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Anchor Dynamic Tensile Experimental Device and Experimental Method

An experimental method, dynamic stretching technology, applied in the direction of applying repeated force/pulsation force to test the strength of materials, etc., can solve the problems of unclear interface failure mechanisms of dynamic pulling anchors

Inactive Publication Date: 2018-04-03
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0003] At present, the static pulling experiment technology of anchor rods is relatively mature, and the interfaces of the anchoring body have been deeply understood, but the failure mechanism of the interfaces of the anchoring body during dynamic pulling is still unclear

Method used

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  • Anchor Dynamic Tensile Experimental Device and Experimental Method
  • Anchor Dynamic Tensile Experimental Device and Experimental Method
  • Anchor Dynamic Tensile Experimental Device and Experimental Method

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Embodiment

[0034] First compare Figure 1-Figure 6 Illustrate the composition of experimental device of the present invention:

[0035] A dynamic tensile test device for an anchor rod under impact load, comprising a weight, an anchor body tensile device, an impact-lever force transmission system, a measuring system, a mold for making a test piece, and the like. It is characterized in that: the impact device includes a weight 2 , a weight target 23 , an impact target 4 , and a slide cylinder 6 . The test piece is a cylindrical test piece 15 made of reinforced concrete, with test piece reinforcement 16 arranged around it, and the center of the test piece is a mine bolt 14 .

[0036] The measuring device includes an acceleration sensor 31 fixed on the upper end of the anchor rod, a PVDF dynamic load sensor 26 for measuring the dynamic load of the hammer, and a metal foil strain gauge 32 for measuring the force on the anchor rod.

[0037] The impact-lever force transmission system includes...

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Abstract

The invention discloses an anchor solid dynamic tensile testing device and method. A heavy hammer-lever device is applied, impact loads generated when a heavy hammer freely falls are converted and amplified into impact loads acting on an anchor rod, the quantity values of tensile loads borne by the anchor rod are changed by adjusting the position of a lever fulcrum, and a response rule on an anchor solid interface under different loads and different tensile speeds is researched. By the adoption of a guide device and a lever amplification device, dynamic tension of the anchor rod is achieved, and a first researched interface debonding failure rule and a second researched interface debonding failure rule have certain engineering significance in a rock burst anchoring roadway anchor solid failure mechanism.

Description

technical field [0001] The invention relates to a test device and a test method for an anchorage body under the action of a dynamic load, in particular to a production of an anchorage matrix and a tensile test method for an anchorage body. Background technique [0002] With the increase of mine mining depth, the frequency and intensity of dynamic pressure such as rockburst, rock burst, coal and gas outburst, and large area of ​​roof pressure are getting higher and higher, which has a greater impact on the stability of the surrounding rock of the mine roadway and personnel safety. big threat. [0003] At present, the static pulling experiment technology of anchor bolts is relatively mature, and the interfaces of the anchoring body have been deeply understood, but the failure mechanism of the interfaces of the anchoring body during dynamic pulling is still unclear. In 2013, Zhou Hui et al. applied for a patent "a bolt performance test device", which disclosed a test device fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/34
CPCG01N3/34
Inventor 韦四江赵尚宁李奎张盛崔峰徐学锋
Owner HENAN POLYTECHNIC UNIV
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