新桥矿破碎围岩巷道“锚架注”支护技术应用

新桥矿南一采区运输上山穿过落差30 m、宽度140 m特大断层,断层带内岩体极其破碎。为了不影响施工安全和施工进度,巷道采用＂超前预注浆＋U29伸缩性封闭圆形钢棚＋锚网喷＂进行支护。5个多月后,两帮最大移近量达到216 mm,顶板最大下沉量为120 mm,底臌量约135 mm,采用这种支护技术有效维护了巷道的长期稳定。

Application of Anchor-shed-grout in Fractured Surrounding Rock Roadway in Xinqiao Mine

Rise entry in South 1st District of Xinqiao Mine passed through fault with fall of 30m and width of 140m,so the rock was extremely broken.In order not to affect the construction safety and progress, technology of combined supporting which included pre--grouting,U29 elasticity closed circular steel shed and anchor net spray was adopted. More than five months later,the maximum displacementof roadway＇s sides was 216mm and the amount of maximum subsidence of roof was 120mm. With using this support technology,the roadway kept long-term stable.