Apparatus and method for seepage test in rough intersecting fractures

Abstract

The invention discloses a rough cross crack seepage testing device and method. The rough cross crack seepage testing device comprises a cross crack model, the interior of the cross crack model is of a crossed crack structure, dewatering areas and water gathering areas are arranged on the two sides of the crack structure, the dewatering areas are communicated with water inlets respectively, the water gathering areas are communicated with water outlets respectively, and the water inlets and the water outlets located on the same side of the cross crack model are connected with the same water tank and form a circulation loop; by means of the two circulation loops, crack seepage of one-way entering and multi-way exiting, multi-way entering and one-way exiting and multi-way entering and multi-way exiting is achieved; besides, pressure measuring holes communicated with the crack structure are further formed in the crack structure, and water pressure sensors for measuring fluid pressure are arranged in the pressure measuring holes.

Description

technical field [0001] The invention relates to a seepage test device, in particular to a rough intersecting crack seepage test device and method, and belongs to the technical field of civil engineering. Background technique [0002] In recent years, with the construction of a large number of large-scale projects such as energy mining, nuclear waste treatment, water conservancy projects, and utilization of underground space, the problem of seepage in rock fractures has attracted widespread attention. With the development of economy and society, human beings have more and more demand for underground space. However, in the process of excavation and operation, disasters such as water and mud inrush often occur, and the problem of seepage in fractured media still needs to be solved urgently. [0003] A large number of fractures exist in natural rock mass, which seriously affects the seepage characteristics of rock mass. The size and connectivity of pores in fractured rock mass a...

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Problems solved by technology

[0004] At present, the research on seepage in rock fractures is mainly concentrated on a single fracture, and there are few studies on intersecting fractures, especially experimental research.

Analyzing the reasons, the main reason is that the test conditions are relatively harsh, it is impossible to obtain a suitable cross-crack model, and it is difficult to control the flow rate of the fluid and the size of the crack width, etc.

Therefore, the seepage mechanism of intersecting fractures cannot be obtained

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