基于有效介质理论的煤岩界面识别方法研究  

Study on recognition method of coal and rock interface based on effective medium theory

作　　者：程园新 韩楠楠 丁恩杰[1,2,3] 赵端 王昕[1,2,3] 

机构地区：[1]中国矿业大学信息与控制工程学院,江苏徐州221116 [2]矿山互联网应用技术国家地方联合工程实验室,江苏徐州221116 [3]中国矿业大学物联网(感知矿山)研究中心,江苏徐州221116

出　　处：《煤炭科学技术》2017年第10期123-128,共6页Coal Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2014CB046305);江苏省产学研联合创新资金前瞻性联合研究资助项目(BY2015023-04);江苏省研究生培养创新工程资助项目(KYLX_1385)

摘　　要：为解决目前依靠人工进行煤岩界面识别存在的问题,研究煤岩界面的自动识别技术,依据煤岩介电特性的差异,利用Bruggeman有效介质理论,建立基于煤含量检测的煤岩分界模型,并以煤岩混合介质粉末为例,进行试验验证。通过模拟煤含量实时变化的煤岩混合介质,实时地获得煤岩混合介质的相对介电常数,利用上述模型进行混合物煤含量的计算,并与阈值进行比较,判定采煤机截割状态。测试结果表明:在0.01~30 MHz的检测频率内,煤岩混合介质的煤含量均能通过此方法计算得到,在0.5~30 MHz内,理论煤含量与实际煤含量的相对误差较小,平均可控制在2.60%以下。该模型的计算结果均可以较准确地识别煤岩界面,为实现井下无人化开采提供一种新的煤岩识别方法。In order to solve the present problems existed in the coal-rock interface recognition by labor,an automatic recognition technology of the coal-rock interface was studied. According to the differences of the coal and rock dielectric characteristics,the Bruggeman effective medium theory was applied to establish the coal-rock boundary model based on the coal content detection. Based on the coal-rock mixed medium powder as an example,a test was conducted for the verification. With a simulation on the real-time varied coal-rock mixed medium of the coal content,the relative dielectric constants of the coal-rock mixed medium were real timely obtained. The model was applied to the calculation on the coal content of the mixture and a comparison to the threshold value was conducted. Thus the cutting status of the coal shearer was judged. The test results showed that within the test frequency of 0.01 ~ 30 MHz,the coal content of the coal-rock mixed medium all could pass the obtained value calculated with the method. Within the frequency of 0.5 ~ 30 MHz,there would be a small relative error between the theoretical coal content and the actual coal content and could be controlled below 2.60% in average. The calculation results of the model all could accurately recognize the coal-rock interface and could provide a new coal-rock recognition method to realize a minerless mining in the underground mine.

关 键 词：介电特性 Bruggeman有效介质理论 煤含量 煤岩识别 

分 类 号：TD803[矿业工程—矿山开采]