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Rock structure surface shearing device and method

A technology of shearing device and structural surface, applied in the direction of measuring device, using stable shearing force to test the strength of materials, instruments, etc., can solve problems not related to the development of rock shear testing machine

Active Publication Date: 2014-06-25
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, many current experiments have not involved the development of rock shear testing machines under different temperature conditions.

Method used

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  • Rock structure surface shearing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The shearing method of the rock structure plane of the present invention comprises the following steps:

[0039] (1) Fabrication and heating of test pieces: Maokou limestone hanging wall rock blocks and footwall rock blocks including rock structural planes were selected at the mine roadway engineering site. The rock blocks on the Maokou limestone rock structure surface and the footwall rock blocks are all cut into: length * width * height = 20cm * 10cm * 15cm test piece, on the rock structure face of Maokou limestone rock block 33, Four heating holes 20 are respectively processed on the rock block 32 of the footwall, and the depth is 2 / 3 of the thickness of the rock block sample, and then high-quality high-temperature resistant silicone oil 42 is injected into it, and the rubber plug 5 with a heating rod 25 is used to seal and heat the hole. Hole 20, glue and seal the rubber plug 5 and heating hole 20 with high temperature resistant glue, and tightly block the heating h...

Embodiment 2

[0045] This example adopts basically the same implementation method as Example 1, the difference is: step (1) heat the temperature of the high-quality heat-resistant silicone oil on the rock structure surface of Maokou limestone and in the heating hole of the footwall rock block to 100 °C, after heating for 5 hours, the average temperature value of the upper and lower rock blocks is 94.5 °C obtained by temperature sensors at various places on the upper wall rock block and footwall rock block of the rock structure.

[0046] The peak shear strength of the structural plane of Maokou limestone obtained under the above treatment conditions is 5.71±1.10 MPa, and the peak dilatancy displacement is 1.03±0.27mm

Embodiment 3

[0048] This example adopts the same implementation method as Example 1, the difference is: step (1) heat the temperature of the high-quality heat-resistant silicone oil on the rock structure surface of Maokou limestone and in the heating hole of the footwall rock block to 150 °C, after heating for 5 hours, the average temperature value of the upper and lower rock blocks is 138.3°C obtained by temperature sensors at various places on the upper wall rock block and footwall rock block of the rock structure.

[0049] The peak shear strength of the structural plane of Maokou limestone obtained under the above treatment conditions is 3.89±0.95 MPa, and the peak dilatancy displacement is 1.36±0.35 mm.

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Abstract

The invention relates to a rock structure surface shearing device and method. The rock structure surface shearing device comprises a test piece system, a pressure plate system, a loading system and a data acquisition system, wherein the test piece system comprises an upper rock and a lower rock with heating holes on a rock structure surface, the loading system can be used for performing normal pressure loading, left shearing force loading and right shearing force loading, and the pressure plate system comprises two 7-shaped loading plates; the rock structure surface shearing device also comprises a roll set system which includes four groups of press rolls for connecting the loading system and the pressure plate system to reduce friction of a test piece and the loading system; the rock structure surface shearing device further can comprise a heating system which adopts heating rods to control the temperature of high-quality heat-resisting silicone oil in the heating holes to heat the upper rock and the lower rock on the rock structure surface; the data acquisition system can be used for acquiring data of pressure, displacement and temperature. The rock structure surface shearing device can bidirectionally shear the test piece of the rock structure surface and realize research to the shearing characteristic of the rock structure surface at different temperatures.

Description

technical field [0001] The invention relates to shearing of rock structural planes, in particular to a rock structural plane shearing device and method. Background technique [0002] Rock structural plane is a common medium in slope engineering, dam foundation engineering, and mining engineering. A large number of discontinuous surfaces inside the rock mass affect and determine the physical and mechanical properties of the rock mass. Shear tests are used to understand the mechanics and deformation of rock structural planes It provides an important basis for the design and construction of various rock mass engineering. [0003] The shear strength test is divided into a non-restrictive strength shear test and a restrictive shear strength test. In the unrestricted strength shear test, only shear stress exists on the shear plane, and no normal stress exists; in the restrictive strength shear test, there exists normal stress in addition to the shear stress on the shear plane. T...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N3/02
CPCG01N3/24G01N2203/005G01N2203/0222
Inventor 赵延林万文王卫军
Owner HUNAN UNIV OF SCI & TECH
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