Water-sand two-phase seepage testing device for broken rock

Abstract

The invention provides a water-sand two-phase seepage testing device for broken rock. The testing device comprises a loading frame, a permeameter, a first hydraulic control system and a second hydraulic control system, wherein the first hydraulic control system comprises a double-action hydraulic cylinder, a first branched circuit and a second branched circuit, the first branched circuit comprises a first stop valve, a first reversing valve, a first quantitative plunger pump and a first motor which are connected sequentially, the second branched circuit comprises a second stop valve, a second reversing valve, a second quantitative plunger pump and a second motor which are sequentially connected, and the piston rod of the double-action hydraulic cylinder is connected with the permeameter; and the second hydraulic control system comprises a single-action hydraulic cylinder and a third stop valve, and the piston rod of the single-action hydraulic cylinder is connected with the permeameter. According to the testing device, the material of the frame is greatly saved, the rigidity of the frame is enhanced, the volume of the device is reduced, the manufacturability is improved, and the permeameter can be placed and moved easily; and the testing device has a simple structure, can be operated easily and can greatly improve the testing accuracy.

Description

technical field [0001] The invention relates to the field of water-sand two-phase seepage test equipment for broken rocks, in particular to a test device for water-sand two-phase seepage of broken rocks. Background technique [0002] At present, in mining engineering, tunnel engineering and other engineering fields with broken geological structures, safety problems such as water / solid inrush from subsidence columns and water / mud inrush in complex karst tunnels often occur. Problems such as water / solid inrush in subsidence columns and water / mud inrush in complex karst tunnels can all be considered as disasters caused by water-sand two-phase seepage instability in broken rocks, so the penetration test of water-sand two-phase seepage in broken rocks is It has become the basis for the study of water / solid inrush in subsidence columns and water / mud inrush in complex karst tunnels. [0003] Existing test devices for water-sand two-phase seepage of broken rocks are usually compose...

AI Technical Summary

Problems solved by technology

However, this system has the following disadvantages: the loading system generally adopts a large material testing machine, which is bulky and heavy, not only requires a large enough laboratory area, but also is not easy to move; the effective space of the compression chamber of the material testing machine is limited , cannot satisfy the placement of permeameters at different heights; the design of the compression chamber of the material testing machine is not humanized enough, and it is difficult to move the permeameter

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