矿井瞬变电磁法在探测顶板老空区中的应用

以巷道掘进头超前探测顶板上层煤采空区为例,通过采用矿井瞬变电磁法超前探测技术,在巷道掘进头进行超前数据采集,进行数据处理、反演计算等,形成巷道掘进头顶板视电阻率剖面图,解释了巷道掘进头上层煤采空区的范围和位置特征,该超前探测方法拓展了超前探测的范围,建立了一套适合煤矿采掘过程中超前全方位探测的技术方法.结果表明:矿井瞬变电磁法拓展了传统矿井物探方法的探测范围,实现了矿井全方位的超前探测,不仅能探测前方,对顶、底板以及侧帮都有较好的探测效果；矿井瞬变电磁法不仅可以反演形成剖面图,还可以形成不同探测角度的顺层切片图,实现了多角度立体探测.

Application on Transient Electric Magnetic Method in Roof Goaf Detection of Coal Mine

The article takes advanced detection of the roof upper coal goaf in the tunnelling end as example,by adopting advanced detection technology of transient electric magnetic method of coal mine,carrying out the advanced detecting data collect in the tunnelling end,data handling,inverse calculation and etc.,forms the apparent resistivity section chart of the tunnelling end roof,explains the range and location characteristic of the upper coal goaf in the tunnelling end.The advancing detection method open up range of the advancing detecting,has built a set of the technology method of being suitable to the all-direction advancing probing in mining and digging process of coal mine.Result is indicated that transient electric magnetic method of coal mine has open up the tradition detecting range of geophysical prospecting in coal mine,has realized the all-direction advanced detecting,not only the front,but also the roof,the floor and the side have better probing effect.Transient electric magnetic method of coal mine has not only inverse calculation to sectional drawing,also can form tier section pictures of the different probing angle,realize multi-angle stereoscopic detecting.