由井-含水层系统对地震波的响应估计BK_u系数  

Calculation of the BK_u value from the well-aquifer system response to seismic waves

作　　者：赵頔 史浙明[1,2,3] 王广才[1,2,3] 周平根[4] 孙小龙[5] 丁谋 ZHAO Di;SHI Zheming;WANG Guangca;ZHOU Pinggen;SUN Xiaolong;DING Mou(School of Water Resources and Environment,China University of Geosciences（Beijing）,Beijing 100083,China;State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences（Beijing）,Beijing 100083,China;Key Laboratory of Groundwater Circulation and Environmental Evolution of Ministry ofEducation,China University of Geoscieuces（Beijing）,Beijing 100083,China;Institute of Geological EnvironmentalSurvey,Beijing 100081,China;Institute of Crustal Dynamics,China Earthquake Administration,Beifing 100085,China;Tianjin Chengjian University,Tian]in 300384,China)

机构地区：[1]中国地质大学(北京)生物地质与环境地质国家重点实验室,北京100083 [2]中国地质大学(北京)地下水循环与环境演化教育部重点实验室,北京100083 [3]中国地质大学(北京)水资源与环境学院,北京100083 [4]中国地质环境监测院,北京100081 [5]中国地震局地壳应力研究所(地壳动力学重点实验室),北京100085 [6]天津城建大学环境与市政工程学院,天津300384

出　　处：《水文地质工程地质》2018年第6期49-55,共7页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金(U1602233; 41572238; 41502239);北京市优秀人才计划(2016000020124G110)

摘　　要：由地震波引起的地下水位振荡和持久性变化特征被广泛探讨,然而水位对S和Love波的响应及敞口自流井井孔储积效应的校正未得到定量化研究。以理想孔隙弹性介质线性孔隙弹性理论为基础,探究了井-含水层系统孔隙压力变化与体应变和偏应变之间的数学表达式,通过对2011年3月11日日本Mw9. 0地震引起的北京昌平地震台地下水观测井实测水位变化与曲线拟合得到的计算值对比,肯定了孔隙压力的影响因素并求解岩石线弹性系数BKu。与潮汐分析方法对比,验证了由地震方法推算的岩石弹性特性代表实际的含水层特征。此外相关系数结果表明水位振荡同时受到体应力和偏应力的共同影响。The characteristics of groundwater oscillation and persistent variation caused by seismic waves have extensively been discussed. However, the response of groundwater level to S and Love waves and the correction of well storage effect in open self-flowing wells have not been quantified. Based on the theory of linear pore elasticity in the ideal porous elastic medium, the mathematical expressions between pore pressure variation and bulk strain and deviation strain in the well-aquifer system are investigated. By comparing the measured groundwater level variation of the Changping groundwater observation well caused by Mw9. 0 earthquake in Japan on Mah 11, 2011 with the calculated values obtained by curve fitting, the influencing factors of pore pressure are confirmed and the linear elastic coefficient BK, of the rock is solved. Compared with the tidal analysis, it is verified that the elastic characteristics of the rock derived from the seismic method represent the actual aquifer characteristics. In addition, the correlation coefficient shows that the groundwater level oscillation is affected by both the volumetric and the deviatoric dynamic strains.

关 键 词：地震地下流体 昌平井 曲线拟合 井储效应 孔隙压力 北京 

分 类 号：P641.1[天文地球—地质矿产勘探]