Assembled and detachable type in-situ test device for seepage of a fractured rock mass

Abstract

The invention discloses an assembled and detachable type in-situ test device for seepage of a fractured rock mass. The assembled and detachable type in-situ test device consists of a first fixed sealing device, a second fixed sealing device and a control system, wherein the first fixed sealing device and the second fixed sealing device are respectively and fixedly arranged in the rock mass, are respectively connected with the control system, and are respectively communicated with a fracture. The assembled and detachable type in-situ test device has the advantages that by performing the seepage test on the given fracture in the rock mass under different pressure conditions, the control system, the first fixed sealing device, the second fixed sealing device and the fracture form a closed loop, so as to automatically collect and store data; the structure is simple, and the assembly and detachment are convenient; the whole device is positioned in the original geological environment of the fractured rock mass, the natural structure and natural stress state of the fractured rock mass are maintained, and the hydraulic conduction coefficient of the fracture seepage is accurately obtained.

Description

technical field [0001] The invention relates to the field of rock mass seepage characteristics research in rock mass mechanics, in particular to an in-situ test device for assembling and dismounting cracked rock mass seepage. Background technique [0002] The rock mass exists in a complex geological environment, and has experienced long, multi-stage internal and external geological forces, and has formed discontinuous surfaces such as cracks of different stages, different scales, different occurrences, and different properties. , making it present complex fractured rock mass structure features. The existence of cracks not only makes the rock mass have structural properties different from ordinary materials (that is, anisotropy, heterogeneity and discontinuity), but also provides channels for the occurrence and seepage of groundwater. The conductivity mainly depends on the opening degree, roughness, filling and other characteristics of the fissures. Generally, the hydraulic ...

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Problems solved by technology

[0003] In the prior art, the hydraulic conductivity of the fracture is obtained through the indoor seepage test. However, the indoor seepage test has certain limitations. The main reasons are: 1) Due to the limitation of the sample size and the disturbance in the sample preparation process, it cannot be completely true 2) The geological environment of the sample changes, mainly lacking the natural stress state of the fractured rock mass on site

[0004] Most of the existing technologies are indoor tests, and there are deficiencies in indoor seepage tests. For indoor tests, the sample size is limited, the sample preparation process is disturbed, the development characteristics of fractures cannot be fully and truly reflected, the geological environment changes, and the natural stress is lacking. Insufficient conditions and other problems, some scholars put forward the point of view of on-site seepage of fractured rock mass, but the on-site seepage test has a large workload, high cost, poor validity of the test, insufficient information collection, and is not perfect

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