Testing device and testing method for simulating hydrodynamic pressure action in rock fracture

Abstract

The invention discloses a testing device and a testing method for simulating hydrodynamic pressure action in rock fracture. A rock sample with a crack is placed into a testing water tank, the position of the rock sample is adjusted to enable a crack to directly face a rectangular hole; testing water flows are pumped into the testing water tank to be subjected to hydrodynamic pressure testing through a water injection pipe by a high-pressure water supply pump; a pressure meter, a pressure control valve and a pressure release valve are arranged on the testing water tank for controlling the flow pressure and the flow rate of the inside of the testing water tank; and an anchorage point is arranged on the testing water tank and is connected with a displacement meter and the rock sample, a pressure sensor, a flow sensor and the displacement meter are arranged on the water injection pipe and are used for transmitting the acquired data to a data acquisition instrument and are connected with a computer, and the computer is used for recording the testing data such as pressure, flow rate, the change of the diameter of the rock sample and the like. The structure is simple, the processing operation is easy and the operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics tests, relates to a hydrodynamic pressure test of a fractured rock mass and a study on the fluid-solid coupling mechanism of a fractured rock mass, and deeply studies the mechanical properties of a deep fractured rock mass under hydrodynamic pressure. Specifically, it particularly relates to a test device and method for simulating the action of hydrodynamic pressure in rock fissures. technical background [0002] In many geotechnical engineering such as mining and tunnel excavation, there are a large number of deep rock mechanics engineering. Human or natural factors such as excavation change the stress balance state of the deep rock mass, release the elastic strain energy of the deep rock mass, expand the original micro-cracks in the rock mass, and make adjacent cracks penetrate, affecting the stability of the deep rock mass , so that there are potential safety hazards in geotechnical eng...

AI Technical Summary

Problems solved by technology

[0004] Limited by the test conditions, the current research on fractured rock mass under the action of water mainly focuses on the influence of hydrostatic pressure on the strength of fractured rock mass, and few scholars have studied the influence of hydrodynamic pressure on the strength of fractured rock mass

Even if a few scholars study the influence of water flow on the strength of fractured rock mass under the flowing state, they cannot ensure that the test water flow directly passes through the fracture, and fail to measure the flow velocity and hydrodynamic pressure of the water passing through the fracture.

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