覆岩变形破坏电阻率响应特征的模拟实验研究  

SIMULATION EXPERIMENT ON THE RESPONSE OF RESISTIVITY TO DEFORMATION AND FAILURE OF OVERBURDEN

作　　者：程久龙[1] 于师建[1] 

机构地区：[1]山东科技大学

出　　处：《地球物理学报》2000年第5期699-706,共8页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目!(59634 0 30 );煤炭科学基金项目!(92D1 0 50 9)

摘　　要：地下采矿活动引起上覆岩层移动变形和破坏 ,对覆岩变形破坏进行监测 ,可以为采矿设计和安全生产提供可靠的技术保障 .本文从对应于实际地层介质的相似材料物理模型实验出发 ,探讨了模拟实验的相似条件和可行性 ,进行了采矿活动不同时期覆岩电阻率特征变化的动态测试 ,结合实验数据进行反演计算 ,最后获得覆岩变形破坏与电阻率变化的响应关系 .实验结果表明 ,覆岩变形和破坏必然造成地层介质电性特征的变化 ,不同破坏带的破坏程度不同 ,电阻率变化响应特征不一样 ,两者是一一对应的 .利用电阻率方法监测覆岩变形和破坏是完全可行的 .Measurement the overburden deformation and failure caused by underground mining may provide reliable guidance for mining design and safe production. This paper deals with the similar conditions and the practicability of simulation experiment, makes the dynamic measurement of the electric field characteristics changes of overburden at different mining stages, makes inversion with the experiment data and uncovers the response of resistivity to overburden deformation and failure. The experimental results indicate that the overburden deformation and failure cause the electric characteristics change of strata, the response characteristic of resistivity changes vary with the failure degree in different failure zones. [

关 键 词：覆岩变形破坏 稳定电流场 电阻率 模型实验 测井 

分 类 号：P631.8[天文地球—地质矿产勘探]