Research on Support Technique for Excavation Process of Deep Rock Mass

Abstract:

In the deep rock mass surrounding, rock burst, large deformation, zonal fracturing and phenomena like these may occur in the tunnel excavation process. When zonal fracturing happens, it is essential to reconsider the types of support, the boundary of support and the approach of tunnel excavation. In this paper, the control theory about the surrounding rock stability under high pre-existing stresses was researched, and the efficient support form which was the combination of high strength anchor bar and anchor cable was ascertained to be adaptive to deep tunnel excavation. According to the deformation and zonal fracturing mechanism of the surrounding rock, a comprehensive support program that combined intensive short anchor bars and long anchor cables was established, and the numerical simulation was carried out to verify the feasibility of the support form.

• Periodical: Applied Mechanics and Materials (Volumes 438-439)
• Pages: 1249-1252
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.438-439.1249
• Online since: October 2013
• Authors: Hong Xiao Wu, Song Lin Yue, Cun Cheng Shi, Xiao Hu, Cheng Chu, Wei Zhang
• Keywords: Deep Rock Mass, Numerical Simulation, Support Technique, Tunnel Excavation

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