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利用非连续变形分析岩石断裂方法(Discontinue Deformation Analysis for Rock Failure,DDARF)数值模拟技术对平行节理岩体试件进行理论分析和数值模拟,研究了不同侧压力状态和原生裂隙角度等物理参数对剪切破坏和峰值强度的影响程度,指出侧压力和裂隙角度是岩体发生剪切破坏的主要原因。依据实际地下工程情形,建立具有平行节理岩体的地下洞室模型,并利用非连续变形分析方法(Discontinue Deformation Analysis,DDA)模拟地下洞室开挖过程围岩结构位移和稳定性分析,研究结果表明,平行节理岩体在不同地应力条件和裂隙角度下对洞室周围岩体稳定性具有不同程度的影响。
By using the numerical simulation technique of Discontinue Deformation Analysis for Rock Failure (DDARF), the theoretical analysis and numerical simulation of the parallel jointed rock mass specimens are carried out. The influence of physical parameters such as different lateral pressure states and primary fracture angles on shear The effects of shear failure and peak strength are analyzed. It is pointed out that the lateral pressure and fracture angle are the main causes of shear failure of rock mass. According to the actual underground engineering conditions, the underground cavern model with parallel jointed rock mass is established, and the Discontinue Deformation Analysis (DDA) is used to simulate the displacement and stability analysis of the surrounding rock structure during underground cavern excavation. The results It shows that the parallel jointed rock mass has different degrees of influence on the rock mass stability around the cavern under different conditions of stress and fracture angle.