围岩松动圈对TSP预报的影响研究
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摘要
隧道在开挖过程中形成的围岩松动圈,隧道地震预报TSP技术的数据采集是在隧道围岩中进行的,因此必须考虑围岩松动圈对TSP采集的影响,采用波场快照与时间记录相结合的方法,本文研究了松动圈对不同组合的震源和检波器生成地震波场的影响,并对每种组合的时间记录进行了处理,对比了数值模型与处理提取到的反射界面位置,若检波器或者震源全部或者其中之一埋设在松动圈内,会使得提取到的反射界面相对于模型设置有延后的现象出现,最后通过对工程实例的处理分析,验证了数值模拟所得结论.
In the process of the tunnel excavation,rock loose circle formed.Due to the data acquisition of tunnel seismic prediction is conducted in a tunnel surrounding rock,we have to consider rock loose circle's impact on the TSP,adopted snapshot of wave field combined with the time records.We research the effects of the rock loose circle on the generation of seismic wave field when different combination of source and geophone,and time records were processed in each case.Compared the interface position of the numerical model reflection with the results which extracted from the experiment,we found that if the detector or all or one of source buried in loose circles,that will make the results of the reflector respect to its actual position on the mileage segment has postponed.Finally a real case by engineering analysis verified numerical simulation of the conclusions.
In the process of the tunnel excavation,rock loose circle formed.Due to the data acquisition of tunnel seismic prediction is conducted in a tunnel surrounding rock,we have to consider rock loose circle's impact on the TSP,adopted snapshot of wave field combined with the time records.We research the effects of the rock loose circle on the generation of seismic wave field when different combination of source and geophone,and time records were processed in each case.Compared the interface position of the numerical model reflection with the results which extracted from the experiment,we found that if the detector or all or one of source buried in loose circles,that will make the results of the reflector respect to its actual position on the mileage segment has postponed.Finally a real case by engineering analysis verified numerical simulation of the conclusions.
引文
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Wang Y X,Shi Z J,Li S Y.1994.Development of depth migration and its applicationCJ].OGP(in Chinese),29(4):526-531.
Wang Z L,Liu Z P.2012a.Realization of viscoelastic boundary condition in wave field simulation with ansys finite element software[J 1 Journal of Geodesy and Geodynamics(in Chinese).32(2):28-31.
Wang Z L,Liu Z P.2012b.The modelling study of r-p transform applied in the tunnel seismic prediction[J].Progress in Geophysics(in Chinese),27(5):2216-2225,doi:10.6038/j.issn.1004-2903.2012.05.049.
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Xu Y,Su Y J.et al.2004.Development of Q-value studies[J].Journal of Seismological Research(in Chinese),27(4):385-389.
Yang F.2007.The ray tracing numerical simulation study of typical geological anomalous body in tunnel advance prediction(in Chinese)[D].Chengdu:Southwest Jiaotong University.
李光扬.蒋再文.2012.地质偏压隧道围岩破坏规律研究[J].公路,(3):227-232.刘志刚,刘秀峰.2003.TSP(隧道地震勘探)在隧道隧洞超前预报中的应用与发展[J].岩石力学与工程学报,22(8):1399-1402.
沈明荣,陈建峰.2006.岩体力学[M].上海:同济大学出版社.
石建军,马念杰,闫德忠,等.2008.巷道围岩松动圈测试技术及应用[J].煤炭工程,(3):32-34.
王有新,史政军,李少英.1994.深度偏移的发展与应用概况[J].石油地球物理勘探,29(4):526-531.
王朝令,刘争平.2012a.黏弹性边界条件在ANSYS有限元波场模拟中的实现[J].大地测量与地球动力学,32(2):28-31.
王朝令,刘争平.2012b.-p变换在隧道反射地震超前预报波场分离中应用的数值模拟研究[J].地球物理学进展,27(5):2216-2225,doi:10.6038/j.issn.1004-2903.2012.05.049.
王朝令.2012.隧道地震超前预报中波场分离与反演方法的数值模拟研究[D].成都:西南交通大学.
徐彦,苏有锦,秦嘉政.2004.Q值研究动态[J].地震研究,27(4):385-389.
杨峰.2007.TSP隧道超前预报中典型地质异常体的射线追踪数值模拟研究[D].成都:西南交通大学.
Bohlen T,Lorang U,Rabbel W,et al.2007.Rayleigh-to-shear wave conversion at the tunnel face-From 3D-FD modeling to ahead-of-drill exploration[J].Geophysics,72(6):T67-T79.
Li G Y,J Z W.2012.Breakage of rock tunnel geological bias[J].Highway(in Chinese),(3):227-232.
Liu Z G,Liu X F.2003.TSP application and development in tunnel lead forecast[J],Chinese Journal of Rock Mechanics and Engineering(in Chinese),22(8):1399-1402.
Shen M R,Chen J F.2006.Rock Mechanics(in Chinese)[M].Shanghai:Tongji University Press.
Shi J J,Ma N J,Yan D Z,et al.2008.Measure technology for loose circle of crush roadway surrounding rock and its application[J].Coal Engineering(in Chinese),(3):32-34.
Wang Y X,Shi Z J,Li S Y.1994.Development of depth migration and its applicationCJ].OGP(in Chinese),29(4):526-531.
Wang Z L,Liu Z P.2012a.Realization of viscoelastic boundary condition in wave field simulation with ansys finite element software[J 1 Journal of Geodesy and Geodynamics(in Chinese).32(2):28-31.
Wang Z L,Liu Z P.2012b.The modelling study of r-p transform applied in the tunnel seismic prediction[J].Progress in Geophysics(in Chinese),27(5):2216-2225,doi:10.6038/j.issn.1004-2903.2012.05.049.
Wang Z L.2012.The numerical simulation research on separation of wave field and inversion method in tunnel seismic prediction(in Chinese)[D].Chengdu:Southwest Jiaotong University.
Xu Y,Su Y J.et al.2004.Development of Q-value studies[J].Journal of Seismological Research(in Chinese),27(4):385-389.
Yang F.2007.The ray tracing numerical simulation study of typical geological anomalous body in tunnel advance prediction(in Chinese)[D].Chengdu:Southwest Jiaotong University.
李光扬.蒋再文.2012.地质偏压隧道围岩破坏规律研究[J].公路,(3):227-232.刘志刚,刘秀峰.2003.TSP(隧道地震勘探)在隧道隧洞超前预报中的应用与发展[J].岩石力学与工程学报,22(8):1399-1402.
沈明荣,陈建峰.2006.岩体力学[M].上海:同济大学出版社.
石建军,马念杰,闫德忠,等.2008.巷道围岩松动圈测试技术及应用[J].煤炭工程,(3):32-34.
王有新,史政军,李少英.1994.深度偏移的发展与应用概况[J].石油地球物理勘探,29(4):526-531.
王朝令,刘争平.2012a.黏弹性边界条件在ANSYS有限元波场模拟中的实现[J].大地测量与地球动力学,32(2):28-31.
王朝令,刘争平.2012b.-p变换在隧道反射地震超前预报波场分离中应用的数值模拟研究[J].地球物理学进展,27(5):2216-2225,doi:10.6038/j.issn.1004-2903.2012.05.049.
王朝令.2012.隧道地震超前预报中波场分离与反演方法的数值模拟研究[D].成都:西南交通大学.
徐彦,苏有锦,秦嘉政.2004.Q值研究动态[J].地震研究,27(4):385-389.
杨峰.2007.TSP隧道超前预报中典型地质异常体的射线追踪数值模拟研究[D].成都:西南交通大学.
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