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Delayed outburst test method for coal and gas under high temperature, high pressure and high stress coupling

A high-temperature, high-pressure, test method technology, applied in the direction of fuel oil testing, material inspection products, measuring devices, etc., can solve problems such as easy entry into the rheological state, protracted delay, etc.

Active Publication Date: 2019-10-08
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The mechanical properties of coal under high temperature, high pressure and high stress conditions are quite different from those under conventional conditions, and it is easy to enter a rheological state, resulting in the occurrence of delayed outburst
At present, the research on coal and gas outburst is mostly focused on the outburst physical simulation test under conventional conditions, and there is a lack of an effective test method for coal and gas delayed outburst under high temperature, high pressure and high stress coupling.

Method used

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  • Delayed outburst test method for coal and gas under high temperature, high pressure and high stress coupling
  • Delayed outburst test method for coal and gas under high temperature, high pressure and high stress coupling

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Embodiment Construction

[0036] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:

[0037] A coal and gas delayed outburst test method under high temperature, high pressure and high stress coupling of the present invention, the steps are: preliminary preparation stage, delayed outburst incubation stage, delayed outburst induction stage, delayed outburst end and follow-up work;

[0038] The detailed steps are:

[0039]1a) Carry out on-site investigation by sampling the coal blocks of the outburst coal seam in the coal mine area to be tested, use the coal block samples collected on site to measure the relevant parameters of the outburst coal seam, and determine the test plan;

[0040] 1b) Use a crushing sieve to sieve the collected coal samples into coal particles with a particle size of 0-1mm, add water to the coal particles and stir to make a 6% moisture content coal sample for later use;

[0041] 1c) Put the 6% moisture content coal sampl...

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Abstract

Provided in the invention is a delayed outburst test method for coal and gas under high temperature, high pressure and high stress coupling, thereby simulating the coal-gas outburst delayed usage of the underground coal mine under high temperature, high pressure and high stress coupling in a laboratory. The method comprises a pre-preparation stage, a delayed outburst inoculation stage, a delayed outburst induction stage, a delayed outburst end, and follow-up work. A coal sample is heated; gas with different pressures is introduced; and then gas outburst is simulated by using a wax-sealed cylinder. Therefore, the coal-gas delayed outburst process under high temperature, high pressure and high stress coupling can be simulated indoors. The method has advantages of simple step, good simulationeffect and high practicability.

Description

technical field [0001] The invention relates to a coal and gas delayed outburst test method, which is especially suitable for the coal and gas delayed outburst test method under high temperature, high pressure and high stress coupling used for underground simulation of coal mines in a laboratory. Background technique [0002] Coal is the basic energy of our country, and for a long period of time in the future, the pattern of coal as the main energy of our country will not change. As of 2017, the proportion of my country's coal consumption in primary energy consumption is still as high as 60.4%. Coal and gas outburst (referred to as outburst) is an extremely complicated mine gas dynamic phenomenon encountered in coal mine production. A large amount of gas gushes out. Delayed outburst of coal and gas (referred to as delayed outburst) means that the outburst does not occur when the coal wall is just blasted, but is delayed for several minutes to several hours after the coal i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N33/22
CPCG01N33/00G01N33/222
Inventor 李忠辉张超林王恩元刘晓斐刘贞堂
Owner CHINA UNIV OF MINING & TECH
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