EH4大地电磁法在中深煤层采空区探测中的应用  

Application of EH4 magnetotelluric method in detection of goaf in medium and deep coal seams

作　　者：陈清通 徐慧 牟义 Chen Qingtong;Xu Hui;Mu Yi(Coal Science and Technology Research Institute Co.,Ltd.,Beijing 100013,China;State Key Laboratory of Coal Mine Disaster Prevention and Control,Beijing 100013,China;Beijing Engineering and Research Center of Mine Safe,Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司,北京100013 [2]煤矿灾害防控全国重点实验室,北京100013 [3]北京市煤矿安全工程技术研究中心,北京100013

出　　处：《能源与环保》2024年第4期69-75,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：中国煤炭科工集团基金重点项目(2019-ZD004);煤科院基金(2019CX-Ⅱ-13)。

摘　　要：为了查明鄂尔多斯棋盘井某矿916、917工作面附近区域采空区及积水分布情况,采用EH4大地电磁法对该区域进行了探测。通过了解该区域地形地质资料,分析电性响应特征,进行干扰试验和参数试验研究,然后进行现场施工布置,开展内业资料处理与分析,进行剖面和平面成果解释。结果表明,试验电极和磁棒一致性较好,确定采用电极距40 m、采集次数8次,增益大小根据测点实际信号确定;经过干扰信号的剔除、静态校正和合理解释,圈出1处弱高阻异常(不含水)和1处弱低阻异常(弱含水),分析均为断层破碎带,未发现明显的采空区及积水异常区,基本达到了预期探查目的。In order to identify the goaf and water accumulation distribution near the No.916 and No.917 working faces of a certain mine in Qipanjing,Ordos,EH4 magnetotelluric method was used to detect the area.By understanding the terrain and geological data of the area,analyzing the electrical response characteristics,conducting interference tests and parameter tests research,and then conducting on-site construction layout,conducting interior data processing and analysis,and interpreting the profile and plane results.The results showed that the consistency between the electrodes and magnetic rods was good after testing.It was determined to use an electrode distance of 40 m and 8 acquisition times,and the gain size was determined based on the actual signal size of the measurement point.After removing interference signals,static correction,and reasonable interpretation,one weak high resistance anomaly(without water content)and one weak low resistance anomaly(with weak water content)were circled.The analysis showed that both were fault fracture zones,and no obvious goaf or water accumulation abnormal areas were found.The expected exploration purpose was basically achieved.

关 键 词：EH4大地电磁法 中深煤层 采空区探测 积水区探测 

分 类 号：TD163.1[矿业工程—矿山地质测量]