Filling body-pillar system mechanical effect mechanism test method

A technology of action mechanism and test method, applied in the direction of using stable tension/pressure to test the strength of materials, etc., can solve the problem that the bearing law cannot be systematically revealed.

Inactive Publication Date: 2016-05-04
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0003] The test has well revealed the strength change characteristics of the rock pillar in the st

Method used

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  • Filling body-pillar system mechanical effect mechanism test method
  • Filling body-pillar system mechanical effect mechanism test method
  • Filling body-pillar system mechanical effect mechanism test method

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Experimental program
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Embodiment

[0032] S1. Preparation of rock pillar specimens: According to the lime-sand ratio shown in Table 1, the preparation specifications are: The limestone specimen with a height of 100 mm was used as a substitute material for the test rock (mine) pillar, and the conventional uniaxial compressive strength test and the uniaxial loading test of the filling body-rock pillar system with confining conditions were carried out; 20 pieces, labeled Y-1, Y-2, ... Y-20 at a time.

[0033] Table 1 Grouping of filling body-rock pillar system test

[0034]

[0035] S2. Processing and preparation of self-made elastic modules: prepare the slurry according to the concentration of the filling slurry and the ratio of lime and sand designed in the experiment, add the filling slurry into a small plastic mold of 20mm×10mm×5mm and scrape the surface, and then keep it under constant temperature and humidity The curing box is cured for 28 days according to the test requirements, and it can be used as a...

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Abstract

The invention discloses a filling body-pillar system mechanical effect mechanism test method. The method comprises the steps of: processing and preparing a pillar test piece and a homemade elasticity module, and subjecting a resistance strain gauge to paste, waterproof and moistureproof treatment; pasting the pillar test piece with the strain gauge, conducting waterproof treatment, placing the pillar test piece in a middle position of a square lateral confinement steel mold; filling the steel mold with a prepared filling slurry; embedding an resistance strain gauge module treated in advance and matching with the ratio of the filling slurry; after full filling of the filling slurry in the steel mold, flattening the surface; leading and marking a wire connected to the strain gauge; taking out the filling body after certain maintenance stage; according to the testing requirements, connecting the connected wire of the embedded strain gauge with a strain gauge outside the device and carrying out a load test as required. The invention analyzes and researches on the relationship characteristic of deformation rules, rock pillar destroy characteristic and compression time of the filling body in the loading process.

Description

technical field [0001] The invention relates to the field of mechanical mechanism testing of a filling body-rock pillar system, in particular to a method for testing the mechanical action mechanism of a filling body-rock pillar system. Background technique [0002] After the filling body is filled into the underground cavity, it cooperates with the rock mass or the ore pillar to form a filling body-pillar system to control the deformation of the ore rock in the cavity. The mechanism of action has been studied by mechanical tests, and Zha Jianfeng et al. have conducted similar experimental studies to reveal the mechanism of coal gangue filling. In order to describe the interaction mechanism between the low-rigidity filling body and the ore pillar, Blight uses a steel barrel with a height of about 100mm and an inner diameter of 203mm. A cylindrical rock specimen is placed in the center of the barrel, and sand and other filling materials are filled around it according to the te...

Claims

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Application Information

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IPC IPC(8): G01N3/12
CPCG01N3/12
Inventor 孙光华赵树果刘志义薛振林姚旭龙刘祥鑫魏莎莎叶洪涛苏东良
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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