Direct shearing test device for rock and earth mass bulk materials under freezing and thawing conditions and test method thereof

A technology for bulk materials and testing devices, which is applied to measuring devices, using stable shear force to test the strength of materials, analyzing materials, etc., to achieve the effects of not affecting production, accurate experimental data, and simple principles

Inactive Publication Date: 2019-07-09
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

The dump is a huge artificial loose cu...

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  • Direct shearing test device for rock and earth mass bulk materials under freezing and thawing conditions and test method thereof
  • Direct shearing test device for rock and earth mass bulk materials under freezing and thawing conditions and test method thereof
  • Direct shearing test device for rock and earth mass bulk materials under freezing and thawing conditions and test method thereof

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Embodiment Construction

[0024] The specific technical solutions of the present invention are described in conjunction with the accompanying drawings.

[0025] Such as figure 1 As shown, the direct shear test device for rock-soil bulk materials under freeze-thaw conditions includes:

[0026] Stress loading system, including vertical continuous loading system 2 and horizontal continuous loading system 6;

[0027] Specimen control system, comprising a base 14 and an upper shear box 4 and a lower shear box 7 for loading samples, such as figure 2 and image 3 As shown, the upper shear box 4 and the lower shear box 7 are relatively arranged up and down to form the shear box; the upper shear box 4 and the lower shear box 7 are connected with steel balls 9, as Figure 5 As shown, the lower shear box 7 is connected with the base 14 with a steel ball 9; the loading piston plate 15 is located above the upper shear box 4, and there is a gap between the two; it also includes an axial pressure steel plate 12 a...

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Abstract

The invention belongs to the technical field of mechanical tests of bulk materials during mining, and relates to a direct shearing test device for rock and earth mass bulk materials under freezing andthawing conditions and a test method thereof. The direct shearing test device comprises a stress loading system, a test piece control system, a cold-heat temperature control circulating system and adata acquisition system. The shear strength, an internal friction angle and a cohesive force c of the bulk materials are obtained by direct shearing experiment analysis of a test sample under different numbers of times of freezing and thawing; a varying rule of the strength of the bulk materials under repeated freezing and thawing is analyzed based on data; important parameters are provided for researching the stability of a side slope of a waste dump of a metal mine in an alpine high-altitude district; in addition, a varying rule of mechanical properties of the bulk materials under differentsize proportions can be also researched, and the mechanical characteristics of the bulk materials at all the levels under different axial stresses can be accurately, conveniently and quickly measuredthrough the test piece control system and the stress loading system; an experiment is simulated in a lab; and the direct shearing test device is easy and convenient to operate and relatively precise in experimental data.

Description

technical field [0001] The invention belongs to the technical field of mechanical testing of mining bulk materials, and relates to a direct shear testing device and a testing method for rock and soil bulk materials under freeze-thaw conditions. Background technique [0002] In surface mining and underground mining activities, including stripping and roadway development during mine infrastructure, the discharge generally includes humic topsoil, weathered rock and soil, hard rock and mixed rock and soil, and sometimes includes off-surface ore that may be recovered , lean ore, etc., need to be transported to a certain place for disposal, and this place is called a dump. The dump is a kind of huge artificial loose cushion body, which has serious safety problems. The instability of the dump will lead to mine disasters and major engineering accidents, which will not only affect the normal production of the mine, but also cause the mine to suffer huge economic losses, so it is ver...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N3/02
CPCG01N3/02G01N3/24G01N2203/0003G01N2203/0025G01N2203/0048G01N2203/0075G01N2203/0222G01N2203/0254G01N2203/0284G01N2203/0676G01N2203/0682
Inventor 王家臣徐文彬王晓纯
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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