蒙西泊江海子矿3-1煤层掘进开拓超前探水应用

摘要

To detect the impact of coal roof sandy conglomerate pore water on the winning of coal seam No.3-1 in the Bojianghaizi coalmine, western Mongolia, the transient electromagnetic method is used in roadway excavation continuous tracking. According to geo-logical condition of coal No.3-1 driving, using side length 2m × 2m concentric multi-loop and fan-shaped observation system carried out detection. Every detection ought to predict strata water yield property 90-100m on the front, every 80m driving once more carry out next detection. The practices demonstrated that the mean resistivity of coal seams in the area is rather high, thus in favor of low-resistivi-ty anomalies identification. Taking less than 10Ω· m low-resistivity anomaly as the yardstick to interpret water rich zone in the area is identical to water dripping area found during driving.%为探测顶板砂砾岩层孔隙水对泊江海子矿开采3-1煤层的影响，采用瞬变电磁法进行巷道掘进连续跟踪探测。根据3-1煤层掘进的地质条件，采用边长2 m×2 m的多匝小线框同心回线装置、扇型观测系统进行探测。每次探测要求预报迎头前方90-100m岩层的富水状况，每掘进80m时进行下一次探测。探测实践表明，测区内煤层的平均电阻率较高，有利于低阻异常的识别；在该区以低于10Ω·m为低阻值异常区的判断标准解释的富水区，与掘进过程中出现滴水现象的区域完全吻合。