A comprehensive test method for mechanical properties of mine support materials
A technology of material mechanics and comprehensive testing, which is applied in the direction of using stable shear force to test material strength, and using stable tension/pressure test to test material strength, etc. The method is simple and reasonable, the effect is good, and the effect is widely used
Inactive Publication Date: 2019-09-27
HENAN POLYTECHNIC UNIV
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Problems solved by technology
[0003] In view of the above situation, in order to solve the defects of the prior art, the purpose of the present invention is to provide a comprehensive test method for the mechanical properties of mine support materials, which can effectively solve the problem that the current test method cannot comprehensively test the shear performance of the anchor rod, so that it can be realized at the same time. Tests on the tensile and shear properties of anchor rods (cables), tensile and shear properties of anchors, compressive performance tests of U-shaped steel brackets, and compression tests of mine support components
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[0013] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0014] Depend on Figure 1-7 Provide, the present invention utilizes mine support material mechanical property comprehensive testing device, then carries out following test procedure:
[0015] 1) Tensile test of anchor rod and anchor cable: when performing comprehensive testing of the mechanical properties of mine support materials, first fix the comprehensive test device for the mechanical properties of the entire mine support material on the ground that has been treated with cement. When pulling performance, the vertical servo actuator 1 is fixed on the top of the upper beam 2 by bolts, and the vertical servo actuator 1 and the upper beam 2 are provided with supporting force through the column 4, and the tension sensor 3 and the chuck 6 Linked by the chuck guide frame 5, the chuck 6 can move in the vertical direction ...
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Abstract
The invention relates to a comprehensive mine support material mechanical property testing method and aims to solve the problems that the shearing resistance of an anchor rod cannot be comprehensivelytested, that is, the properties of tension and shearing of the anchor rod, the tension and shearing properties of an anchor body, the pressure resistance of a U-shaped steel bracket, and the compression of a mine support component, cannot be tested by using a conventional testing method. According to the technical scheme of the invention, the method comprises the following steps: 1) performing tension testing on an anchor rod cable; 2) performing mechanical testing on a support component; 3) performing shearing testing on an anchor rod and an anchor body; 4) performing comprehensive pull andshearing testing; 5) performing performance detection data output. The method provided by the invention is simple and reasonable, good in effect, capable of measuring force through a high-precision load sensor, wide in application and simple and easy to operate, and is a great innovation of comprehensive mine support material mechanical property testing methods.
Description
technical field [0001] The invention relates to the field of mine support, in particular to a method for comprehensively testing the mechanical properties of mine support materials. Background technique [0002] With the increasingly complex mining conditions, various joint support forms based on anchor net support are generally used in the roadway, but the effect is mediocre. The reasons are as follows: (1) After the mine enters deep mining, the mechanical state of the mine roadway supporting materials becomes more and more complicated. In the anchor net support system, the anchor rod (cable) is not only subjected to tensile / compressive stress, but also shear stress, and the deformation and failure of the anchor rod (cable) is largely due to the result of shearing. The testing equipment does not have tensile-shear mechanical performance test, especially the shear performance under the anchored state; (2) There are serious defects in the rational matching of anchor-mesh sup...
Claims
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IPC IPC(8): G01N3/08G01N3/24
Inventor 张辉李国盛刘少伟贾后省徐佑林李兴旺王俊峰郑伟李梦珍
Owner HENAN POLYTECHNIC UNIV