隐伏断裂扩展前兆探测新技术的研究  

A New Technique for Detecting the Spreading Precursor of Underground Concealed Fracture

作　　者：廖椿庭[1] 陈峰[2] 吴满路[1] 安金珍[2] 

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]北京大学地球物理系,北京100871

出　　处：《地球学报》2003年第5期453-458,共6页Acta Geoscientica Sinica

基　　金：国家自然科学基金 ( 4 9972 0 95 );国土资源部自由探索项目 ( 2 0 0 0 417)资助

摘　　要：本文介绍了探测隐伏断裂扩展前兆的技术方法和原理 ,该方法的特色是 :把岩体受力致裂电阻率变化的各向异性 ,与岩体裂隙扩展的水网络导电通路变化直接相联系 ,避开了地质体最复杂、最难确定的岩体破裂受力状态问题 ,建立用电阻率变化各向异性确定岩体主破裂扩展方向的定量关系。着重介绍该方法的室内大试件模拟试验的结果。试验结果表明 ,定量计算的电阻率变化的各向异性主轴方向 。This paper presents the method and principle of the technique for detecting the spreading precursor of underground concealed fracture. In this method, the anisotropy of resistivity variation resulting from the rock fracturing under loading is directly rela ted to the water network electric conduction channel variation caused by rock fissures. In this way, the most difficult and complex problem, i.e., the determination of stress state of rock fracturing, is avoided. The quantitative relationship is established between the main fracture spreading direction of rock and the anisotropy of the dynamic rock resistivity variation. This paper emphatically reports the results of big sample simulation experiments in laboratory. The experimental results indicate that the directions of principal resistivity changing anisotropy axes deduced from quantitative calculation are essentially identical with the main rupturing orientations of samples under loading.

关 键 词：岩石电阻率 电阻率各向异性 地质灾害 隐伏断裂 前兆探测 

分 类 号：P642.2[天文地球—工程地质学]