High geo-stress distribution and high geo-stress concentration area models for eastern margin of Qinghai-Tibet plateau

作     者：HUANG RunQiu,WANG YunSheng,WANG ShiTian & LI YuSheng State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection,Chengdu University of Technology,Chengdu 610059,China 

作者机构：State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection Chengdu University of Technology 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2011年第54卷第S1期

页      面：154-166页

核心收录：

学科分类：0810[工学-信息与通信工程] 0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China and Ertan Hydropower Development Company Ltd.(EHDC)(Grant No.50539050) 

主　　题：high geo-stress geo-stress concentration model regional geo-stress distribution Qinghai-Tibet plateau 

摘      要：High geo-stress and its engineering problems have severely affected the development of civil infrastructures in western China. The problems include high rock slope instabilities,rock burst,gas explosion and large-scale soft rock deformation in deep *** paper investigates the distribution of the high geo-stresses and the models of the stress concentration areas in the eastern margin of Qinghai-Tibet plateau so that a solid foundation can be formed to address the *** investigation is based on a comprehensive analysis of the previous research data of the eastern margin and uses remote sensing techniques,geophysics,geochemistry,and large scale geological surveying *** investigation has found that some special tectonic zones have high *** high geo-stresses are located at(1) the convergent boundary areas between two fault blocks with large strength differences,(2) the tectonic necks in front of active fault blocks,and(3) the intersection and/or termination areas of faults within the fault *** example for(1) is the north Qilian high geo-stress *** example for(2) is the Minshan high geo-stress area in the northwest ***,the investigation has summarized six basic models to characterize the high geo-stress concentration *** first one is the convergent stress concentration model at the boundary of two fault *** other five stress concentration modes are oblique fissures or intersecting areas,areas without lower velocity layer in the crust,areas of compression induced tensile cracking,tectonic wedge areas,and tectonic neck areas,respectively.