微地震震源地震波能量的计算方法
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摘要
由工程爆破中普遍采用的质点峰值振动速度与炸药量和震源距关系的经验公式推导出质点峰值振动速度与震源能量和震源距关系的经验公式,并作为微震地震波能量衰减公式.在公式中引入地震波能量特征系数K1描述震源能量与震源峰值振动速度之间的比例关系,并认为K1主要与震源场地介质特征有关,而与爆破参数无关.通过校验炮数据的回归分析获取监测区域能量特征系数K1.采用能量衰减模型,以微震事件各测点的峰值振动速度、震源距及K1为已知量,以震源能量及衰减系数为回归参数进行回归计算,直接反演出震源能量.本文方法为震源能量计算提供了新的思路和方法.
An empirical formula to describe the relation of particle vibration velocity to explosive’s quantity and distance from the explosion center is used in the blasting engineering field.Based on this formula,a new empirical equation to characterize the relation of particle vibration velocity to hypocenter energy and distance to the hypocenter is presented in this article,which is considered as the attenuation formula of seismic wave energy.In the new equation,the coeffcient of seismic wave energy,K1,is introduced to describe the relationship between hypocenter energy and particle vibration velocity.It is thought that K1 has strong relationship with the locale medium characteristic of the hypocenter,nothing to do with the blasting parameters.According to the energy data of check points,K1 is calculated by regression analysis.By using the energy attenuation model,taking particle vibration velocity,distance to the hypocenter and K1 of each microseismic incident as the known parameters,hypocenter energy and attenuation coeffcient as the regression parameters,the hypocenter energy can be obtained by inverse calculation.This method provides a new idea to calculate the hypocenter energy.
An empirical formula to describe the relation of particle vibration velocity to explosive’s quantity and distance from the explosion center is used in the blasting engineering field.Based on this formula,a new empirical equation to characterize the relation of particle vibration velocity to hypocenter energy and distance to the hypocenter is presented in this article,which is considered as the attenuation formula of seismic wave energy.In the new equation,the coeffcient of seismic wave energy,K1,is introduced to describe the relationship between hypocenter energy and particle vibration velocity.It is thought that K1 has strong relationship with the locale medium characteristic of the hypocenter,nothing to do with the blasting parameters.According to the energy data of check points,K1 is calculated by regression analysis.By using the energy attenuation model,taking particle vibration velocity,distance to the hypocenter and K1 of each microseismic incident as the known parameters,hypocenter energy and attenuation coeffcient as the regression parameters,the hypocenter energy can be obtained by inverse calculation.This method provides a new idea to calculate the hypocenter energy.
引文
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[2]Jiang F X,Xun L,Yang S H.Study on microseismic mon-itoring for spatial structure of overlying strata and miningpressure field in longwall face.Chin J Geotech Eng,2003,25(1):23(姜福兴,Xun L,杨淑华.采场覆岩空间破裂与采动应力场的微震探测研究.岩土工程学报,2003,25(1):23)
[3]Wang J Q,Jiang F X,Lu¨W S,et al.Microseismic wavepropagation velocity in situ experiment and calculation.J China Coal Soc,2010,35(12):2059(王进强,姜福兴,吕文生,等.地震波传播速度原位试验及计算.煤炭学报,2010,35(12):2059)
[4]Bertoncini C A,Hinders M K.Fuzzy classification of rooffall predictors in microseismic monitoring.Measurement,2010,43(10):1690
[5]Dou L M,He X Q,Wang E Y,et al.The mechanism ofrock burst and seismic waves and its preventation.GroundPressure Strata Control,1999(Supp l):199(窦林名,何学秋,王恩元,等.冲击矿压与震动的机理及预报研究.矿山压力与顶板管理,1999(增刊1):199)
[6]Gao M S,Dou L M,Zhang N,et al.Experimental studyon earthquake tremor for transmitting law of rock burst ingeomaterials.Chin J Rock Mech Eng,2007,26(7):1365(高明仕,窦林名,张农,等.岩土介质中冲击震动波传播规律的微震试验研究.岩石力学与工程学报,2007,26(7):1365)
[7]Li Z,Zhu R G,Hu Z L,et al.Studies on the characteris-tic coeffcient and attenuation index in the measurementof blasting seismic wave.Explos Shock Waves,1986,6(3):221(李铮,朱瑞赓,胡再龙,等.爆炸地震波振速的特征系数与衰减指数的研究.爆炸与冲击,1986,6(3):221)
[8]Yan Y F,Chen S H,Zhang Q H,et al.Optimizationstudy on calculation of blasting vibration peak velocity.Eng Blast,2010,16(4):9(燕永峰,陈士海,张秋华,等.爆破振动峰值速度计算的优化研究.工程爆破,2010,16(4):9)
[9]Fu H F.Experimental research of blasting excavation ofsoft rock for construction concrete face rock-fill dam.EngBlast,2005,11(1):56(傅海峰.利用软岩修筑面板堆石坝爆破开采技术试验研究.工程爆破,2005,11(1):56)
[10]Zhang S Q,Guo J M.On the coupling factor of an explo-sion.Chin J Geophys,1984,27(6):537(张少泉,郭建明.爆炸地震的能量转换系数计算及其应用.地球物理学报,1984,27(6):537)
[11]Peng Y Q,Liu S Y.Ground shock effect of mine explo-sion of Heishan iron mine.Earthquake Res Shanxi,1997,42(3):18(彭远黔,刘素英.承德钢铁公司黑山铁矿矿山爆破地震动效应.山西地震,1997,42(3):18)
[12]Tan S Q.The delay stack explosion technique and its ap-plications.Geophys Prospect Pet,2003,42(4):427(谭绍泉.震源延迟叠加技术及应用效果.石油物探,2003,42(4):427)
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