【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.更多还原

【Abstract】 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.更多还原