论文部分内容阅读
基于岩石单轴压缩试验中出现的不同剪切破坏形式,应用极限分析法推导出岩石单轴抗压强度与黏聚力及内摩擦角的关系式。结合矿区岩石单轴、三轴试验结果,验证以岩石M–C准则参数计算单轴抗压强度关系式的正确性,据此关系式获得的结果与试验结果差值在6%~10%之间。采用实例进行岩石黏聚力和内摩擦角的反演分析,以岩石实际单轴剪切破坏形式和试验结果为依据,两两结合联立计算得到岩石的黏聚力和内摩擦角。实例表明:基于单轴剪切破坏形式和单轴抗压强度值计算岩石黏聚力和内摩擦角的方法准确,具有实用价值,该关系式也揭示了岩石试样破坏类型与岩石力学参数间的内在关系。
Based on different forms of shear failure in uniaxial compression tests of rocks, the relationship between uniaxial compressive strength, cohesion and internal friction angle of rock is deduced by using the limit analysis method. According to the rock uniaxial and triaxial test results, the correctness of calculating the uniaxial compressive strength by M-C criterion parameters is verified, and the difference between the results and the experimental results is between 6% and 10% between. An example was used to analyze the cohesion and internal friction angle of the rock. Based on the actual uniaxial shear failure mode of the rock and the test results, the cohesion and internal friction angle of the rock were calculated by combining the two together. The results show that the method of calculating the cohesion and internal friction angle of rock based on uniaxial shear failure mode and uniaxial compressive strength is accurate and practical. The relationship also reveals the relationship between rock failure type and rock mechanics parameters The inner relationship.