论文部分内容阅读
利用MTS815 Flex Test GT岩石力学试验系统,经过岩体受力状态模拟、无水压岩体力学特性测试、水岩耦合试验等几个阶段试验,对砂板岩岩体力学特性的高空隙水压效应进行了试验研究。结果表明:砂板岩岩体强度与变形性能随水压升高而降低,其中水压对黏聚力c的影响最大,对内摩擦角φ的影响甚微,对变形模量的影响居于二者之间。随着水压升高,岩体的黏聚力c急剧下降,当水压较高时,岩体可能完全丧失黏聚力;随着水压升高,变形模量E50和E0均有降低,两个参数的变化梯度相差不大。这些成果揭示了砂板岩岩体力学特性的高空隙水压力效应,并建立了主要力学参数预测模型,成果对于解决工程实际问题具有重要的参考价值。
MTS815 Flex Test GT rock mechanics test system was used to simulate the mechanics characteristics of sandstone rock mass under high pressure of hydraulic pressure after several stages of tests, such as the mechanical state of rock mass, the mechanical characteristics of non-hydraulic rock mass and water-rock coupling test. Effects of the experimental study. The results show that the strength and deformation performance of sandstone rock mass decrease with the increase of water pressure, and the influence of water pressure on cohesion c is the greatest, and the influence on internal friction angle φ is very little. The influence on deformation modulus resides in two Between. As the water pressure increases, the cohesion c of the rock mass decreases sharply. When the water pressure is high, the rock mass may completely lose cohesion; as the water pressure increases, the deformation modulus E50 and E0 decrease, The gradient of the two parameters is not much different. These results reveal the high pore water pressure effect of the mechanical properties of sandstone rock mass and establish the prediction model of the main mechanical parameters. The results have important reference value for solving practical engineering problems.