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首先,通过岩石受力破坏过程分析给出了岩块的强度参数与岩块破坏时形成的贯穿裂隙强度参数的关系.在此基础上,通过理论推导给出了结构面强度曲线和岩块强度曲线的位置关系,揭示了三轴压缩试验中,在低围压下岩体通常沿结构面破坏,而在高围压下岩体经常沿岩块剪切破坏的机理,并给出了由结构控制转换为应力控制的临界围压的解析解.其次,揭示了在岩体开挖中,岩体破坏的结构控制与应力控制的转换机理,给出了结构控制转化为应力控制的临界初始应力的解析解.算例表明,模型可以有效解释岩体力学行为的结构控制与应力控制的转换机理.
First of all, the relationship between the strength parameters of rock mass and the parameters of perforation formed during rock failure is given through the analysis of rock failure process.On this basis, the strength curves of rock mass and strength of rock mass are given through theoretical analysis The relationship between the rock mass and the rock mass in the triaxial compression test is revealed. The rock mass is usually destroyed along the structural plane under low confining pressure, and the rock mass is often damaged along the rock mass under high confining pressure. Control to the analytical solution of the critical confining pressure of the stress control.Secondly, the mechanism of the structural control and stress control of the failure of rock mass in rock mass excavation is revealed, and the critical initial stress of structural control into stress control is given The numerical examples show that the model can effectively explain the mechanism of structural control and stress control of rock mass mechanics.