Construction method for rapidly passing through high-outburst mine underground gob through advanced bag pre-grouting

The invention relates to a construction method for rapidly passing through a high-outburst mine underground gob through advanced bag pre-grouting. Pressurized by a grouting pump, cement grout is filled into bags via a grouting pipe to form cylindrical cement columns around the contour of roadway extraction to support and reinforce the roof and the surrounding rocks of a roadway and further to forma layer of waterproof and stable bearing case on the surrounding rocks of the pre-excavated roadway; meanwhile, lapped sections can serve as advanced anchor bolts to achieve the aim of prolonging theself-stabilization time of the rocks, improving the self-stabilization capacity of the surrounding rocks of an excavated surface and limiting stratum loosened deformation. 本发明涉及种超前囊袋预注浆快速穿过高突矿井井下采空区的施工方法，可通过注浆泵的压力，将水泥浆液通过注浆管注入囊袋，可在巷道开挖的轮廓外形成圆柱状水泥柱，支护和加固巷道的顶板和两帮围岩，在预挖巷道周围围岩形成层止水、稳定的承载壳，同时，搭接段又可起到超前锚杆的作用，从而达到增加岩体的自稳时间，提高开挖面周围岩体的自稳能力，限制地层松驰变形的目的。