煤巷地震超前探测数值模拟及波场特征研究  

Numerical simulation of fore detecting with seismic in coal roadway and study of wave field characteristics

作　　者：杨思通[1] 程久龙[1,2] 

机构地区：[1]山东科技大学矿山灾害预防控制教育部重点实验室,山东青岛266510 [2]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《煤炭学报》2010年第10期1633-1637,共5页Journal of China Coal Society

基　　金：国家自然科学基金重点资助项目(51034003);国家自然科学基金资助项目(50974081;50774051);国家重点基础研究发展计划(973)资助项目(2007CB209406);教育部长江学者和创新团队发展计划项目(IRT0843);山东科技大学科学研究"春蕾计划"资助项目(2008AZZ012)

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。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.

关 键 词：煤巷超前探测 地震波场 交错网格有限差分法 绕射波 

分 类 号：P631.4[天文地球—地质矿产勘探]