In order to solve severe roof separation and roof fall problems occurred in the excavation process of soft broken roof open-off cut,according to the concrete conditions of Heyang coal X502 open-off cut gateway, based on the theories of self -stabilized hidden arch, the drifting gateway technology of side guide hole twice driving for open-off cut was proposed, and the support parameters of open-off cut gateway were set up. The site monitoring and measured results showed that the support scheme controlled the stability of surrounding rock effectively, the soft broken roof open-off cut was achieved safety, the program played a guiding role for the follow-up open-off cut construction.
李增伟,惠兴田. 松软破碎顶板开切眼锚网支护技术研究[J]. 煤炭与化工, 2013, 36(8): 103-105,128.
LI Zeng-wei, HUI Xing-tian. Research on Anchor Net Technology of Soft Broken Roof Open-off Cut. CCI, 2013, 36(8): 103-105,128.