摘要
覆岩破坏引起稳态电场特征发生变化 ,其主要变化的电性参数是电阻率。通过观测煤层开采前后覆岩电阻率参数变化 ,并根据计算及图形模拟结果 ,表明电阻率的变化反映了覆岩破坏的变化状况 ,据此 ,再按照电阻率变化幅度 ,可准确确定导水断裂带范围 ,为煤层开采提供可靠的地质依据 。
A coal mining will cause rock deformation and failure in overburden above coal seam. When the failure reached to a certain degree, water above the overburden will rush into the mine. The geophysics technology and method can be used for the study of overburden failure. The paper introduced the basic principle, working method and application case of the method. The method is mainly depending on the changes of the static electric field caused by the overburden failure and the main change is the electric resistance. With the measurements on the resistance parameter changes before and after the mining operation and base on the table and fig. results from the calculation of the measured data, the changes of the resistance rate can show the changes of the overburden failure. According the change of the resistance rate, a water inrush failure zone can be determined. This method has been successfully applied in Huainan Mining Area and the results of the practice have certified.
出处
《煤炭科学技术》
CAS
北大核心
2001年第4期18-19,22,共3页
Coal Science and Technology
