煤厚变化对电磁波透视探测的响应特征分析  

Analysis of Response Characteristics of Coal Thickness Change to Electromagnetic Wave Perspective Detection

作　　者：李果 LI Guo(National Energy Shendong Coal Group Co.,Ltd.,Ordos 017000,China)

机构地区：[1]国能神东煤炭集团有限责任公司,内蒙古鄂尔多斯017000

出　　处：《煤炭技术》2024年第8期139-143,共5页Coal Technology

基　　金：神东科研项目(E210100528)。

摘　　要：为确保工作面准备回采前,工作面煤厚变化情况探测的准确性,为分析煤厚变化对电磁波透视探测的响应特征,通过建立仿真数值模拟系统,对不同煤厚条件下电阻率比值影响关系开展研究,煤厚小于8 m时,煤厚变化能够灵敏反映场强值的变化,煤厚大于8 m时,煤厚变化引起场强变化直接关系不明显,需结合电阻率比值,同时分析相邻区域煤厚进行综合判断,才能更可靠圈定地质异常区,分析结果可为厚煤层电磁波透视法圈定地质异常区提供数据支撑。Before preparing for mining at the working face,it is necessary to accurately detect the change of coal thickness in the working face to ensure safe and efficient mining at the working face.In order to analyze the response characteristics of coal thickness change to electromagnetic wave perspective detection,a simulation numerical simulation system is established to study the relationship between the resistivity ratio under different coal thickness conditions.When the coal thickness is less than 8 m,the change of coal thickness can sensitively reflect the change of field intensity value.When the coal thickness is greater than 8 m,the direct relationship between the change of field strength caused by the change of coal thickness is not obvious.It is necessary to combine the resistivity ratio and analyze the coal thickness in adjacent areas to make a comprehensive judgment,so as to delineate the geological anomaly area more reliably.The analysis results can provide data support for the delineation of geological anomaly area by electromagnetic wave perspective method of thick coal seam.

关 键 词：电磁波透视 煤厚变化 场强衰减 地质异常区 综采工作面 

分 类 号：TD166[矿业工程—矿山地质测量]