摘要
现有的煤矿掘进工作面直流电和瞬变电磁物探技术随着探测半径的增加信号强度减弱,而钻探技术工作量又较大。在对现有的煤矿掘进工作面超前探放水和电磁场频率超前测深分析的基础上,提出了随钻钻孔电磁场频率超前测深方法,设计了随钻探测探头结构和电路,并进行了工业性试验研究。结果表明:基于电磁感应的趋肤效应,采用电磁偶极剖面法装置在消除一次场的同时,又具有较强的电磁效应,电磁场频率较低时,可探测较大半径范围内的煤岩体含水构造;电磁波频率较高时,可探测较小半径范围内的煤岩体含水构造;在钻探过程中,在钻头和钻杆之间安装随钻钻孔电磁场频率超前测深装置,可有效探测钻孔半径0~30 m范围内的煤岩体含水构造,提高了探测精度,且探放水设计钻孔数量减少了2/3,有效提高了掘进效率。
Based on the existing advanced detection technology of water-bearing structure and the principles of electromagnetic frequency in the coal mine working face,the signal strength decreased with the increment of detection radius and the workload of the drilling technology is large.The main contents were further studied which including in the water exploration and drainage and the advanced detection based on electromagnetic frequency.The advanced detection technology based on electromagnetic frequency was proposed.The probe detector and the probe circuit were designed,and the industrial experimental study was carried out.The results show that based on the skin effect of electromagnetic induction,the electromagnetic dipole profiling device not only eliminates the primary field,but also has strong electromagnetic effect.The lower the electromagnetic frequency,the greater the propagation distance and the larger the water-bearing tectonic radius.The high-frequency electromagnetic wave can detect the water-bearing structure of the roadway rock near the drill hole.The advanced detection based on electromagnetic frequency while drilling is installed between the drill bit and the drill pipe.It can effectively detect the water-bearing structure in the range of 30 m,the number of boreholes designed for water exploration and drainage has been reduced by 2/3,and the detection accuracy and the tunneling efficiency are effectively improved.
作者
张彦文
庞明鑫
武强
刘春生
ZHANG Yanwen;PANG Mingxin;WU Qiang;LIU Chunsheng(Jinneng Holding Group Co.,Ltd.,Datong 037000,China;National Engineering Research Center of Coal Mine Water Hazard Controlling,China University of Mining and Technology-Beijing,Beijing 100083,China;Wuhan Changsheng Meian Technology Co.,Ltd.,Wuhan 430312,China)
出处
《煤炭科学技术》
CAS
CSCD
北大核心
2022年第S02期231-236,共6页
Coal Science and Technology
基金
国家自然科学基金资助项目(42027801,41877186)
中央高校基本科研业务经费资助项目(2022YJSSH01)
关键词
含水构造
电磁场频率
超前探测
探放水
water-bearing structure
electromagnetic frequency
advance detection
water exploration and drainage
作者简介
张彦文(1970—),男,山西灵丘人,高级工程师。E-mail:59606636@qq.com
