矿井孔-巷无线电磁波透视探测方法  

Research on radio electromagnetic wave perspective detection method through borehole-roadway in mine

作　　者：张军 ZHANG Jun(Xi’an Research Institute of China Coal Technology & Engineering Group Corp.,Xi’an 710077,China)

机构地区：[1]中国煤炭科工集团西安研究院有限公司,陕西西安710077

出　　处：《煤炭学报》2020年第8期2856-2864,共9页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2017YFC0804103);“十三五”国家科技重大专项资助项目(2016ZX05045-003-05)。

摘　　要：为了提高无线电磁波透视技术的探测精度,并且使该方法能够在独头巷道进行使用,确保煤矿的安全高效的开采。研究了采用了矿井巷道发射,钻孔接收电磁波信号的方式,借助钻孔岩层的屏蔽作用,在降低接收信号的外部干扰的同时,开拓了无线电磁波透视技术新的使用方法,即孔-巷无线电磁波透视的探测方法。分析了传统无线电磁波透视探测方法的特点及探测过程中存在的主要问题,根据目前矿井探测地质任务的要求,提出了适用于复杂地质条件下的孔-巷无线电磁波透视探测方法。研究了孔-巷无线电磁波透视的基本理论,认为无线电磁波透视探测准确性与电磁波入射角度有关,无线电磁波透视的衰减系数与煤(岩)层电导率、介电常数有关;研究了适用于孔-巷无线电磁波透视的专用接收天线装置,研究了适用于孔-巷无线电磁波透视的施工布置方法;以掘进巷道与钻孔结合的地质模型为例,通过模拟分别研究电磁波在煤层中遇到断层和陷落柱时的波场特征及信号响应规律,研究电磁波对地质异常的响应特征。发现孔-巷无线电磁波透视的探测方法与传统矿用无线电磁波透视相比适用范围更广,并且能够更加精确的探测隐伏构造的赋存情况。现场试验和验证情况表明,矿井孔-巷无线电磁波透视技术能够更精准的反映地质异常的位置,可有效开展独头巷道中的地质探测任务。In order to improve the detection accuracy of the wireless electromagnetic wave perspective technology,make the method to be used in the single heading,and ensure the safe and efficient mining operation,this paper studies the way of transmitting and receiving the electromagnetic wave signal in the mine roadway.With the shielding effect of the rock strata in the borehole,the external interference of the received signal is reduced,which can be used to develop a new detection method using the wireless electromagnetic wave perspective technology from borehole to roadway.This paper analyzes the characteristics of the traditional wireless electromagnetic wave perspective detection method and the main problems existing in the detection process.According to the requirements of the current geological task of mine exploration,a borehole to roadway wireless electromagnetic wave perspective detection method suitable for complex geological conditions is proposed.This paper studies the basic theory of borehole to roadway radio electromagnetic wave perspective,considers that the accuracy of radio electromagnetic wave perspective detection is related to the incident angle of electromagnetic wave,and the attenuation coefficient of radio electromagnetic wave perspective is related to the conductivity and dielectric constant of coal(rock)layer,studies the special receiving antenna device suitable for borehole to roadway radio electromagnetic wave perspective,and studies the construction suitable for borehole to roadway radio electromagnetic wave perspective layout method.Taking the geological model of combination of heading and borehole as an example,the wave field characteristics and signal response laws of electromagnetic wave when it encounters faults and collapse columns in coal seam are studied respectively through simulation,and the response characteristics of electromagnetic wave to geological anomalies are studied.It is found that the detection method of borehole to roadway radio electromagnetic wave perspective is more app

关 键 词：无线电磁波透视 钻孔-巷道 构造探测 岩层屏蔽 传播规律 

分 类 号：P631.3[天文地球—地质矿产勘探]