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| SIMULATING TIME-DEPENDENT FAILURE OF DEEP MARBLE WITH PARTICLE FLOW CODE |
| LIU Ning，ZHANG Chunsheng，CHU Weijiang |
| (HydroChina Huadong Engineering Corporation，Hangzhou，Zhejiang 310014，China) |
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Abstract Description on rock basic mechanical behaviour by particle flow code(PFC) starts from contact state among particles and change characteristics. PFC could overcome the difficulties of rock self microscopic behavior and realize the simulation of microscopic structure in rock model. All of those can not be solved by traditional fracture mechanics. The failure of Jinping deep marble is dependent on time. It can be simulated by the parallel-bonded stress corrosion(PSC) model in PFC. A numerical mode for rock that includes time-dependent behavior by adding a damage-raw law to the parallel-bond model is described. Combining with the static-fatigue data of Jinping marble，the microscopic parameters are confirmed in PSC model. The deformation，crack and failure behavior are analyzed in simulation by the test results of PSC under different driving-stress ratios. The results obtained by PFC are coincidence well with the microscopic behavior in rock failure process. The microscopic behavior can help us better to understand the brittle rock strength dependent on time.
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Received: 17 May 2011
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2011, Vol. 30 
