三峡水库运行诱发地震机制研究
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摘要
基于断裂力学的理论,对断层应力强度因子进行了复合及分析,研究了库区断层在库水荷载(包括库水荷载所产生的附加应力场和超孔隙水压力)和区域构造应力场叠加作用下,发生诱发地震时所产生的能量及震级,并建立了相应的计算公式及得出相应影响参数,证明了在水库运行过程中水位频繁变动加大地震诱发可能性的结论正确性。
Based on the theory of fractural mechanics,stress intensity factors of the fault of the composite,an analysis is made of the reservoir water load fault in the library(including the reservoir water load generated by the additional stress and excess pore water pressure) and the regional tectonic stress field superimposed,the occurrence of induced earthquakes generated by the energy and magnitude,and the corresponding formula and the corresponding impact parameters obtained show that in the reservoir water level during the operation of frequent changes increases the possibility of earthquake-induced conclusion validity.
Based on the theory of fractural mechanics,stress intensity factors of the fault of the composite,an analysis is made of the reservoir water load fault in the library(including the reservoir water load generated by the additional stress and excess pore water pressure) and the regional tectonic stress field superimposed,the occurrence of induced earthquakes generated by the energy and magnitude,and the corresponding formula and the corresponding impact parameters obtained show that in the reservoir water level during the operation of frequent changes increases the possibility of earthquake-induced conclusion validity.
引文
[1]杨清源.我国近年水库地震监测综述[J].地震地磁观测与研究,1999,20(2):3-15.
[2]丁原章.水库诱发地震[M].北京:地震出版社,1989.
[3]陈敏,戴应洪,王小龙,等.三峡水库地震孕震机理及蓄水地震活动分析[J].防灾科技学院学报,2007,9(4):42-45,49.
[4]胡毓良,陈献程.我国的水库地震及有关成因问题的讨论[J].地震地质,1979,1(4):43-57.
[5]苏锦星,汪雍熙.水库诱发地震可能性的定量评价[J].工程地质学报,2000,8(S):68-73.
[6]薛军蓉.三峡水库蓄水初期9次微震震源机制解特征[J].大地测量与地球动力学,2004,24(2):48-51.
[7]袁曲,董建辉.三峡水库地震孕震机理与未来地震趋势初探[J].地震地磁观测与研究,2005,26(B10):37-47.
[8]易立新,车用太.水库诱发地震及其水文地质条件和诱震机理[J].中国地质灾害与防治学报,2000,11(2):46-50.
[9]王墩,姚运生,薛军蓉,等.三峡水库重点监视区蓄水前后震源机制研究[J].大地测量与地球动力学,2007,27(5):103-107.
[10]刘世凯,涂光美.三峡水库应力场对水田坝断裂影响的数学-力学模型研究[J].工程地质学报,1996,4(3):53-58.
[11]陈献程,杨清源.重庆巴山水电站水库诱发地震的初步评价[J].华南地震,2004,24(1):44-50.
[12]李锦辉.库区构造应力场对水库诱发地震的影响[J].武汉大学学报(工学版),2007,40(6):51-55.
[13]WD Gough,WI Gough.Stress and deflection in the lithospherenear Lake Kariba[J].Geophysical Journal International,1970,21:65-78.
[14]Yao Yunsheng.Tectonic deformation of the Jianghan Dongtingbasin and its surrounding areas fromlate Mesozoic to cenozoic[J].Geotectonica Et Metallogenia,2000,24(2):140-145.
[15]MLee Bell,Amos Nur.Strength Changes Due to Reservoir-In-duced Pore Pressure and Stresses and Application to LakeOroville[J].Geophysical Reserch,1978,83:4 469-4 483.
[16]杨清源,陈晓莉,陈献程.水库诱发地震的最大震级及其发震时间的预测研究[J].地震学报,2001,23(5):523-529.
[2]丁原章.水库诱发地震[M].北京:地震出版社,1989.
[3]陈敏,戴应洪,王小龙,等.三峡水库地震孕震机理及蓄水地震活动分析[J].防灾科技学院学报,2007,9(4):42-45,49.
[4]胡毓良,陈献程.我国的水库地震及有关成因问题的讨论[J].地震地质,1979,1(4):43-57.
[5]苏锦星,汪雍熙.水库诱发地震可能性的定量评价[J].工程地质学报,2000,8(S):68-73.
[6]薛军蓉.三峡水库蓄水初期9次微震震源机制解特征[J].大地测量与地球动力学,2004,24(2):48-51.
[7]袁曲,董建辉.三峡水库地震孕震机理与未来地震趋势初探[J].地震地磁观测与研究,2005,26(B10):37-47.
[8]易立新,车用太.水库诱发地震及其水文地质条件和诱震机理[J].中国地质灾害与防治学报,2000,11(2):46-50.
[9]王墩,姚运生,薛军蓉,等.三峡水库重点监视区蓄水前后震源机制研究[J].大地测量与地球动力学,2007,27(5):103-107.
[10]刘世凯,涂光美.三峡水库应力场对水田坝断裂影响的数学-力学模型研究[J].工程地质学报,1996,4(3):53-58.
[11]陈献程,杨清源.重庆巴山水电站水库诱发地震的初步评价[J].华南地震,2004,24(1):44-50.
[12]李锦辉.库区构造应力场对水库诱发地震的影响[J].武汉大学学报(工学版),2007,40(6):51-55.
[13]WD Gough,WI Gough.Stress and deflection in the lithospherenear Lake Kariba[J].Geophysical Journal International,1970,21:65-78.
[14]Yao Yunsheng.Tectonic deformation of the Jianghan Dongtingbasin and its surrounding areas fromlate Mesozoic to cenozoic[J].Geotectonica Et Metallogenia,2000,24(2):140-145.
[15]MLee Bell,Amos Nur.Strength Changes Due to Reservoir-In-duced Pore Pressure and Stresses and Application to LakeOroville[J].Geophysical Reserch,1978,83:4 469-4 483.
[16]杨清源,陈晓莉,陈献程.水库诱发地震的最大震级及其发震时间的预测研究[J].地震学报,2001,23(5):523-529.
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