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A device and method for shearing rock structural planes

A structural surface and rock technology, applied in the field of rock structural surface shearing devices, can solve problems not related to the development of rock shear testing machines

Active Publication Date: 2016-03-30
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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  • A device and method for shearing rock structural planes
  • A device and method for shearing rock structural planes
  • A device and method for shearing rock structural planes

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±1.10MPa, and the peak dilation 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 by the above treatment conditions is 3.89±0.95MPa, and the peak dilation displacement is 1.36±0.35mm.

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Abstract

The invention relates to a rock structure plane shearing device and method. The device includes a specimen system, a platen system, a loading system and a data acquisition system. The specimen system consists of rock blocks on the upper and lower sides of the rock structure with heating holes; the loading system is divided into normal pressure loading, left shear loading and right shear loading; the pressing plate system consists of two 7 Font-shaped loading plate; it also includes a roller set system, including four sets of pressing roller sets, which connect the loading system and the pressing plate system to reduce the friction between the test piece and the loading system; it can also further include a heating system, which is controlled by a heating rod The temperature of the high-quality heat-resistant silicone oil in the heating hole realizes the heating of the two rock blocks on the rock structure surface and below. The data acquisition system realizes the data acquisition of pressure, displacement and temperature. The invention can realize the two-way shearing of the rock structure test piece, and can realize the research on the shear characteristics of the rock structure plane 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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Patent Type & Authority Patents(China)
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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