中文摘要：

针对软岩巷道围岩稳定性问题,以地处区域构造大断层中的南阳坡煤矿巷道为例,提出使用预注浆复合支护新技术,建立“先勘探、预稳定、后施工、强加固、多保险、重测量、准反馈、再优化”的新施工理念。对注浆材料、锚杆规格等进行分析,现场锚杆轴力检测和围岩变形量监测证明了该支护技术的适宜性。结果表明,预注浆锚网喷U型钢架复合支护技术能有效地控制锚杆轴力和围岩变形;新施工理念比较实用,有助于保证巷道施工安全;聚氨酯类非水溶性注浆材料适合于遇水软化围岩的注浆防渗补强;巷道开挖沿纵向主动压力区大致处在25m范围左右,对于同一断面,巷道开挖对顶板的影响较大。

英文摘要：

Aiming at difficulties in solving stability of soft rock roadway, taking Nanyangpo Mine located in the regional tectonic fault zone as an example, the new technology of pre-grouting compound support was proposed, and establishing the construction concept of investigating first, prior stabilization, constructing afterwards, reinforcing strongly, multi insurance, focusing on measuring detection, feedback precisely, re-optimization. Then the grouting material and anchor specification were analyzed, and the feasibility was verified by anchor axial force detection and rock deformation monitoring. The results showed that pregrouting compound support technology with anchor-net-spray ＆ U-type steel frame can control axial force and rock deformation effectively. The new construction idea was useful to keep roadway construction safe. Polyurethane non-water-soluble grouting materia was better to solve the permeation and strength of soft rock. The active pressure area along longitude of roadway was about 25 m, and its influence on roof was more apparent.