Jointed rock mass test piece and jointed rock mass and aqueous rock coupling test method

A technology of water-rock coupling and fractured rock mass, which is applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problem of inability to quantitatively describe the mechanical properties of rock mass, etc. Experiment with simple effects

Inactive Publication Date: 2012-09-12
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When carrying out engineering design, people very much hope to grasp the changes of rock mass properties under the action of various factors, and try to quantitatively describe the changes of rock mass mechanical properties caused by these fact

Method used

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  • Jointed rock mass test piece and jointed rock mass and aqueous rock coupling test method
  • Jointed rock mass test piece and jointed rock mass and aqueous rock coupling test method
  • Jointed rock mass test piece and jointed rock mass and aqueous rock coupling test method

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Embodiment 1

[0035] In this embodiment, the shape and structure of the rock sample are as follows figure 1 , figure 2 As shown, the body 1 is cylindrical, the height of the cylindrical body is H=100mm, and the diameter Φ=50mm. A blind water guide hole is processed on both ends of the cylindrical body, which are respectively named as the first blind water guide hole 2 and the second guide water guide hole. Blind water hole 3, the centerlines of the first blind water guide hole 2 and the second blind water guide hole 3 are located on the plane passing through the centerline of the rock block test piece, and are distributed axially symmetrically with respect to the center line of the rock block test piece. The distance between the centerlines is 30mm, the aperture φ of the two holes is 6mm, the depth of the two holes is 80mm, and the distance between the centerline of the two holes and the outer edge of the cylindrical body 1 is 10mm.

[0036] The rock block test pieces in this embodiment a...

Embodiment 2

[0038] The 6 rock test pieces described in Example 1 are installed on the rock mechanics test equipment, carry out the triaxial compression whole process test to each rock block test piece under 60MPa confining pressure, its fracturing and make the fracture in the test piece The seepage channel connected with the water-guiding blind hole is formed, that is, the fractured rock mass specimen is formed, and its shape is shown in image 3 .

Embodiment 3

[0040] In this embodiment, the rock mass of the dam foundation of a large hydropower station is tested. The dam foundation of a large-scale hydropower station is composed of rock mass with a fracture surface, which is called the dam foundation rock mass. A large number of investigation and research work have obtained the main mechanical properties and parameters of the dam foundation rock mass. The parameters include the rock mass when it was formed. The minimum principal stress (equivalent to confining pressure) σ in the rock mass stress field 3 ′, the minimum principal stress σ in the stress field of the rock mass at the time of the test 3 , friction coefficient f in rock, cohesion c, and deformation modulus E. The main results obtained from survey research are: σ 3 'not less than 60MPa, σ 3 Generally not more than 30MPa, f is 0.43, c is 4.2MPa, and E is 2~3GPa. After the hydropower dam is completed, it will store water to generate electricity, and the water storage heigh...

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Abstract

The invention relates to a rock test piece which comprises a cylindrical main body, wherein at least one water-guiding blind hole is respectively processed on each of the two end faces of the cylindrical main body. A jointed rock mass test piece is obtained by performing a rock forming simulation test on the rock test piece. According to the rock forming simulation test, a tri-axial compression whole-process test is performed on each rock test piece under the condition of applying a confining pressure, the rock test piece is crushed, and communicated influent channels are formed by a crushed surface of the rock test piece and the water-guiding blind hole. A jointed rock mass and aqueous rock coupling test method comprises the following steps: (1) collecting the rocks in a to-be-constructed engineering rock mass and processing the rocks into the rock test pieces with such shape and structure, and (2) mounting a set of rock test pieces on rock mechanic test equipment, and performing a rock forming simulation test, a stress adjusting test, a natural state test and an aqueous rock coupling test in turn, thereby obtaining a quantitative description for the influence of water pressure on the mechanical parameters of the to-be-constructed engineering rock mass.

Description

technical field [0001] The invention belongs to the field of rock mass mechanical performance testing, in particular to a fissure rock mass test piece and a method for carrying out a water-rock coupling test with the fissure rock mass test piece. Background technique [0002] All human engineering buildings and structures are based on rock mass or soil mass, and the vast majority of mountainous areas are based on rock mass. According to the definition of rock mass in engineering science, rock mass refers to a geological body composed of structural planes, rock blocks and in-situ stress. The structural planes are discontinuous planes of various directions, scales and properties existing in the rock mass, such as planes of original origin, quasi-beddings, joint planes, etc., faults and fissures of structural origin, and unloading weathering caused by supergene transformation. fissures, etc.; the rock block refers to the rock block cut by the above-mentioned various structural...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N3/12
Inventor 徐进邓建辉刘建锋任浩南聂明王璐杨昊天
Owner SICHUAN UNIV
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