煤矿巷道底板探测点源三极法模型模拟

Pole-dipole Array Method Modeling for Mine Tunnel Floor Detection

采用三维有限单元法对全空间点源场(含坑道空腔)的电位分布进行了计算分析。将点源三极法应用于煤矿巷道底板异常体探测,分析了巷道侧帮和顶板上方存在异常体时对探测结果的影响。结果表明,点源三极法可有效地反映煤矿巷道底板异常体的存在,旁侧异常体位于巷道侧帮时对底板目标体探测结果有一定影响,旁侧异常体位于巷道顶板上方时,对底板目标体探测的结果影响不大。在对点源三极法煤矿巷道底板探测的数据处理和解释,应考虑到巷道的影响,并做相应的改正处理。

Voltage distribution of point--source field and focused current field in full--space （with tunnel cavity） are analyzed using FEM. Using Pole--dipole array method in the detection for the abnormal body under coal mine tunnel floor. The results show that point source Pole--dipole array method can reflect the existence of abnormal body effectively, lateral abnormal body will have some influence for the detection of abnormal body under coal mine tunnel floor, while the abnormal body on the top of tunnel, there is nearly no effect on the detection results. When it comes to processing and interpretation for the data of detection, it is not appropriate for using of the existing technology for ground surface sounding directly, correction should be done.