Sealing device for shear test under multi-field coupling action of rock fracture

Abstract

The invention discloses a sealing device for a shear test under multi-field coupling action of rock fracture. The sealing device comprises upper pressure blocks, lower pressure blocks and seal rubber sheets, and the seal rubber sheets are used for crimping and deforming along with increase of shear displacement in a shear process. Rock samples are put in rigid shear boxes, the upper pressure blocks and the lower pressure blocks are placed on two sides of the rock samples in the shear direction, and a gap allowing placement of each seal rubber sheet is reserved between each upper pressure block and the corresponding lower pressure block. The upper end of each seal rubber sheet is connected with the corresponding upper pressure block, and the lower end of each seal rubber sheet is connected with the corresponding lower pressure block. A hollow water storage chamber is formed between each seal rubber sheet and a fracture seepage surface of the corresponding rock sample, the hollow water storage chamber on one side is communicated with a water inlet, and the hollow water storage chamber on the other side is communicated with a water outlet. The sealing device for the shear test under multi-field coupling action of rock fracture is effective in avoiding of water leakage and high in stability.

Description

technical field [0001] The invention belongs to the field of rock mechanics, and relates to a sealing device in a rock fissure shear seepage test, in particular to a multi-field coupling considering rock fissure thermodynamics, hydraulics, mechanics, chemistry (Thermal-Hydrological-Mechanical-Chemical: THMC) Test piece sealing device under action. Background technique [0002] Large-scale deep underground rock mass projects such as nuclear waste treatment, natural gas and carbon dioxide underground storage, compressed gas energy storage, deep water conservancy and mining projects are usually built in fractured rock mass, and the multi-field coupling characteristics of underground deep fractured rock mass under the action of high seepage pressure It is a key factor related to the safety of this kind of underground engineering, and it has always been a hot spot in the field of rock mechanics. The rock fracture shear test system considering the coupling effect of THMC is an imp...

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Problems solved by technology

[0004] In order to overcome the shortcomings of easy water leakage and poor stability of the sealing device in the existing rock shear seepage test, the present invention provides a sealing device that can effectively avoid water leakage and have good stability for the shear test under the multi-field coupling action of rock fissures. device

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