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采用高密度电法探测地下空洞时,由于受到地下空洞类型、地下电流分布等干扰因素的影响,常常会导致探测结果有所偏差.利用ANSYS对典型地下空洞地电模型进行了数值模拟,结果表明探测精度不仅与空洞埋深、电阻率值高低及相邻洞体间距有关,还与所采用的探测装置类型、电极间距等因素有关;还通过对实际煤矿采空区开展高密度电法的数值模拟,计算结果与现场实测结果基本一致,也证明将数值模拟技术与现场实测结果相结合,对于补充解释和准确判断地下空洞的分布具有较好的参考价值.
When using high-density electrical method to detect underground cavities, the detection results are often biased due to interference factors such as underground cavity types, underground current distribution, etc. The typical underground cavity geoelectric model is simulated by ANSYS and the results show that The accuracy of detection is not only related to the depth of buried cavity, the value of resistivity and the distance between adjacent holes, but also relates to the type of detecting device used and the distance between electrodes. In addition, the numerical value of high density electric method The results of simulation and calculation are basically the same with those of the field test. It is also proved that combining the numerical simulation technology with the field test results has a good reference value for supplementing explanation and accurately judging the distribution of underground cavities.