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A kind of test device and test method for simulating deep formation bolt pull-out test

A pull-out test and test device technology, applied in measurement devices, optical devices, preparation of test samples, etc., can solve the problem of inability to truly simulate the pull-out test of the anchor, inaccurate temperature control, and failure to reflect the anchorage. The effect of confining pressure, etc., to achieve the effect of accurate and efficient monitoring, convenient operation and simple production

Active Publication Date: 2021-11-05
ANHUI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent application number: 201410813728.6 "Anchoring Material High Temperature Drawing Experimental Device and Experimental Method" discloses an anchoring material high temperature drawing experimental device and its experimental method. This patent application can realize the drawing experiment of anchoring material at high temperature, but The technical scheme adopted by it only simulates the pull-out test under the influence of temperature, and there is a certain gap with the real deep formation under the influence of "three highs" when the bolt and anchor are pulled out, and it cannot truly simulate the real "three highs" environment. The bolt pullout test situation
[0005] The published academic papers "The Effect of Water and Temperature on the Anchor Force of Resin Anchor" and "Research on the Mechanical Properties of Resin Anchor Agent for Full-length Prestressed Anchor" focus on the pull-out test of anchor bolts under the action of temperature and water. , but the effects of temperature and water on bolt anchorage are studied separately, and it does not reflect the effect of confining pressure on the anchor
Moreover, in the test of the influence of temperature on the anchorage of resin anchors, the temperature control is not accurate

Method used

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  • A kind of test device and test method for simulating deep formation bolt pull-out test
  • A kind of test device and test method for simulating deep formation bolt pull-out test
  • A kind of test device and test method for simulating deep formation bolt pull-out test

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Effect test

Embodiment 1

[0048] like Figure 1-3 , The present invention provides a simulated deep strata bolt drawing the preform is placed within the tank test pressure of the working device 11, the concrete test device 6, is reserved for anchor bolt holes 4 for placing concrete 14 6, test apparatus comprising: a pressure supply means, and means for drawing infiltration mechanism;

[0049] The pressure supply mechanism including a rubber water bag 8, the water supply pipe 17 and the water bag pressure control device 12, the rubber bag package 8 to the outside through pressure of the working tank, a water supply pipe 17 in the circumferential bag 6 of the concrete 11 and communicates water rubber 8 bags, water bags with water supply tube 17 pressure controller 12 for controlling the flow rate of water flow and temperature in the rubber bag 8; control water pressure gauge 12 may be employed for temperature control of the temperature-controlled heating rods the water supply pipe 17 for heating the water bag...

Embodiment 2

[0065] like figure 1 , In the present embodiment, in order to ensure that during the test the force pulling the bolt 4 is subjected to a vertical axial force provided level on the test device, particularly for the practice: in Test Example 1 on the base unit, the fixing plate 11 of the front body and the front pressure of the working tank 15 are provided a pointer or bubble level, and the level are positioned on a plate fixed to the bolt 4 and the front surface pressure of the working front 15 of the tank, particularly during the early trial, when a vertical force is an axial force to bear non-anchor, a pointer or bubbles will be displayed simultaneously, so as to provide a direction correcting force is applied to the test persons in accordance with. Other structure of the embodiment of the test device of the present embodiment is the same as in Example 1, which is not fully repeated herein ,, the use of the present invention can control the temperature of the rubber bag 8 pairs o...

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Abstract

The invention provides a device and method for simulating a bolt pullout test in deep formations. The pullout test device includes a pressure supply mechanism, a seepage supply mechanism, and a pullout mechanism. The rubber water bag is used to squeeze the concrete package to simulate a certain temperature. The pressure of the surrounding rock in the roadway below is simulated by using the seepage water in the seepage pressure storage tank to simulate the seepage pressure in the roadway, and the pulling of the bolt by the jack of the hollow plunger is used to simulate the pressure caused by the bolt in the bolt support mode. In the process, the pulling distance is measured by the axial displacement measuring device, the pulling force exerted by the hollow plunger jack is recorded by the pressure sensor, and the pulling force is measured by the axial displacement measuring device. The pulling distance is recorded by the fiber grating strain sensor to record the stress and strain of the bolt during the pulling process; the invention can provide corresponding accurate theoretical basis for the support design of deep underground roadways.

Description

Technical field [0001] The present invention belongs to the technical field of mine simulation apparatus, particularly relates to a pull-out test apparatus and test method for simulating deep strata bolt. Background technique [0002] As the coal is gradually mining to deep, deep underground workings by highland stress, high geothermal and high seepage i.e., "three high" impact, a large number such as: soft expansion of roadway, crushing of roadway, the roadway by Temperature and Ground Water and other complex and difficult roadway, before the job need to be roadway support these complex difficulties roadway; anchor support system since been applied to mine roadway support, with its fast, efficient and take up less space, and economic advantages obtained engineering recognition of staff, has been widely used in mining, tunnel, water conservancy, slope and other geotechnical engineering. Bolt anchoring effect depends on understanding the mechanism of its anchor, and anchor mechani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01B11/16G01N1/28
CPCG01B11/16G01N1/28G01N3/08G01N2203/0017G01N2203/0075G01N2203/0226G01N2203/0232
Inventor 刘小虎李万峰程桦姚直书薛维培
Owner ANHUI UNIV OF SCI & TECH