工作面隐伏含水断层电透视异常特征模拟研究

Simulation study on electrical penetration anomalous features of hidden water-bearing fault in working face

为了给工作面电透视资料的处理解释提供参考依据,针对工作面隐伏含水断层建立地质模型,通过矿井电透视法三维数值模拟分析了典型断层构造的电性异常特征,经分别改变断层距离、尺寸及角度等模型参数进行了模拟计算,获得了不同参数下平行单极-偶极(装置1)和平行偶极-偶极(装置2)的条件下的电位差异常曲线。分析结果表明:根据异常曲线的形态、交汇特征及异常幅度可以判断含水断层相对接收测线和煤层底板的位置,还可以判断断层沿测线方向上的尺寸大小;根据异常曲线的倾斜方向可以识别断层走向,但还难以识别断层倾向;此外,装置1更加适用于长度较长工作面,装置2适用于长度较小工作面时效果更好。

In order to provide the reference basis to the processing and explanation of the electrical penetration information from the working face,according to the hidden water bearing fault,a geology model was established. The 3D numerical simulation of the mine electrical penetration method was applied to analyze the electric property abnormal features of the typical fault structure. The simulation calculation was conducted with individually changed fault distance,size and angle as well as other model parameters and the potential difference abnormal curve of the parallel monopole- dipole（ Device one） and the parallel dipole- dipole（ Device two） device was obtained under the different parameters. The analysis results showed that according to the abnormal curve shape,intersection features and abnormal amplitude,the fault location relative to receive survey line and the seam floor could be judged and the fault size also could be judged along the direction of the survey line.According to the inclined direction of the abnormal curve,the fault strike could be distinguished,but the fault inclination would be hard distinguished. In addition,the Device one would be more favorable applied to the wider working face and the Device two applied to the small wide working face would have a better effect.