| 隐伏断裂扩展前兆探测新技术的研究 |
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| 关键词:electric resistivity of rock anisotropy of resistivity main spreading direction of fracture geological hazard |
| 基金项目:国家自然科学基金(49972095)，国土资源部自由探索项目(2000417) |
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| 摘要: |
| A New Technique for Detecting the Spreading Precursor of Underground Concealed Fracture |
| 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. |
| LIAO Chun-ting,CHEN Feng,WU Man-lu,AN Jin-zhen.2003.A New Technique for Detecting the Spreading Precursor of Underground Concealed Fracture[J].Acta Geoscientica Sinica,24(5):453-458. |
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