矿井直流电法超前探中巷道影响的数值模拟

详细信息

Roadway influences on advanced DC detection in underground mine

1. Xi'an Research Institute, China Coal Technology & Engineering Group Crop, Xi'an 710077, China;
2. College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China

摘要: 影响井下直流电法超前探测效果的因素较多，巷道空腔对全空间电流场分布的影响就是其中之一。论述了有限单元法模拟井下稳定电流场正演模型，介绍了全空间条件下三维模型中的点源电场的边值及变分问题；模拟在巷道内加载定点电流源，通过巷道影响因子研究巷道空腔对全空间稳定电流场分布的影响。数值模拟结果表明，巷道影响与巷道几何尺寸大小、供电电极布置及巷道围岩导电性有关。
- 电阻率法 /
- 三维模拟 /
- 超前探测 /
- 巷道影响
Abstract: The paper focuses on simulating the forward modeling of steady electric currents down the hole by means of finite element method systematically. Firstly, the boundary values and variable problem of the electric field caused by a point source in 3D models of full space are given. Fixed electric point source in roadway was simulated in roadway. The influence of roadway space on the distribution of full space steady electric field was studied through influencing factors of roadway. The results of numerical simulation indicate that the roadway influences are related to the geometrical dimension of roadway, the location of current electrodes and the conductivity of surrounding rocks.
- resistivity method /
- 3D simulation /
- advanced detection /
- roadway influences