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该文在理论研究的基础上,建立了岩石与水相互作用的力学模型和耦合参数的表述形式,证明了Biot系数取值范围为大于孔隙率而小于1,通过岩石在不同偏应力状态下的注水试验、不排水试验、在不排水条件下水压力加载和卸载试验、在不排水条件下的比例加载试验等,提出了以不排水试验方法确定比例极限点的观点,证明了岩石在破裂过程中其耦合力学参数是逐步演化的,水压力致使岩石峰值强度下降、变形增加。试验显示Skempton系数分散性较大,在注水和不排水试验条件下,水压力的作用机理也不尽相同;Biot系数在轴向和径向具有不同的演化规律等观点。这种研究对石油开采及高放废物处置等研究具有重要意义。
Based on the theoretical research, this paper established the mechanical model of interaction between rock and water and the formulation of the coupling parameters. It is proved that the Biot coefficient is greater than the porosity and less than 1, and the rock under different deviatoric stress Water injection test, undrained test, water pressure loading and unloading test under undrained condition and proportional load test under undrained condition, put forward the viewpoint of determining the ratio limit point by undrained test method, and proved that during the rupture process of rock The coupling mechanics parameters evolve gradually. The water pressure decreases the rock peak strength and increases the deformation. The experimental results show that the Skempton coefficient is highly dispersive, and the mechanism of water pressure varies with water injection and undrained test conditions. The Biot coefficient has different evolutionary rules in the axial and radial directions. This kind of research is of great significance for the research of oil exploration and disposal of high level radioactive waste.