温度对软岩渗透系数影响的试验研究

Research on Effect of Temperature on Permeability of Soft Rock

为了研究温度对软岩渗透系数的影响以满足工程设计的需要,通过对软岩恒定应力下水温和岩体温度、温度梯度对岩体渗透性能的影响试验,研究了温度单一因素对软岩渗透性能的影响规律,同时通过软岩的单一因素影响模型推导出了多因素影响模型并进行了试验验证;通过软岩的恒定温度下应力对软岩的渗透系数的影响,分析了温度应力对软岩渗透性能的影响.

In order to research the effect of tempreature on the permeability of soft rock, the experiments including the test of the variation of the permeability of soft rock with different temperatures and definite stress and the test of the variation of the permeability of soft rock with different stresses in definite temperature have been made. For porous soft rock, the mean effective stress is the key factor which controls the variation of permeability in the same temperature. The increasing and decreasing of the mean effective stress will cause the variation of the permeability of porous rock. Water temperature, rock temperature, temperature gradient are also the key factors which effect the variation of permeability. Based on the above experimental results of the single factor, the model of coupling of seepage and temperature is established. And the model is validated in experiments.