频率域电磁法在煤矿采空区调查中的应用  

Application of fdem in detecting coal mined-out areas

作　　者：姜国庆[1,2] 贾春梅[3] 谭强[4] 尚通晓[1,2] 朱首峰[1,2] 

机构地区：[1]国土资源部地裂缝地质灾害重点实验室,江苏南京210018 [2]江苏省地质调查研究院基础地质研究所,江苏南京210018 [3]中国石油化工股份有限公司石油物探技术研究院,江苏南京211103 [4]西北核技术研究所,陕西西安710024

出　　处：《物探与化探》2015年第3期646-650,共5页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金重点项目(51034003)

摘　　要：采取有效技术手段进行煤矿采空区调查已成为矿区生态环境治理、矿井安全生产和重大工程建设项目选址中亟需解决的问题。本文以频率域电磁法基本原理为基础,对比分析EH-4电导率成像系统和可控源音频大地电磁法(CSAMT)的方法特点,通过数值模拟探讨不同介质充填采空区的电性响应特征,并结合典型工程实例对EH-4电导率成像系统和可控源音频大地电磁法探测煤矿采空区的实际应用效果进行分析。数值模拟结果和工程实践表明,煤矿采空区相对围岩具有显著的电性差异,以此为物性基础采用频率域电磁法进行采空区探测可以取得较为理想的效果。频率域电磁法在探测煤层采空区方面是一种行之有效的方法,可以成为煤矿防治水和采空区地质灾害调查的有效技术方法。Detecting coal mined?out areas with effective measures has been major issue to be addressed in mining area environment management, mine safe production and major construction projects site selection. Based on the fundamental principle of frequency do?main electromagnetic method (FDEM), method characteristics of EH?4 and CSAMT was compared and analyzed, electrical character?istic of mined?out area filled with different materials was analyzed through numerical modeling, and practical detecting effect was dis?cussed by typical project cases of EH?4 and CSAMT. Numerical modeling result and engineering practice prove that compared with sur?rounding rock mined?out area has prominent electrical difference, and base on this physical property mined?out area detecting with FDEM can obtain ideal effect. FDEM is an effective method in detecting coal mined?out area and it has already been an effective tech?nological means in coal mine water prevention and control and geological disaster survey of mined?out area.

关 键 词：煤矿采空区 地球物理特征 频率域电磁法 探测效果 

分 类 号：P631.325[天文地球—地质矿产勘探]