考虑断裂破碎带的丹江口库区地应力场与水压应力场耦合反演及地震预测  

Coupling numerical simulation of the in-situ stress and hydraulic-pressure fields in Danjiangkou area using the modeling with the zone of chasm and fault

作　　者：谢向东[1] 刘素梅[2] 

机构地区：[1]湖北文理学院机械与汽车工程学院,湖北襄阳441053 [2]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《西安建筑科技大学学报（自然科学版）》2014年第4期529-535,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：湖北省自然科学基金资助项目(2012FFC05201;2011CDB267)

摘　　要：根据丹江口库区的地质构造特征,运用ABAQUS软件建立考虑断裂破碎带的三维有限元新模型,反演两场相互作用下库区的应力场和应变场,分析水库二期蓄水后库区的稳定情况并预测丹江口库区二期工程诱发地震的可能性与危险区.研究结果表明:二期蓄水后沿公路断裂带沿线以南、丹江断裂带以东、均陨断裂带以北和丹江断裂带以西这些浅层拉应力区可能会因为受拉破坏引发一系列微震;光化、谷城、石化街地区、丹江断裂带的东南段和公路破碎带沿线可能会因为剪切滑移诱发一系列的微震;宋湾外围、林茂山外围、丹库的外围可能会因为库水下渗和剪切滑移诱发一些小震;老均县南北一线、保康—远安一线、襄阳—钟祥一线和郧县—习家店一线可能会因为剪切滑移诱发一些小震.The 3-D finite element model considering the zone of chasm and fault is established according to seismogeological characteristics of Danjiangkou area by the software of ABAQUS. The stress and strain fields of the model are calculated reversely in the condition of interaction of the in-situ stress and the second impoundment water pressure fields, the stability of reservoir area is analyzed, the possibility and risk area of induced seismic is forecasted. The results show that after the second impoundment a series of microseisms would be tempted by stretch in such tensile stress areas as the south of Gonglu chasm, the east of Danjiang chasm, the north of Junyun chasm and the west of Danjiang chasm, be tempted by shear-slide in such areas as Guanghua, Gucheng, Shihuajie, the southeast of Danjiang chasm, in the line of Gonglu chasm; A series of small earthquakes were tempted by reservoir-water infiltration and shear-slide in such area as the periphery of Songwan, the periphery of Linmaoshan, the periphery of Danku, be temped by shear-slide in the line of Baokang and Yuan＇an, the line of Xiangyang and Zhongxiang, the line of Yunxian and Xijiadian.

关 键 词：水压应力场 地应力场 水库诱发地震 丹江口水库 

分 类 号：TU375.4[建筑科学—结构工程]