The development and pragmatization of high performance shear-flow coupling test apparatus of rock joints

为了研究深部地下条件下岩石节理的力学-水力耦合特性，对本课题组研制的径向流剪切试验装置进行了改进，研制了一种新型的剪切-流耦合试验装置，阐明了侧向流条件下岩石节理的剪切-流特性。在装置研制过程中，通过大量的反复试验，发现装置的设计要求（如旋转限制和侧向流动）是令人满意的。实验发现，在上盒转动受限的情况下，对剪应力的影响并不显著，而随着节理正应力的增大，渗透率和法向位移的变化趋势不同，其机理复杂。当正应力较低时，不发生沿着接触面破坏，上盒体不受转动约束。通过本课题的研究，完成了一套高性能的剪切-流动耦合试验装置，建立了相应的试验方法，为进一步开发应用提供了可能，今后将通过利用该装置进行的大量试验，收集和积累岩石节理剪切-流动耦合特性的试验成果，并对其机理进行进一步的分析。并将该试验技术和模拟方法应用于现场。

For investigating the mechanical and hydraulic coupling properties of rock joints under the condition of deep underground, a new shear-flow coupling test apparatus has been developed by improving past shearing test apparatus with radial flow developed by our group and the shear-flow behavior of rock joint under lateral flow condition has been clarified. During the apparatus development, by a great number of try-and-error test, it is found that the design requirement (like rotation restriction and lateral flow ) is satisfactory. From the experiment, it is found that in case of rotation restriction for upper box the effect of is not remarkable to shear-stress, and when increasing the normal stress on rock joint, the change trendence of permeability and normal displacement is different and the mechanism is complicated. On the other hand, in case of low normal stress that failure is not occurred along contact surface, there is no effect of rotation restriction for upper box. Through this research, a high-performance of shear-flow coupling test apparatus is completed, and experiment method is also established, and hence it is possible to make further development for practicable use.In the future, through the numerous experiment by using this apparatus the test results of shear-flow coupling properties of rock joints will be collected and accumulated, and the mechanism will be further analyzed. Furthermore, the application of this test technology and simulation method to the filed will be conducted.