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Accurate sample production method for inclined anchored jointed rock mass, and anchored jointed rock mass

A technology for rock mass and anchor joints, which is applied in the field of accurate sample preparation of inclined anchor joint rock mass and anchor joint rock mass, and can solve problems such as the inability to reserve anchor rod installation holes on three-dimensional structural surfaces

Active Publication Date: 2018-10-16
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for accurate sample preparation of inclined anchor jointed rock mass, which has the advantages of simple production and convenient operation, and solves the problem that the three-dimensional structural surface cannot be reserved at any angle with the structural surface in the prior art. Anchor mounting hole problem

Method used

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  • Accurate sample production method for inclined anchored jointed rock mass, and anchored jointed rock mass
  • Accurate sample production method for inclined anchored jointed rock mass, and anchored jointed rock mass
  • Accurate sample production method for inclined anchored jointed rock mass, and anchored jointed rock mass

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Effect test

no. 1 example

[0060] The first embodiment: a 60-degree inclination angle plus an anchor jointed rock mass sample (single anchor rod 4)

[0061] Gypsum is selected as a similar material, the anchoring agent is cement slurry, and the upper and lower plates of the joint sample are combined to form a cube sample with a length of 100 mm. The anchor rod installation hole 5 passes through the center of the structural surface. The diameter of the anchor rod installation hole 5 is 12 mm. The shear direction of the structural plane is at an angle of 60 degrees.

[0062] (1) Scanning the three-dimensional structural surface, the software reconstructs the three-dimensional structural surface and intercepts blocks within the range of 100*100mm (x*y);

[0063] (2) Stretch 5mm on both sides respectively, and make a cylinder with a diameter of 12mm through the center of the structural surface. The axial direction of the cylinder forms an angle of 60 degrees with the selected shearing direction, and the fir...

no. 2 example

[0068] The second embodiment: 90 degree inclination angle plus anchor jointed rock mass sample (three anchor rods 4)

[0069] Select high-strength cement and river sand as similar materials, and the anchoring agent is cement slurry. The combined size of the upper and lower plates of the joint sample is 300*100*100mm. (150,50) and (250,50), the diameter of the mounting hole is 12mm, and the axis of the mounting hole is at an angle of 30 degrees to the shearing direction of the structural surface.

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Abstract

The invention discloses an accurate sample production method for an inclined anchored jointed rock mass, and the anchored jointed rock mass, and relates to the technical fields of geomechanics and geotechnical engineering. The method includes the following steps: S1, processing a sample production mold according to the anchoring scheme of the inclined and anchored rock mass; S2, mounting the sample production mold in a sample pouring mold; S3, pouring a pouring sample with an anchor pole mounting hole into the sample pouring mold according to an assigned material proportioning ratio; and S4, mounting an anchor rod in the anchor rod mounting hole. The arbitrary inclined anchored jointed rock mass can be obtained through the method.

Description

technical field [0001] The invention relates to the technical field of rock-soil mechanics and rock-soil engineering tests, and in particular to an accurate sample preparation method for an inclined anchored jointed rock mass and an anchored jointed rock mass. Background technique [0002] Discontinuities of different sizes and directions are widely distributed in natural rock mass, including bedding, joints, faults, etc. The mechanical properties of rock mass, especially the shear mechanical properties, are controlled by discontinuities. The discontinuous surface of the rock mass significantly reduces the strength and seriously affects the stability and safety of the rock mass engineering. To improve the shear resistance of the rock mass, rock bolts are usually installed at an angle to the discontinuity of the rock mass. Determining the support capacity of anchored jointed rock mass under different installation angles has great significance and engineering value for engine...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/36
CPCG01N1/28G01N1/36G01N2001/366
Inventor 张传庆崔国建单治钢周辉程广坦卢景景薛少强
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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