瞬变电磁法在煤矿富水性探测中的应用——以神东矿区大柳塔矿井五、六盘区为例

Application of transient electromagnetic method in coal mine water-rich detection:Taking the fifth and sixth panels of Daliuta Coal Mine in Shendong Mining Area as an example

探明煤矿采空区边界及积水情况是煤炭安全生产的前提。为查明采空区边界和富水情况,本文以神东矿区大柳塔矿五、六盘区为例,确定了瞬变电磁法的施工方法和工程布置情况,通过对煤层底板视电阻率顺层切片分析,同时结合测线多测道曲线及视电阻率拟断面图相对低阻异常区,对其平面和纵向分布情况进行了分析,共划分富水异常区7处,进一步推断和解释划分为采空区积水富水异常、顶板砂岩和构造裂隙发育等引起的富水异常3种类型。通过结果分析认为瞬变电磁法在确定低阻异常区中具有显著优势,能较好地对煤矿的富水性进行分析和评价,但会受到地表设施带来的电磁信号干扰且多解性。

Proving the boundary and water accumulation of coal mine goaf is the premise of coal safety production.In order to find out the boundary of the goaf and the water-rich situation,this paper takes the fifth and sixth panels of Daliuta Mine in Shendong mining area as an example to determine the construction method and engineering layout of the transient electromagnetic method.Through the analysis of the apparent resistivity bedding section of the coal seam floor,combined with the multi-channel curve of the survey line and the relative lowresistance anomaly area of the apparent resistivity pseudo-section map,the plane and vertical distribution are analyzed,and a total of 7 water-rich anomaly areas are divided.Further inference and interpretation are divided into three types of water-rich anomaly caused by waterrich anomaly in goaf,roof sandstone and structural fracture development.The results show that the transient electromagnetic method has significant advantages in determining the low resistivity anomaly area,and can better analyze and evaluate the water yield property of coal mine,but it will be interfered by the electromagnetic signal brough by the surface facilities and has multiple solutions.