Single-joint rock mass flow-solid coupling testing system and method

Abstract

The invention discloses a single-joint rock mass flow-solid coupling testing system and method. The system is composed of a sample shearing device, a stress loading device, an osmotic pressure servo device and a data collection processing device. Shear force is formed when the sample shearing device exerts pressure on a rock sample, and a crack is formed in the rock sample; the sample is loaded through the stress loading device; fluid osmosis is carried out through the osmotic pressure servo device; experiment data is displayed in real time, collected and recorded through the data collection processing device. Shear-osmotic coupling tests of rock cracks under different normal load conditions can be completed through the devices, the test process is easy to operate and reliable in result, and results can be visually displayed.

Description

technical field [0001] The invention relates to the field of rock mass mechanics tests, in particular to the field of single-crack rock mass flow tests. Background technique [0002] Rock mass is a complex medium rich in fractures. Under the action of groundwater environment and complex geostress, it is subjected to the joint action of normal stress and tangential stress. The seepage characteristics of underground fractures or porous rock mass have great influence on the design and safe operation of underground engineering. have an important impact. Fractured rock mass is an anisotropic geological body that has undergone long-term geological transformation, contains many fractures of different scales and characteristics, and exists in a certain physical environment. Because the rock mass is relatively hard and has low permeability, the deformation of the rock mass mainly occurs in the fissures, and the fissures and their connected networks are the main channels for the migr...

AI Technical Summary

Problems solved by technology

In the current existing technology, the rock mass fluid-solid coupling test mainly uses a shear seepage test device, which is mainly divided into two categories. The first type of test device is modified from a rock shear test machine. It is high and the test process is complicated. It has strict requirements on the shape of the sample. The shape and size of the test sample are single. The main part of the testing machine is a cuboid shear box. The upper box and the lower box of the middle shear box have a certain relative displacement. At this time, it is difficult to ensure the sealing effect on both sides of the shear box, which leads to the failure of the test device due to the unsatisfactory waterproof effect; another type of seepage shear device is used in the Add L-shaped or trapezoidal rigid pads and other fracture shear seepage devices on the basis of conventional triaxial testing machines to achieve shear seepage. The test installation and disassembly process is more complicated and time-consuming It is not good for water leakage, the leaked water will flow into the triaxial pressure chamber, and over time, an oil-water mixture will be formed in the pressure chamber, which will affect the normal use of the triaxial testing machine

Images