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| Research on Anchor Net Technology of Soft Broken Roof Open-off Cut |
| LI Zeng-wei, HUI Xing-tian |
| School of Architecture and Civil Engineering,Xi’an University of Science and Technology, Xi’an 710054, China |
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Abstract 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.
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