CSAMT在我国淮北某煤矿防治水工程中的应用

Application of CSAMT in Water Control Project of a Coalmine in Huaibei

淮北某煤矿,受矿区构造控制,被划分为三个采区,其中南部采区为一独立的水文地质单元,其松散层"新生界四含"水直接威胁到矿井的安全生产。为此需查明"新生界四含"的赋水情况。在该矿区,相对瞬变电磁法,可控源音频大地电磁法可有效克服能量衰减迅速、分辨率较低的问题。经过试验,确定了该区收发距参数及52个工作频点。通过测区2个钻孔点与140测线视电阻率剖面图的对比,验证了本次勘探数据采集、处理、解释的方法选取准确。结合勘探区内已知水文地质情况,利用统计学原理确定了含水异常划分阈值。据此推测"新生界四含"富水区分布范围及其间水力联系。

Because of mine area structural control, a coalmine in the Huaibei has been partitioned into 3 winning districts. Among them, the south winning district belongs to an independent hydrogeological unit. Its "Cenozoic 4th aquifer" in loose beds can directly threat coalmine safety in production. Thus the water-bearing situation of the aquifer should be proven. In the mine area, relative to TEM method, the CSAMT method can effectively overcome issues of rapid energy attenuation, lower resolution. After test, T-R spacing parameters and 52 operating frequency points in the area have been determined. Through 2 boreholes and prospecting line No.140 apparent resistivity section comparison have verified the selection of prospecting data acquisition, processing and interpretation methods are correct. In consideration of known hydrogeological situations in prospecting area, using statistical principles have determined water-bearing anomaly classification thresholds. Accordingly, the author has inferred "Cenozoic 4th aquifer" water-rich zones distribution and hydraulic connections among them.