瞬变电磁法勘探在煤层采空积水区的应用

山西翼城某矿在巷道掘进时,发现煤壁挂汗,巷道渗水等现象,疑为采空破坏区。为查明勘探区内是否存在采空破坏区及导水断层、陷落柱等构造,圈定煤层积水区及其范围,对该区进行了瞬变电磁法勘探。数据采集使用美国ZONGE公司的GDP-32II电法仪器,采用大定源中心回线方法施工测线11条,经资料处理和解释,在勘探区内没有发现较大的断层和陷落柱,仅在勘探区西南角一处推断存在采空区(积水),另外圈出3处富含水区,3处含水区。该勘探成果为解决矿井建设和开采中的地质难题,提供了可靠的地质信息。

Application of Transient Electromagnetic Method in Coal Seam Worked-out Ponding Zone

During the drifting in a coalmine in Yicheng, Shanxi, phenomena of rib sweating, roadway water percolating are suspected of from gob areas. To identify if the gob area, water conducted Zone, subsided column are existed in the exploration area, cycle out ponding zone and range, the transient electromagnetic method is used. The US Zonge GDP-32II multifunction receiver is used in data acquisition, total 11 traverses were measured through large fixed-source central loop method. After data processing and interpretation, large faults and subsided columns have not been found, only one （water ponding） gob area has found in southwest comer of the exploration area, in addition, 3 water-rich zones and 3 water-beating zones cycled out. The results can provide reliable geological information to solve geological hard nuts in coalmine construction and coal mining.