环工作面三维直流电阻率法研究及应用

本文在矿井直流电法理论基础上，推导环工作面三维直流电法测量深度公式，得到环工作面三维直流电法记录点坐标位置.基于以上理论，建立了环工作面三维直流电法异常体模型，分析了环工作面三维直流电法二极装置、三极装置、四极装置异常体响应特征，得出环工作面三维直流电法各装置敏感度低的主要原因是缺少必要的数据采集点.为了提高环工作面三维直流电法分辨率，最大限度增加工作面内侧的采集数据点.基于以上原因本文提出了对角偶极装置采集模式及多装置的数据叠加反演处理方法，以增加工作面内采集数据点，提高三维勘探的精度.本文通过某矿8802工作面底板富水性探查实例，说明该方法的有效性.

Research and application of the 3D DC resistivity method with around working face

Based on the theory of the mine DC technique, this paper derives the formula of measuring depth of the 3D DC resistivity method with a round working face and determines coordinates of its recording points. Then, an anomaly body model of for the 3D DC resistivity method with such a working face is established, and the responses characteristics for the cases of pole-dipole, pole-pole and dipole-dipole are analyzed. It is found that the main reason for the low sensitivity of the 3D DC with a round working face is that the electrodes cannot be laid on the inside of the working face and the necessary data points are lacking. In order to improve the resolution of this method, it is necessary to maximize the number of data acquisition points inside the working face. In view of this point, this paper suggests a diagonal dipole mode for data acquisition and an inversion method for stacked data with multiple devices, so that the data collection points on the working face are increased to enhance the accuracy of 3D exploration. The effectiveness of the method is demonstrated by an example of water-rich exploration on the floor of the 8802 working face in a mine.