矿井瞬变电磁井下大型铁器干扰响应特征  

Transient Electromagnetic Response Characteristics of Large Iron Interference in Mine

作　　者：陈健强 李宏杰[1,2] 廉玉广 樊林林[3] 郝宇军 CHEN Jianqiang;LI Hongjie;LIAN Yuguang;FAN Linlin;HAO Yujun(Mine Safety Technology Research Branch of China Coal Research Institute,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization（China Coal Research Institute）,Beijing 100013,China;Jineheng Anthracite Mining Group Technology Research Co.,Ltd.,Jincheng 048006,China)

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013 [3]山西晋煤集团技术研究院有限责任公司,山西晋城048006

出　　处：《煤矿安全》2018年第10期139-142,共4页Safety in Coal Mines

基　　金：国家科技重大专项资助项目(2016ZX05045001-004);国家自然科学基金面上资助项目(51674142;51704162)

摘　　要：为从源头上提高巷道存在综掘机等大型铁器干扰条件下的矿井瞬变电磁法数据采集质量,采用三维有限元数值模拟、现场探测试验等手段,研究总结了大型铁器不同干扰程度下的瞬变电磁二次场响应特征和时空变化规律,得出了相应干扰规避措施。研究结果表明:对于综掘机等井下大型铁器,其近距离强干扰条件下的地层空间体感应电磁场会产生空间形态及时间分布的非均匀变化;大型铁器干扰响应对距离条件敏感,在现场有限后撤范围内,当距探测迎头4 m以外时,此类干扰影响可显著减弱,利于提高实际探测效果。To improve the data acquisition quality from the source under circumstance of interferences by using mine transient electromagnetic method, we adopted 3 D finite element numerical simulation and field tests to analyze the responsing characteristics and variation laws of the induced electromagnetic field under different levels of interference from large iron, summarized the measure to weaken corresponding interference. The study results showed that： under condition of close range and strong interference of large iron like roadheader, the induced electromagnetic field of strata would produce non-uniform changes in spatial form and time distribution; the interference responses were sensitive to distance condition, the detecting effect would improve when the distance between the large iron and the detecting coil is beyond 4 m.

关 键 词：矿井瞬变电磁法 三维有限元模拟 铁器干扰 地层空间体感应电磁场 响应特征 

分 类 号：TD752.2[矿业工程—矿井通风与安全]