加载速率对石灰岩力学效应的试验研究

Experimental analysis on mechanical effects of loading rates on limestone

采用RMT-150B岩石力学电液刚性伺服控制试验系统对石灰岩标准试件进行4级不同加载速率的单轴压缩变形室内试验,定量的分析了加载速率对石灰岩试件单轴抗压强度、峰值强度以及对应的应变、破坏后的性态、破裂形式及应力–应变关系等物理力学性态的影响。得出该石灰岩试件单轴压缩破坏的全过程曲线及一些重要特性和参数,为该矿山开采设计提供重要依据。

The experimental tests for limestone specimens in uniaxial compression were carried out to study the mechanical effects of loading rates on limestone using electro-hydraulic and servo-controlled testing machine (RMT-150B), in which loading rate was treated as a variable. Mechanical characteristics of rock influenced by the loading rates, such as a uniaxial compressive strength, deformation, mode of failure as well as the post-failure behaviour and complete stress-strain curve, were analyzed quantitatively. The complete uniaxial compression failure curve and some important characteristics and parameters of the limestone were obtained and offered on important basis for the exploitation and design of the mine.