采煤面隐伏陷落柱三维并行电法探测模拟与应用
Detection Simulation and Application of Three Dimensional Parallel Electric Method for Concealed Collapse Column in Coal Face

针对含水陷落柱与周围煤岩体之间存在明显的视电阻率差异，可以通过三维并行电法进行探查。文章以柱状模型代替陷落柱目标体，建立数学模型，通过构建不同地质参数的陷落柱模型进行数值模拟，并分析各模型的地电响应特征。结果表明含水陷落柱正演数据，在通过反演后，低阻异常区域迅速收敛，能够清晰地反映模型中含水陷落柱的分布范围，异常体与周围岩层有明显的电阻率差异，低阻区位置与模型预设的位置相对应。在正演结果中，单极–单极排列与单极–偶极排列方式相比，前者对于低阻区的定位及范围分布响应效果较好；在反演结果中，后者对于低阻区的收敛效果优于前者。在对某矿II6115面风联巷陷落柱探测中，利用三维并行电法技术探测陷落柱的赋存范围及其富水性，取得良好的效果。
In view of the apparent resistivity difference between the water-bearing collapse column and the surrounding coal and rock mass, the three-dimensional parallel electrical method can be used for exploration. In this paper, the cylindrical model is used to replace the target body of the collapse column, and the mathematical model is established. The numerical simulation is carried out by constructing the collapse column model with different geological parameters, and the geoelectric response characteristics of each model are analyzed. The results show that the forward modeling data of water-bearing collapse column converges rapidly after inversion, and can clearly reflect the distribution range of water-bearing collapse column in the model. There is an obvious resistivity difference between the abnormal body and surrounding rock strata, and the location of low-resistance area corresponds to the preset location of the model. In the forward results, the pole-pole arrangement has a better response to the localization and range distribution of the low resistance region compared with the pole-dipole arrangement; in the inverse results, the latter has a better convergence effect on the low resistance region than the former. In the process of detecting the collapse column in the air lane of II6115 face of a mine, the 3D parallel electrical method was used to detect the occurrence range and water abundance of the collapse column, and good results were obtained.