Design and Field Test of Bolt-Mesh-Cable Support of Extraction Drift in Soft Thick Seam with a Large Angle

Abstract:

Considering the poor support results of extraction drift in soft thick seam with a large angle in Dujiacun Mine, and there’s no similar design in such engineering geological conditions. Firstly, determined surrounding rock stability classification of the drift and obtained that roadway surrounding rock of this mine is type. According to the approximate range of this type roadway surrounding rock, selected parameters of bolt support, then using FLAC^3D software simulated support effect of the roadway with different parameters of bolt support, analyzed the extent of the support effect of various parameters. The simulation results show that the optimal program is φ2200mm round steel bolt in the roof andφ2500mm equal strength thread steel in the two sides. Monitoring results of ground pressure displacement of surface, load of bolt and amount of roof separation show that bolt-mesh-cable support is safe and effective.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 3565-3571
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.3565
• Online since: May 2011
• Authors: Dong Ming Guo, Jing Zhao Zhuang, Yi Zhang, Yan Bin Wang, Ren Shu Yang
• Keywords: Bolt-Mesh-Cable Support, Ground Pressure Monitoring, Large Angle, Simulation, Soft Thick Seam

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