含裂隙水围岩巷道变形破坏数值模拟

巷道围岩在地下水渗透作用下慢慢软化,使得围岩内部的裂隙不断发生扩展,在这些裂隙达到贯通或者通过损伤演化扩展形成新的裂隙后,就成为了宏观状态下的裂缝,当这些裂缝不断的发生积累演化,最后导致岩体失稳破坏。这种失稳破坏改变了围岩应力分布状态,影响到围岩位移场分布及破坏范围,从而大大降低了围岩的稳定性,给煤矿的安全生产带来了隐患。结合断裂力学和损伤力学的相关理论,笔者建立了FLAC3D二次开发模型并进行了验证,将此模型应用于工程实践的稳定性分析。

Numerical Simulation on Rock Deformation and Damage of Roadway Contained by The Fissure Water

Under the seepage effect of groundwater, roadway surrounding rock get slowly softening, and make the surrounding rock within the fracture extend continuously. When these fractures extend to new fractures reaching through or by the fractures damage evolution, it becomes macroeconomic fractures, when these fractures accumulation evolution continuously, resulting instability and failure of rock mass. This instability and failure changes surrounding rock stress distribution state, and affects surrounding rock displacement field distribution and the damage range, thus greatly reduces the stability of surrounding rock, which brings hidden trouble for the safety production in coal mine. Based on the relevant theory of fracture mechanics and damage mechanics, a FLAC3D secondary development model was established and validated, and then this model was applied to analyze the stability of engineering practice. Finally, the results show the correctness of the model.