摘要
最近的研究表明,中频电磁波可在井下三层介质模型煤层中传播,传播特性主要取决于煤层及其围岩的电导率。本文介绍一种利用电磁波传播来测取三层介质模型煤层及其围岩电导率的方法,或称'比值一相位法'。通过实际测试表明,该方法不仅可以方便地用来确定煤层及其围岩的电参数,而且还具有其他的一些优点。
Recent studies have shown that medium frequency waves can propagate in a three-layer model of coal seam.The propagation characteristics of the waves mainly depend on both conductivities of the coal seam and surrounding rock.A new method of determining the conductivities by means of electro-magnetic wave propagation is described in this paper,which can be called'Amplitude-Phase Method'in short. By practical measurements it has been verified that the method can be easily used for determination of conductivities of coal seam and surrounding rock, and that this method has some advantages.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1990年第4期76-83,共8页
Journal of China Coal Society
关键词
电磁波
介质模型
矿井
电导率
EMW propagation
three-layer medium model
conductivity
