

基　　金：中石油<物探重大技术现场试验及集成配套>(2011D-3806);子课题<高精度地球物理技术在煤矿安全开采工程中的研究与应用>

摘　　要：对于煤层底板起伏较大的综采工作面,常规的二维射线追踪及反演方法会导致矿井地震CT解释结果出现较大偏差。以大同某矿井为例,针对起伏厚煤层,采用精细定位、改进观测系统和三维空间射线追踪的方法进行地震CT反演,以解释该矿井1408工作面的构造煤赋存范围与断层。依据巷道揭露地质特征,1408工作面3个P波低速异常区解释为构造煤发育区及陷落柱,圈定的范围得到矿方验证。To fully mechanized mining working face with larger undulating coal seams, conventional 2D ray tracing and inversion will lead larger deviation in minefield seismic CT interpretation results. Taking a minefield in Datong as example, in allusion to undulating thick coal seams, using fine positioning, improved field setup and 3D spatial ray tracing carried out seismic CT inversion, to interpret tectonoclastic coal occurrence extent and fault in minefield working face No.1408. According to roadway revealed geological features, 3P wave low velocity abnormal places in the working face have interpreted as tectonoclastic coal developed area and subsided column;the delineated extents have been verified by coalmine side.

关 键 词：起伏煤层 地震CT成像 P波 S波 勒夫波 构造煤 

分 类 号：P631[天文地球—地质矿产勘探]