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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.
In order to make the shearer drum along the coal-rock interface mining, using the GPR method to detect the coal-rock interface.The stratified medium model of the coal-rock interface was established and the radar wave scattering law was analyzed in this model , A calculation method of radar echo intensity at coal-rock interface is proposed and a large number of numerical simulations are carried out to analyze the influence of coal-rock electrical parameters and antenna on the detection depth. The results show that under 1GHz, the measured values can be in good agreement with the theoretical values.In the coal and rock sample combinations listed in the text, the range of probable coal seams is 0.3 ~ 8.0m. The method can be used to calculate the coal seam thickness and provide the basis for the choice of antenna in practical application.