瞬变电磁法在矿井采空区积水探测中的应用

Application of Transient Electromagnetic Method in Water Detection in Mined-out Area

探明采空区积水范围对确保邻近回采工作面开采安全具有重要意义。3103回风巷掘进时顶板淋水,根据现有资料判定,回风巷顶板淋水为上覆砂岩裂隙水及老采空区水。为确保3103回风巷掘进及后续采面回采安全,采用YCS111瞬变电磁仪对邻近老窑采空区积水范围进行探测。为提升探测结果的准确性,在已知富水区域、实体煤区域等进行瞬变电磁探测试验,从而掌握该矿3号煤层视电阻率规律。随后再对邻近3103回风巷进行瞬变电磁探测,圈定出3103工作面邻近老窑采空区积水边界,探测成果可为矿井后续采取疏排水措施提供指导依据。

It is of great significance to ascertain the extent of water accumulation in the mined-out area to ensure the mining safety of the adjacent mining face.The roof drenched during the excavation of 3103 air return way.According to the available data,the roof water leakage of air return way was overlying sandstone fissure water and old goaf water.In order to ensure the safety of the 3103 air return way driving and the subsequent mining face mining,the YCS111 transient electromagnetic instrument was used to detect the water accumulation range near the goaf.In order to improve the accuracy of the detection results,transient electromagnetic detection tests were performed in known water-rich areas,solid coal areas,etc.,so as to grasp the law of transient electrical resistance of No.3 coal seam of the mine.Then,the transient electromagnetic detection was carried out near the 3103 air return way,and the dewatering boundary of the goaf near the 3103 working face was delineated.The detection results provided guidance for the subsequent drainage measures adopted by the mine.