Microcomputer-controlled electro-hydraulic servo rock triaxial dynamic shear seepage coupling test device

Abstract

A microcomputer-controlled electrohydraulic servo rock triaxial dynamic shear-seepage coupling multifunctional test apparatus belongs to the technical field of rock mechanics and engineering and is characterized by comprising a loading system, a sealing system, a multiphase fluid injection system, an acoustic emission monitoring system, a transformation monitoring system and a data acquisition system. The apparatus of the invention has the advantages that the technical problem can be solved that an existing triaxial pressure chamber is unsuitable for performing rock large-displacement shear-seepage coupling under high confining pressure and high osmotic pressure; various extended functions based on the shear-seepage coupling technique can be achieved; servo controlled loading of shear-directional force, displacement and strain rate can be achieved, multiphase fluid injection and seepage during dynamic shearing can also be achieved; in addition, a temperature control system is also provided and is suitable for constant temperature control from 0 DEG C to 200 DEG C for the triaxial pressure chamber, so that a series of extended tests such as rock dynamic shear-seepage coupling characteristic test under temperature action can be carried out.

Description

technical field [0001] The invention relates to a microcomputer-controlled electro-hydraulic servo rock three-axis dynamic shear-seepage coupling test device, which belongs to the field of rock mechanics and engineering technology, and in particular to a microcomputer-controlled electro-hydraulic servo rock three-axis dynamic shear-seepage coupling test device, which can be used in different Experimental study of dynamic shear-seepage coupling characteristics of intact or single-fractured rocks under the effect of temperature and different fluid injections. Background technique [0002] In underground geotechnical engineering, the interaction between rock mass and groundwater often determines the stability of rock mass engineering, and the shear-slip instability of rock mass under hydraulic coupling usually leads to major geological disasters. Therefore, In-depth study of the shear-seepage coupling characteristics of rock mass and the resulting instability rules is of vital ...

AI Technical Summary

Problems solved by technology

However, these existing joint shear test equipment have the following problems: 1. The sealing operation of the test equipment is cumbersome and the sealing effect is difficult to meet the requirements of the test; 2. Most of these test techniques are based on the transformation of the rock direct shear test machine However, it is difficult to ensure the constant shearing direction of the upper and lower boxes of the direct shear box during the shear slip process, which makes it difficult to achieve lateral sealing, especially difficult to achieve High seepage pressure sealing; 3. The traditional direct shear box only considers the normal force of the rock mass, but ignores the lateral force pressure, which makes the stress state of the rock mass and the actual state of occurrence serious. Inconsistent; 4. The traditional direct shear box has not seen gas as the permeation medium, which makes the test function single

5. The shear displacement of the rock is not very large, mainly because the larger the shear displacement, the worse the sealing performance of the cracked rock; 6. There is no reliable monitoring equipment to monitor the rock shear seepage process, and only rely on It is neither scientific nor accurate to infer the shear-seepage characteristics based on the variation of deformation and flow

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