摘要
由于煤矿不断向深部开采,很多煤矿出现了不同深度、不同层次的采空区,而且大部分采空区还存在积水,给煤矿的安全生产带来隐患。为了提高瞬变电磁法对各类采空区的探测精度,建立了高、低阻电性不同的双层采空区组合以及同一开采水平面相邻采空区组合的电性模型进行数值模拟,研究它们在不同层间距或不同水平距离下的电磁场响应规律。结果表明:双层采空区的存在会使瞬变电磁响应变得复杂,增大解析难度;瞬变电磁法易于穿透高阻层,下层采空区的响应容易受到上层低阻屏蔽的影响;瞬变电磁法能够分辨一定层间距的高阻-低阻双层采空区,其他双层采空区难以分辨;瞬变电磁法容易分辨相邻采空区,不同电性的相邻采空区分辨能力也有所不同。
As coal mines continue to mine deep,many coal mines have goafs at different depths and levels,and most of the goafs are water filled,which brings hidden dangers to coal mine safe production.To improve the detection accuracy of various mined-out areas by transient electromagnetic method,an electrical model of two-level mined-out area was established in two combinations,i.e.,the combination of different high-and low-resistance electrical properties and the adjacent mined-out area,and the combination of adjacent goafs in the same mining level,to study their electromagnetic field response at different layer spacings or different horizontal distances.The results show that the existence of double-layer goaf can complicate the transient electromagnetic response and increase the difficulty of analysis.The transient electromagnetic method is easy to penetrate high resistance,and the response of the lower goaf is easily affected by the upper low-resistance shielding.The transient electromagnetic method has higher lateral resolution for complex goaf than longitudinal resolution.
作者
程辉
余传涛
韩玉林
王慧明
杨晓成
杨勇
CHENG Hui;YU Chuan-tao;HAN Yu-lin;WANG Hui-ming;YANG Xiao-cheng;YANG Yong(College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Yangquan Coal Industry(group)Co.,Ltd.,Yangquan 030001,China)
出处
《科学技术与工程》
北大核心
2021年第6期2262-2268,共7页
Science Technology and Engineering
基金
山西省自然科学基金(201901D111045)
阳煤集团2018年科研项目(GY18026)。
关键词
多种采空区
瞬变电磁法
探测精度
数值模拟
multiple goafs
transient electromagnetic method
detection accuracy
numerical simulation
