深切峡谷地区地壳浅表层地应力状态变化分析  

An analysis on variation of crustal stress states at the shallow part of upper crust in deep-cut valley region

作　　者：谭成轩[1] 孙炜锋[1] 张春山[1] 吴树仁[1] 彭华[1] 孙叶[2] 

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]中国地质科学院城市与工程场地稳定性研究中心,燕郊056201

出　　处：《地球物理学进展》2007年第4期1353-1359,共7页Progress in Geophysics

基　　金：国土资源部百名人才计划;中国地质调查局项目"三峡水库引水工程秦巴地壳稳定性调查评价"联合资助

摘　　要：本文以三峡水库引水工程秦岭特长隧洞水压致裂地应力测量为例,在野外地质调查、室内超前预测分析、现场和室内测试等的基础上,对深切峡谷地区地壳浅表层地应力状态进行了系统分析,结果表明深切峡谷地区地壳浅表层分为应力降低区、应力增高区和原始应力区,原始应力区(即构造应力面)的深度大致等于地应力测点周围山体和沟谷之间的相对高差.Taking the hydr-fracturing geo-stress measuring of Qinling long deep buried tunnel in the water diversion planning project from Yangtze River to Weihe River as an example, on the basis of field geological investigation, of flee pre-forecast analysis, in-situ and office measuring and so on, the crustal stress states at the shallow part of upper crust in deep-cut valley region are systematically analyzed in this paper. The results show that there are crustal stress reduction zone, crustal stress concentration zone and primary crustal stress zone in the shallow part of upper crust in deep-cut valley region, and that the depth of primary crustal stress zone （or tectonic stress plane） is about the relative height difference between the summit of mountain and the bottom of valley near a geo-stress measuring site.

关 键 词：深切峡谷 地壳浅表层 地应力状态 水压致裂地应力测量 构造应力面 

分 类 号：P631[天文地球—地质矿产勘探]