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Method for obtaining stress-strain curve of filling body test block through common press

A technology of strain curve and filling body, which is applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problem of inability to measure the load-displacement curve and stress-strain curve of the filling body test block, so as to reduce the error. Effect

Inactive Publication Date: 2015-02-25
CENT SOUTH UNIV
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for obtaining the stress-strain curve of the test block of the filling body through a common press, and to solve the problem that the conventional method cannot measure the load-displacement curve of the test block of the filling body during the failure process. and the stress-strain curve problem

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  • Method for obtaining stress-strain curve of filling body test block through common press
  • Method for obtaining stress-strain curve of filling body test block through common press
  • Method for obtaining stress-strain curve of filling body test block through common press

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Embodiment Construction

[0019] The method of the present invention is: measure the height H=13.6cm of the cement-tailing sand filling body test block, the diameter R=6.6cm, and calculate the pressure-bearing surface area S=34.19cm 2 , prepare the digital camera to shoot the video of the test process. Turn on the NYL-300 ordinary press, adjust the rising loading speed of the lower platen V=0.177mm / s, wait until the pressure-bearing surface of the filling body test block touches the upper platen of the press, the pointer of the press will gradually deflect on the reading dial, and then turn on the digital The camera shoots a video of the whole process of pointer deflection on the reading plate of the press, and records the whole process from when the filling body test block begins to bear the pressure P to when the filling body test block is destroyed and unloaded. Transfer the captured video to the microcomputer, start from the test block of the filling body to bear the pressure, play back the video w...

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Abstract

The invention discloses a method for obtaining a stress-strain curve of a filling body test block through a common press, and belongs to the field of mechanical property tests of filling materials in mineral engineering. The method comprises the following steps of: adjusting the ascending speed of a lower pressing plate of the common press to be a static or dynamic loading state; calculating displacement and strain parameters according to a relationship between the motion speed of the lower pressing plate of the press and the height of the filling body test block and by combining playback videos; obtaining a load and stress parameters of the corresponding time by combining the playback videos; processing data through drawing software to generate a load-displacement curve and the stress-strain curve of the filling body test block for production guidance and deep research. The basis can be provided for a filling design of a goaf by analyzing the failure characteristics of the whole process of a filling body. The method provided by the invention is simple, convenient, economic and accurate.

Description

technical field [0001] The invention relates to a method for obtaining the stress-strain curve of a filling body test block through an ordinary press, which can be used for the mechanical performance test of filling materials in various mine filling projects. The video playback method is tested. The invention is mainly applied to filling bodies prepared by different filling materials used in metal mines, coal mines and nonmetal mines, and belongs to the technical field of mining engineering. Background technique [0002] In various mine filling projects, in order to ensure the filling effect of the goaf, it is necessary to analyze the filled stope filling body to provide improvement measures for subsequent filling projects. Usually, the method of analyzing the operation data of the filling station can be used Methods: Carry out the geological drilling investigation and analysis of the quality of the goaf filling body, sample the core of the filling body drilled out, process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
Inventor 邓代强李夕兵
Owner CENT SOUTH UNIV
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