摘要
为实现煤矿巷道超前探测,提出了一种基于双频激电法和电场扫描探测理论的矿用聚焦双频激电法超前探测技术。基于共线点电流源的电力线方程理论,推导煤矿巷道探测电场边界电力线方程算法;提出电场扫描探测策略,分析了电场扫描探测的实际分辨率;基于电介质边界条件,根据巷道地质结构模型推导电力线偏移向量求解公式,分析了地质异常体对电力线的影响。理论计算表明:通过连续改变探测仪各通道电流强度,探测电场扫描分辨率理论上可任意设定,实际探测由实际地质工况条件选定;地质异常体的存在会影响电力线分布,板状体的厚度越大或者围岩与板状体之间的电阻率比值越大或者板状体倾角越大,则电力线偏移向量横坐标与纵坐标的绝对值越大;通过电场聚焦和偏转扫描探测,可确定异常体的直径和方位。
To achieve an advanced detection in coal mine roadway,a method called focusing dual-frequency induced polarization method based on dual-frequency induced polarization method and electric field scanning detection theory was proposed in this paper. Based on the theory of collinear point current source electric line equation,the detection electric field boundary electric line equations were established and the complete algorithm was derived. The electric field scanning detection strategy was proposed and the actual resolution of electric field scanning detection was analyzed with the boundary electric line equation. Based on dielectric boundary conditions theory,the offset vector of the electric line was derived according to the roadway geological structure model,and the influence of geological anomaly on the electric line was analyzed. Theoretical calculations show that the detection electric field scanning resolution can be set arbitrarily by continuously changing the current amplitude of different channel of the detector theoretically,but it is set according to actual detection conditions. The existence of geological anomalies will affect the distribution of electric line and the greater of a,ρ1/ ρ2and β( β≥90°- α),the larger the absolute value of the offset vector of electric line. The size and orientation of the geological anomalies could be calculated through electric field deflection and focusing canning detection.
作者
刘希高
凌春晖
刘志民
张金涛
吕一鸣
周游
吴淼
LIU Xi-gao LING Chun-hui LIU Zhi-min ZHANG Jin-tao LU Yi-ming ZHOU You WU Miao(School of Mechanical Electronic & Information Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China Mechanical and Electrical Engineering Institute, Hebei University of Engineering, Handan 056038, China)
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2016年第9期2388-2395,共8页
Journal of China Coal Society
基金
高等学校博士学科点专项科研基金资助项目(20110023110008)
博士研究生拔尖创新人才培育基金资助项目(00800015Z6A1)
关键词
煤矿巷道
超前探测
聚焦双频激电法
电场扫描
探测分辨率
coal mine roadway
advanced detection
focusing dual-frequency induced polarization method
electric field scanning
detection resolution