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Experimental method for simulating mechanical properties of gas-bearing coal under uniaxial compression

A technology of mechanical properties and uniaxial compression, which is used in material inspection products, fuel testing, preparation of test samples, etc., can solve problems such as difficulty in gas preservation, and achieve good sealing, enhanced sealing effect, and easy assembly.

Active Publication Date: 2018-06-12
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the uniaxial compression test of gas-containing coal rocks requires that there must be gas in the coal sample, and it is difficult to preserve the gas in the coal sample under uniaxial compression, so it is difficult to realize it.

Method used

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  • Experimental method for simulating mechanical properties of gas-bearing coal under uniaxial compression
  • Experimental method for simulating mechanical properties of gas-bearing coal under uniaxial compression
  • Experimental method for simulating mechanical properties of gas-bearing coal under uniaxial compression

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Embodiment Construction

[0075] Such as figure 1 As shown, the experimental device for simulating the mechanical characteristics of gas-containing coal under uniaxial compression of the present invention includes a coal sample container 15, a stress loading system, a gas filling system, a gas detector 21, a VIC-3D non-contact full-field strain measurement system, and Acoustic emission system

[0076] Combine figure 2 , image 3 with Figure 4 The coal sample container 15 includes a coal sample container shell 15-2 and a coal sample placement cavity 15-1 arranged in the coal sample container shell 15-2, and the top of the coal sample container shell 15-2 is sealed A piston 16 is connected, one side of the coal sample container shell 15-2 is provided with a first multi-purpose air hole 15-3, and the other side of the coal sample container shell 15-2 is provided with a second multi-purpose air hole 15-4 and the transparent mirror 15-5, the first multi-purpose air hole 15-3 is provided with a first sealing ...

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Abstract

The invention discloses a method for simulating the mechanical properties of gas-containing coal rock under uniaxial compression. The experimental device used includes a coal sample container, a stress loading system, a gas filling system, a gas detector, and a VIC‑3D non-contact full-field strain test method. Measuring system and acoustic emission system; the coal sample container includes a coal sample container shell and a coal sample placement chamber, the top of the coal sample container shell is sealed and connected with a piston, and one side of the coal sample container shell is provided with a first multi-purpose air hole, The other side is provided with a second multi-purpose air hole and a transparent viewing mirror; the stress loading system includes an electronic universal testing machine and a first computer; the experimental method includes steps: 1. Sample preparation; 2. Building a test device; 4. Test in a gas-free environment; 5. Test in a gas-filled environment. The invention is reasonable in design, convenient in realization and complete in function, can truly reflect that the coal pillar left underground is under one-way load, has strong practicability, and is convenient for popularization and use.

Description

Technical field [0001] The invention belongs to the technical field of coal rock mechanical property testing, and specifically relates to a simulation experiment method of gas-containing coal rock mechanical property under uniaxial compression. Background technique [0002] In recent years, with the increase of coal seam mining depth, there have been more and more dynamic disasters in gas-containing coal bodies. In order to adapt to the support requirements under high ground stress and high gas environment and prevent gas disasters, the mine support technology and gas must be strengthened. For prevention and control technology, the number of coal pillars in the well must be increased accordingly, and the remaining coal pillars are mostly under unidirectional loading (it can be considered as being in uniaxial compression). Therefore, the study of gas containing under uniaxial compression The mechanical properties of coal samples are of great practical significance for maintaining ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/22G01N1/28
Inventor 潘红宇葛迪张天军李树刚董晓刚张磊包若羽宋爽周敖蒋兴科赵云红陈佳伟范亚飞
Owner XIAN UNIV OF SCI & TECH
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