矿井瞬变电磁法在探查迎头前方构造中的应用

为探察矿井巷道掘进中的未知构造,防止瓦斯突出或突水事件,基于矿井瞬变电磁法全空间"烟圈效应"理论,根据巷道迎头周围空间有限和金属设施干扰大等探查环境,选择矿井瞬变电磁法进行超前探查巷道迎头前方地质构造,介绍了工作装置、探查技术及探查结果图形显示技术.实际应用表明,探查结果与巷道实际揭露情况基本吻合.

THE APPLICATION OF MTEM TO DETECTING STRUCTURES IN FRONT OF ROADWAY HEAD

Some unknown structures are always uncovered and gas outburst or water bursting can easily take place during the tunneling of mine roadways rich in gas or water, which seriously influences the safety in coal mine production. On the basis of the theory of whole space "smoking ring effect" of the mine transient electromagnetic method (MTEM) in roadway and according to the limited space around the roadway head and the exploration environment of the interference of other metal facilities, the authors chose MTEM to detect geological structures in front of roadway head, and systematically studied the detection devices as well as detection and graphical display techniques of advanced detection of MTEM in tunneling mine head. Practical application shows that the exploration results are well consistent with the uncovering situation of the roadway