A rock joint seepage device with controllable gap width under high seepage pressure

Abstract

The invention relates to a rock joint seepage device with controllable gap width under a high seepage pressure, comprising a lower box body, an upper box body, two side plates and a lifting unit; the lower box body is in the shape of reversed U; in installation, the lower box body and two side plates are encircled to be a cavity body for placing a rock sample; the middle parts of two side plates are inwards provided with linear lead rails leveled to the top part of the lower box body; the upper box body is horizontally placed on the linear lead rail, and the middle part of the upper box body is provided with a through hole with the same dimension as the top face of the rock sample; the lifting unit is connected to the top part of the rock sample by crossing through the through hole of the upper box body, a water inlet channel and a water outlet channel for interconnecting with the cavity are arranged in the lower box body. Compared with the prior art, the rock joint seepage device can provide constant high seepage pressure value in the rock joint sample seepage testing process, and realize constant pressure difference of charged and discharged water of the rock joint sample; the device can bear high seepage water pressure, has controllable joint gap width, higher testing precision, and also can simulate geological characteristics of real joints, and others.

Description

technical field [0001] The invention relates to a rock joint seepage test, in particular to a rock joint seepage device with controllable gap width under high seepage pressure. Background technique [0002] In the deep rock mass with rich groundwater, as the main water-conducting channel of the underground rock mass, the high osmotic pressure and high hydraulic gradient in the rock joints often cause high-speed seepage problems, which easily lead to pollution seepage, reservoir seepage, and tunnel seepage Water hazards in deep underground engineering. The existing research results mainly focus on the seepage characteristics of rock joints under low seepage pressure. Under high seepage pressure, due to the complex geometric characteristics of rock joints and the high-speed turbulent flow phenomenon in the seepage process, the computational complexity of numerical methods is too large. Or it is difficult to converge, the indoor seepage test is still a direct and effective mea...

AI Technical Summary

Problems solved by technology

There have been a lot of test equipment on the seepage characteristics of rock joints at home and abroad. Due to the limitation of sealing conditions, joint seepage is mostly carried out under low hydraulic gradients. In addition, most of them do not take into account the roughness of real rock joints. For example, using parallel plexiglass to simulate rock joints, or use parallel plates bonded with sand grains to simulate rock joints, neither can truly reflect the geometric characteristics of rock joints

As the two most important factors affecting the seepage characteristics of joints, joint roughness and gap width, the previous research results have not been able to study the seepage characteristics of rock joints under single factor control

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