煤岩散射特性对探地雷达探测煤岩界面的影响  

Effects of coal-rock scattering characteristics on the GPR detection of coal-rock interface

作　　者：王昕[1] 丁恩杰[1] 胡克想[1] 赵端[1] 

机构地区：[1]中国矿业大学物联网(感知矿山)研究中心信息与电气工程学院,江苏徐州221116

出　　处：《中国矿业大学学报》2016年第1期34-41,共8页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展计划(973)项目(2014CB046300)

摘　　要：为了让采煤机滚筒沿着煤岩分界面开采,采用探地雷达方法进行煤岩界面探测.建立了煤岩界面的分层介质模型,结合雷达方程分析了雷达波在该模型中的散射规律,提出了煤岩界面雷达回波强度计算方法,并进行了大量的数值仿真,分析了煤岩电参数和天线对探测深度的影响.利用LTD-2100型探地雷达在郭庄煤矿进行了相关验证,并对相关数据做出分析.结果表明：在1GHz以下,测试数值可以较好的和理论数值吻合.在文中所列的煤岩样本组合中,可探煤层深度范围为0.3~8.0m.使用该方法可以实现煤层厚度的计算,并为实际应用中天线的选择提供了依据.The ground penetrating radar（GPR）was used in order to make the shearer drum cut along the coal-rock interface.First,aphysical model of coal-rock interface was established to study the scattering law of radar wave in the coal seam through the radar equation.The intensity calculation of radar echo wave reflected from the coal rock interface was proposed.A number of numerical simulations were made to study the effects of coal-rock electrical parameters and antenna on the coal-rock interface detection.The LTD-2100 GPR was used as an experiment tool to verify the presented method in Guozhuang coal mine and the relevant GPR data was analyzed.The results show that the experimental data can be well fitted to the theoretical data.In the coal-rock combination samples listed in the paper,the detectable depth of coal seam ranges from 0.3—8.0mbelow 1GHz.It is feasible to calculate the thickness of the coal seam and provide the basis for antenna selection by using the method.

关 键 词：探地雷达 分层介质 煤岩界面 煤层厚度 电参数 

分 类 号：P631.3[天文地球—地质矿产勘探]