Study on Deformation Mechanism of High Stress and Broken Roadway and its Controlling Measures

Abstract:

This paper researched the high press and broken drift deformation mechanism of 1424m filling roadway by theoretical analysis and on-site monitoring. Strengthening rock residual strength by improving roadway pressure contributed to enhancing drift stability. The roadway deformation could be controlled effectively with the method of improving rock self-carrying capacity. The monitoring results showed anchor supporting resistance and reinforcement depth were inadequate. And supporting method was not coordinate with rock deformation, which was the main reason of roadway deformation increasing gradually. Improving bolt pre-stress and increasing the anchoring range are the key to limit roadway deformation. And the support way should provide a greater supporting resistance. It recommends that the combination reinforcing method, "strong prestressed anchor + long cable+ grouting behind the surrounding rock" is appropriate for controlling the drift displacement, and it can save supporting costs 390 yuan per year for per meter drift compared with previous supporting way while reaching the same effect.

• Periodical: Applied Mechanics and Materials (Volumes 501-504)
• Pages: 1798-1803
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.501-504.1798
• Online since: January 2014
• Authors: Hai Bao Yi*, Wei Zhou Liu, Xi Liang Zhang, Hai Tao Yang, Hai Hua Yu, Long Fu Li
• Keywords: Anchor Support, Confining Pressure, Control Measure, High Stress and Broken Rock, Roadway Deformation Mechanism, Site Monitoring

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