Title of Paper:NUMERICAL ANALYSIS OF SURROUNDING ROCK STABILITY ON THE INFLUENCE OF DIFFERENT GEOMETRY

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Date of Publication:2009-01-01

Included Journals:CPCI-S

Page Number:1263-1268

Abstract:As underground development continues at great depths, the dangers of surrounding rock instability will inevitably increase in mining and tunnel engineering. Predicting the deformation of tunnels effectively and making sure surrounding rocks are safe are problems civil engineers constantly encounter. This paper investigates how the geometry of tunnels influences the stability of surrounding rocks. A numerical program called RFPA-2D is used to simulate the tunnel failure process at various geometries in deep mining rock masses. The numerical model can be used not only to produce fracturing patterns similar to those reported in previous studies, but also to predict fracturing patterns under a variety of loading conditions. Numerical results indicate that both the width to height ratio of pillar and tunnel shapes have a significant influence on the failure points of pillars and tunnels. The simulated results reproduce the failure process of surrounding rock at different geometries, and they are helpful in construction and support design. This paper suggests that RFPA can be applied to model the surrounding rock failure behavior in complicated rock masses.