Field test system for transfusion, stress and deformation coupling characteristics of jointed rock mass

Abstract

The invention discloses a field test system for transfusion, stress and deformation coupling characteristics of a jointed rock mass. A given crack which passes through a drill hole is subjected to a permeability test under different pressure conditions by virtue of the drill hole, hydraulic power pressure, penetration flow and crack stress deformation can be measured, acquired and tested at the same time, and data can be stored by a high pressure hydraulic test system. A hole is drilled at a rock mass at a crack, a packing capsule is filled in the hole up and down, a test section is remained at the crack, a high pressure water pump pipe is provided with a pressure sensor which is connected into the packing capsule, and the packing capsule is pressurized, thus the packing capsule and hole wall are tightly combined, the high pressure water pump pipe is provided with a flow sensor and a pressure sensor, and a high pressure water pump carries out a flow high pressure hydraulic test on the test section in the drill hole by virtue of a drill pipe; an observation hole is drilled on the rock mass, a multi-point displacement anchor head and a strain gauge are arranged in the hole, the anchor head is connected with a displacement sensor, and the displacement sensor, the flow sensor and the pressure sensor are respectively connected into a data acquisition storage instrument and are respectively controlled by a computer.

Description

technical field [0001] The invention belongs to the field of rock mass seepage characteristics research in rock mechanics, and relates to the hydraulic properties of fractured rock mass, seepage, stress-deformation coupling mechanism research, specifically, involves the high-pressure hydraulic test of fractured rock mass and related stress-strain, Observation methods such as flow rate and displacement, on-site cracked rock mass seepage-stress-deformation test system. Background technique [0002] The main parameters of rock hydraulics are the hydraulic characteristics of a single fracture and the equivalent hydraulic characteristics of rock mass, and the two are closely related. The permeability characteristics of cracks and rock blocks between cracks are the basic parameters that constitute the rock mass permeability tensor. The fracture permeability (or hydraulic conductivity) depends on the geometric characteristics of the fracture surface (differences in relief, roughne...

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Problems solved by technology

Due to the limitation of the sample size and the disturbance in the sample preparation process, the roughness of the crack, the initial gap width and the possible filling cannot be fully reflected.

[0004] In the previous studies on rock mass fracture hydraulics tests, most of the indoor tests were carried out on small-scale specimens with single fractures, seepage and stress tests under normal stress conditions were mostly performed, the geometric representation of the fracture surface was insufficient, and there was a lack of on-site fractured rock mass at a certain initial stage. Seepage and stress coupling test under the condition of stress and fracture seepage deformation consideration

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