低频前驱波传播机理的研究现状
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摘要
本文从低频前驱波传播的理论与实验等方面对其传播机理的研究现状进行了简要概述。断裂预扩展、过热液体暴沸、粘滑地震前的预滑等均可能产生低频前驱波;微破裂集结、均匀和非均匀断层滑动失稳成核、声透射等实验均证实了岩石在大破裂前确实能够产生一种长周期、小振幅的低频事件;低速断层、壳内低速层、承压含水层、水体大连通性好的灰岩含水层、大气中的声波导层有利于低频前驱波传播。
From the aspects of propagation theory and experiments of low-frequency precursory waves,a review of the research on its propagation mechanism is presented in this paper.Pre-extension of faults,bumping of over-heated liquid and pre-slipping before stick-slip earthquakes all have the possibility to produce low-frequency precursory waves.The experiments of micro-fracture concentration and sound transmission have proved that rocks can produce a type of long-period and small-amplitude low-frequency events.The low-velocity faults,low-velocity layers in the crust,confined aquifers,limestone aquifers with good connectivity of large water unit and the conductive layer of sound wave in the atmosphere are favorable for the propagation of low-frequency precursory waves.
From the aspects of propagation theory and experiments of low-frequency precursory waves,a review of the research on its propagation mechanism is presented in this paper.Pre-extension of faults,bumping of over-heated liquid and pre-slipping before stick-slip earthquakes all have the possibility to produce low-frequency precursory waves.The experiments of micro-fracture concentration and sound transmission have proved that rocks can produce a type of long-period and small-amplitude low-frequency events.The low-velocity faults,low-velocity layers in the crust,confined aquifers,limestone aquifers with good connectivity of large water unit and the conductive layer of sound wave in the atmosphere are favorable for the propagation of low-frequency precursory waves.
引文
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[15]李红,李世愚,许征宇,等.高围压下岩石材料的断裂力学实验.地震学报,1992,14(1):124-127
[16]韩元杰.预滑与地震前兆——长周期波动研究.西北地震学报,1984,6(1):18-24
[17]楼海,王椿镛,丁志峰,等.昆仑山断层围陷波的分析和研究.地球物理学报,2006,49(3):788-796
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[22]简文彬,陈葆仁,卢华复.承压含水层波导及其地声响应研究.地震学报,1997,19(3):309-316
[2]Crescentini L,Amoruso A,Scarpa R.Constraints on slow earthquake dynamics from a swarm in Central Italy.Science,1996,286:2 132-2 134
[3]McGuire J J,Ihmle P F,Jordan T H.Time-domain observations of slow precursor to the 1994 Romanche trans-form earthquake.Science,1996,274:82-85
[4]杨又陵,赵根模,高国英,等.2001年11月14日昆仑山口西M8.1级地震前的缓慢地震事件.国际地震动态,2003(9):1-4
[5]车用太,金鱼子,张淑亮,等.山西朔州井水位的“前驱波”记录及其讨论.地震学报,2002,24(2):210-216
[6]张淑亮,范雪芳.井水位长周期事件记录及其机理的讨论.地震,2003,23(4):85-90
[7]冯德益,潘琴龙,郑斯华,等.长周期形变波及其所反应的短期和临震地震前兆.地震学报,1984,16(1):41-57
[8]郭增建,秦保燕.大震前予位移的讨论.西北地震学报,1979,1(2):34-40
[9]苏昉,田维.2000年7～9月强地震的前兆次声波测量研究.地震研究,2002,25(1):11-19
[10]刘万琴,李世愚,郑治真,等.破坏性矿震震前短临阶段震源过程研究.地震学报,1999,21(1):57-64
[11]李世愚,滕春凯,卢振业,等.典型构造微破裂集结的实验研究.地震学报,2000,22(3):278-286
[12]马胜利,刘力强,马瑾,等.均匀和非均匀断层滑动失稳成核过程的实验研究.中国科学,2003,33(增刊):45-52
[13]许昭永,梅世蓉,杨润海,等.远场和超远场前兆的模拟实验研究.地震研究,2001,24(4):332-337
[14]唐林波,李世愚,苏昉,等.强地震前兆低频波的实验研究.中国地震,2002,19(1):48-56
[15]李红,李世愚,许征宇,等.高围压下岩石材料的断裂力学实验.地震学报,1992,14(1):124-127
[16]韩元杰.预滑与地震前兆——长周期波动研究.西北地震学报,1984,6(1):18-24
[17]楼海,王椿镛,丁志峰,等.昆仑山断层围陷波的分析和研究.地球物理学报,2006,49(3):788-796
[18]李松林,张先康,樊计昌.利用断层围陷波研究昆仑山口西8.1级地震破裂面.地震学报,2005,27(1):42-50
[19]张碧星,喻明,熊伟,等.多层介质地层中有低速层出现时的陷模研究.中国有色金属学报,1998,8(2):340-346
[20]张碧星,鲁来玉.层状半空间中导波的传播.声学学报,2002,27(4):295-304
[21]Johnson P A,Albright J N.In:Proceedings of SEG 57th Annual International Meeting.1987:22-27
[22]简文彬,陈葆仁,卢华复.承压含水层波导及其地声响应研究.地震学报,1997,19(3):309-316
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