煤矿水害井下瞬变电磁实时成像系统  

Underground transient electromagnetic real-time imaging system for coal mine water hazard

作　　者：张龙 ZHANG Long(Shanxi Coking Coal Huozhou Coal Electricity Hongya Coal Industry Co.,Ltd.,Linfen 041000,China)

机构地区：[1]山西焦煤霍州煤电洪崖煤业有限公司,山西临汾041000

出　　处：《陕西煤炭》2024年第12期99-103,共5页Shaanxi Coal

摘　　要：瞬变电磁法具有灵敏度低、操作简单等优点,是目前采煤灾害水体超前探测中应用最广泛的物探方法。为实现实时成像,研制了一种基于电子罗经的无线天线姿态角测量仪,实时测量天线姿态角。根据通过WiFi发送给瞬变电磁实时成像仪主机的姿态角信息,实现电流传输、信号采集和天线转角信息的实时成像。研究了基于双对数变换分段最小二乘拟合的重叠环路模式下全空间瞬变电磁场视电阻率的直接算法,既保证了精度又加快了计算速度。在某煤矿进行了现场检测,检测结果与钻孔结果基本一致。The transient electromagnetic method has the advantages of low sensitivity and simple operation,and is currently the most widely-used physical exploration method in the advanced detection of water bodies in coal mining disasters.In order to realize real-time imaging,a wireless antenna attitude angle measuring instrument based on electronic compass was developed to measure the antenna attitude angle in real time.According to the attitude angle information sent to the host of the transient electromagnetic real-time imager via WiFi,the current transmission,signal acquisition and real-time imaging of antenna angle information are realized.The direct algorithm of full-space transient electromagnetic field apparent resistivity in overlapping loop mode based on double logarithmic transformation segmented least squares fitting is studied,which both ensures the accuracy and accelerates the calculation speed.The on-site detection is carried out in a coal mine,and the detection results are basically the same as those of the drilling.

关 键 词：瞬变电磁法 视电阻率 分段双对数变换 最小二乘拟合 

分 类 号：TD741[矿业工程—矿井通风与安全] TD745