瞬变电磁法在煤层超前勘探中的应用  

Application of transient electromagnetic method in coal seam advanced exploration

作　　者：张义安 Zhang Yi′an(Ordos Guoyuan Mining Development Co.,Ltd.,Ordos 017000,China)

机构地区：[1]鄂尔多斯市国源矿业开发有限责任公司,内蒙古鄂尔多斯017000

出　　处：《能源与环保》2023年第3期81-85,共5页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家科技基金项目(2017YBN0615012)。

摘　　要：为明确矿井掘进巷道工作面富水状况,预防矿井水害的产生,使用瞬变电磁法勘探井下含水异常体空间方位及分布面积。分析瞬变电磁法操作原理,通过增多线圈匝道模式扩大发射磁矩与有效接收面积,调节线圈和巷道底板角度改变法线位置,绘制电阻率等值线剖面图,综合已有地质材料即可了解煤矿富水异常情况。以龙王沟煤矿工程为例进行实例分析,该矿区总体呈现含水性低的特征,巷道掘进工作面底板23~60 m与掘进面右前方12~40 m区域,拥有不同程度的低阻异常与高阻异常,与真实工程钻探验证结果基本相同。研究结果表明,瞬变电磁法可以分析煤矿掘进工作面积水区的有效性,为矿区安全生产提供科学精准的地质信息。In order to make clear the water-rich condition of drifting face and prevent mine water damage,transient electromagnetic method is used to explore the spatial orientation and distribution area of water-bearing anomaly.This paper analyzes the operation principle of transient electromagnetic method,enlarges the emission magnetic moment and effective receiving area by increasing the coil ramp mode,adjusts the angle of the coil and the tunnel floor to change the normal position,draws the resistivity isoline profile,and integrates the existing geological materials to understand the abnormal situation of coal mine water enrichment.Taking Longwanggou Coal Mine Project as an example,the following results can be obtained:the mining area is generally characterized by low water content.The bottom plate of the roadway excavation face at 23~60 meters and the area at 12~40 meters to the right front of the excavation face have varying degrees of low and high resistance anomalies,which are basically the same as the verification results of real engineering drilling.The above results show that the transient electromagnetic method can analyze the effectiveness of the water area of the coal mine excavation work area,and provide scientific and accurate geological information for the safety production of the mining area.

关 键 词：瞬变电磁法 煤层掘进 含水状况 超前勘探 电阻率 

分 类 号：TD745[矿业工程—矿井通风与安全]