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岩体卸荷力学性质主要表现为非线性和各向异性等特征,与常规岩体试验结果和假定存在着差别,采用数值仿真的方法对卸荷岩体力学特性进行研究,阐述卸荷岩体力学特性研究的重要性;给出了数值仿真分析研究的岩体加、卸载条件;利用大型有限元软件ADINA建立数值仿真模型,对模型进行计算分析,并和已有试验成果进行对比,得出了卸荷岩体力学特性的有关规律。
The mechanical properties of unloading rock mass are mainly nonlinear and anisotropic, which are different from the conventional rock mass test results and assumptions. The numerical simulation is used to study the mechanical properties of unloading rock mass, and the unloading rock mass The importance of the research on the mechanical properties of the rock mass; the conditions of adding and unloading of the rock mass in the numerical simulation and analysis are given; the numerical simulation model is established by using the large-scale finite element software ADINA, the model is calculated and analyzed and compared with the existing experimental results Relevant laws of unloading rock mass mechanical properties.