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Method for testing critical gas pressure and delay time of delayed outburst

A technology of delay time and gas pressure, applied in the direction of applying stable tension/pressure to test material strength, measuring devices, suspension and porous material analysis, etc., can solve disaster accidents, untimely problems, etc.

Active Publication Date: 2019-09-20
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, simply using 0.74MPa as the critical gas pressure for delayed outburst is likely to cause untimely forecast of outburst, and even cause serious disasters and accidents.

Method used

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  • Method for testing critical gas pressure and delay time of delayed outburst
  • Method for testing critical gas pressure and delay time of delayed outburst
  • Method for testing critical gas pressure and delay time of delayed outburst

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Embodiment Construction

[0035] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:

[0036] The method for testing the critical gas pressure and delay time of delayed outburst of the present invention includes: the preliminary preparation stage, the delayed outburst breeding stage, the delayed outburst induction stage, the end of delayed outburst and the follow-up work;

[0037] The detailed steps are:

[0038] 1a) Take samples from the outburst coal seam in the coal mine area to be tested and conduct on-site investigations, use the coal samples collected on site to measure the relevant parameters of the outburst coal seam, and determine the test plan;

[0039] 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;

[0040] 1c) Put the 6% moisture content coal sample into the visualizatio...

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Abstract

A method for testing critical gas pressure and delay time of delayed outburst is suitable for simulated down-hole use of a coal mine in a lab. The critical gas pressure and delay time of delayed outburst is tested in the lab. The method comprises an early-stage preparation phase, a delayed outburst inoculation phase, a delayed outburst induced phase, ending of delayed outburst and subsequent work. A coal sample is heated, different pressures of gas are filled, a wax sealed cylinder is used to simulate gas outburst, coal and gas delayed outburst is simulated, the critical gas pressure of delayed outburst under different conditions is determined, and delay time of delayed outburst under different conditions is determined. Steps are simple, the detection effect is good, and the practicality is high.

Description

technical field [0001] The invention relates to a method for testing the critical gas pressure and delay time of delayed outburst, in particular to the method for testing the critical gas pressure and delay time of delayed outburst of coal sample gas in an indoor test. 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 is an extremely complicated mine gas dynamic phenomenon encountered in coal mine production. gas. Delayed outburst of coal and gas refers to that outburst does not occur when the coal wall is just blasted, but is delayed after a few minutes to several hours of coal lifting. Although the relative number of delayed outbursts is relatively small, due to their unique concealment, lag, and su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N15/08
CPCG01N3/12G01N15/0826G01N2203/006G01N2203/0256G01N2203/0694
Inventor 张超林李忠辉王恩元刘晓斐刘贞堂
Owner CHINA UNIV OF MINING & TECH
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