煤矿垂向导水通道综合探测关键技术的研究

Study on Key Techniques in Coalmine Vertical Water Conducted Channel Integrated Prospecting

矿井瞬变电磁法常被用来探测煤矿垂向导水通道对奥灰带压巷道掘进危害,受巷道等条件的限制,均采用多匝小线圈进行发射和接收.由于存在线圈的自感和互感,造成瞬变电磁法早期的数据畸变,为此引入矿井瞬变电磁法的数据校正方法。通过巷道三个方向的瞬变电磁法探测,准确圈定了巷道迎头二个异常的位置。根据探查成果设计钻孔,结合孔中瞬变电磁法精准探明了裂隙带的发育规律,为注浆工程提供了准确的靶区,从而保障了巷道掘进的安全。

The mine TEM is usually used often in coalmine vertical water conducted channel prospecting to identify hazard from Ordovician limestone aquifer on heading under safe water pressure of aquifer. Limited by roadway and other conditions, mostly have to adopt multi-turn small loop to carry out transmitting and receiving. Because of loop self-induction and mutual induction can cause TEM early data distortion, thus has introduced mine TEM data adjustment method. Through roadway three directions TEM prospecting, exactly delineated position of roadway head-on two anomalies. On the basis of prospecting results have designed boreholes, combined with downhole TEM exactly found out fissure zone development pattern;provided accurate target area for grouting engineering;accordingly ensured roadway heading safety.