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Physical simulation experiment anchor bolt/cable mechanization support method

A technology of physical simulation and similar simulation experiment, applied in the field of bolt/cable mechanized support, it can solve the problems that the experimental similarity principle cannot be satisfied, the reliability of experimental results is affected, and the reliability of experimental results is low, and it is easy to scale production, The effect of low success rate and small disturbance degree

Inactive Publication Date: 2017-03-29
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the support technology in the physical simulation experiment is backward, and the rigid extrusion method of manually impacting the tail of the anchor rod / cable is usually used for installation. This operation greatly disturbs the stress field of the surrounding rock composed of similar simulation materials, which seriously affects the experimental results. reliability
At the same time, anchor rods and anchor cables have different structural and mechanical characteristics. In previous physical simulation experiments, longer anchor rods were used instead of anchor cables for support. The experimental similarity principle could not be satisfied, resulting in problems in the experimental scheme and low reliability of the experimental results.

Method used

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  • Physical simulation experiment anchor bolt/cable mechanization support method
  • Physical simulation experiment anchor bolt/cable mechanization support method
  • Physical simulation experiment anchor bolt/cable mechanization support method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] See figure 1 . The force-measuring bolt component consists of a rock breaking part 1, a bolt main body 2, a fixing part 3, a clamping part 4, a bolt force-measuring ring 5, a bolt tray 6, a washer 7 and a nut 8. The size of the anchor bolt selected in the simulation experiment should meet the similar conditions of the physical simulation experiment, and the geometric similarity constant C l , the stress similarity constant C σ , the time similarity constant C t :

[0033] l 1 =L 1 / C l

[0034] d 1 =D 1 / C l

[0035] p 1 =P 1 / C σ

[0036] t 1 =T 1 / C t

[0037] In the formula, the bolt / cable length actually used in the experimental simulation mine is L 1 , with a diameter of D 1 , the preload is P 1 , time T to install a bolt / cable 1 ; The length of the anchor rod / cable used in the experiment is l 1 , with diameter d 1 , the preload is p 1 , the time t it takes to install a laboratory anchor / cable 1 .

[0038] Taking the geological data and ...

Embodiment 2

[0049] image 3 Shown is the mechanized supporting anchor cable that can realize the physical simulation experiment, which is composed of anchor cable beam body 18, anchor cable tray 19, anchor cable rigging 20 and so on. The anchor cable bundle body 18 is made of steel strands, has bending flexibility, can withstand tangential loads, and undergoes a certain tangential deformation. In this embodiment, the actual length L of anchor cables used in the experimental simulation of the slope is 2 , diameter D 2 , preload P 2 , the time T used to install an anchor cable 2 , the geometric similarity constant C l , the stress similarity constant C σ , the time similarity constant C t :

[0050] l 2 =L 2 / C l

[0051] d 2 =D 2 / C l

[0052] p 2 =P 2 / C σ

[0053] t 2 =T 2 / C t

[0054] In the formula, the bolt / cable length actually used in the experimental simulation mine is L 2 , with a diameter of D 2 , the preload is P 2 , time T to install a bolt / cable 2 ; ...

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Abstract

The invention relates to a physical simulation experiment anchor bolt / cable mechanization support method. According to the method, models are sequentially laid on a model frame according to a similar simulation experiment ratio, after the models are dried, digging is performed, and support is performed. A rigid squeezing method is adopted for physical simulation experiment anchor bolt / cable support in the prior art, while, a support process is time consuming and laborious, and the success rate of the support is low. With the physical simulation experiment anchor bolt / cable mechanization support method of the invention adopted, the stress field of surrounding rock is just slightly disturbed, and accuracy of an experimental result can be greatly improved. According to the physical simulation experiment anchor bolt / cable mechanization support method of the invention, measuring force rings which are installed on anchor bolts / cables and are exposed at the exterior of the surrounding rock are adopted to control pre-tightening forces, the stress similarity principle of a physical simulation experiment can be satisfied, and a support effect can be improved.

Description

technical field [0001] The invention relates to physical simulation research in engineering fields such as mines and rock and soil, and in particular to a bolt / cable mechanized support method in physical simulation research in engineering fields such as mines and rock and soil. Background technique [0002] Bolt / cable mechanized support has achieved great success in engineering practice. On the one hand, it is due to the advanced support equipment, and on the other hand, it is the result of skilled operation of workers. Physical simulation experiment is one of the important research methods of mining, geotechnical, geology and other disciplines. The bolt / cable support in the experiment can be used to simulate the supporting effect of anchor rod and anchor cable on the roadway in the mining space such as working face and roadway. Provide support scheme and parameters for support in engineering practice. Therefore, the technical level of bolt / cable installation in the physica...

Claims

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Application Information

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IPC IPC(8): G01M13/00E21D20/00
CPCE21D20/003G01M13/00
Inventor 伍永平胡博胜杜文刚解盘石王红伟曹沛沛
Owner XIAN UNIV OF SCI & TECH
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