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Experimental method for continuously compressing and tamping filling body test piece

An experimental method and technology of filling bodies, applied in the direction of applying stable tension/pressure to test material strength, preparation of test samples, sampling, etc., can solve problems such as less consideration of the impact of compaction

Pending Publication Date: 2020-09-08
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem that the existing indoor filling body test pieces rarely consider the effect of compaction, the present invention provides an experimental method for compacting filling body test pieces with simple operation and detailed steps

Method used

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  • Experimental method for continuously compressing and tamping filling body test piece

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] The present invention is realized through the following technical solutions: an experimental method for continuously compressing and compacting filling body specimens, which is characterized in that it includes experimental mold assembly, preparation of basic specimens, preparation of multi-layer specimens, uniaxial compression experiments, and uniaxial creep experiments Five steps:

[0018] Step 1, there is a fixing groove 19 in the mold base 20, four connecting bolts 15 are welded at the four corners, the two main side plates 16 and the two secondary side plates 18 are connected to each other and inserted into the fixing groove 19, and then screwed into the fixing nut 10 Stabilize the fixed plate 9, use the bolted nut 1 to fix the top seat 7, connect the tamping plate 17 with the tamping rod 14, fix the tamping nut 5 and screw it into the tamping rod...

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Abstract

The invention relates to a filling body experiment method, and particularly discloses an experimental method for continuously compressing and tamping a filling body test piece. The method comprises five steps of experiment mold assembly, basic test piece preparation, multi-layer test piece preparation, uniaxial compression experiment and uniaxial creep experiment. The index of the strength characteristic of the filling body is mainly static uniaxial compressive strength; however, influence caused by tamping operation is rarely considered in an indoor experiment; especially, influence of multiple times of tamping is not consideredd; therefore, researchers need to restore the tamping influence on a goaf of an underground roadway and prepare corresponding tamped specimens to complete analysisand research in a laboratory; and the filling body strength conversion relation in an indoor stope and an in-situ stope are established; therefore, according to the experimental method for continuously compressing and tamping the filling body test piece, the preparation process of the test piece is attached to the tamping process of the underground goaf, the experimental operation method is suitable for most indoor experiments, and the test piece which is continuously tamped for multiple times can be prepared according to experimental requirements to carry out uniaxial compression and creep experiments.

Description

Technical field: [0001] The invention relates to an experimental method for compacting a test piece, in particular to an experimental method for continuously compressing and compacting a filling body test piece. Background technique: [0002] Filling and mining technology can control the stability of the roadway by backfilling the tailings and waste rocks generated during the mining process into the goaf, and at the same time reduce the stockpiling of tailings on the surface, which not only reduces the exposed area of ​​the gob, but also reduces the amount of tailings. Dam failure accidents caused by large-scale stacking. At present, the index for evaluating the strength characteristics of filling bodies is mainly static uniaxial compressive strength, but filling bodies are also affected by dynamic loads such as blasting and earthquakes in underground stopes, especially in two-step mining or layered filling mining. The influence of dynamic disturbances cannot be ignored in ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N3/02G01N3/12
CPCG01N1/286G01N3/02G01N3/12
Inventor 杨科吕鑫刘帅魏帧赵新元张继强刘文杰池小楼
Owner ANHUI UNIV OF SCI & TECH
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