Test method of influence of space and multi-component gas on coal spontaneous combustion tendency

A multi-component and tendency technology, applied in the field of testing, can solve the problems of poor accuracy of test results, lack of research on the natural tendency of multi-component gases in spatial characteristics, etc., and achieve the effect of high accuracy and high accuracy of test results.

Inactive Publication Date: 2016-09-28
CHONGQING UNIV
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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a kind of test method that space and multi-component gas have influence on coal spontaneous combustion tendenc

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  • Test method of influence of space and multi-component gas on coal spontaneous combustion tendency

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] The test method of the influence of space and multi-component gas on the tendency of coal spontaneous combustion in this embodiment comprises the following steps:

[0023] 1) adjust the height of the inner cavity of the reactor;

[0024] 2) Put the piled coal sample into the reactor;

[0025] 3) Pass three kinds of gases with specified components, fluxes and concentrations through the three gas inlets on the reactor;

[0026] 4) Adjust the temperature of the oil bath outside the reactor so that the oil bath temperature is always equal to the self-heating temperature of the coal sample;

[0027] 5) Turn on the fan arranged on the end surface of the gas inlet side of the reactor to control the ventilation state in the reactor;

[0028] 6) Collect the inner cavity temperature and cavity wall temperature in various places in the reactor through th...

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Abstract

The invention discloses a test method of influence of space and multi-component gas on coal spontaneous combustion tendency. The method includes the steps: adjusting the height of an inner cavity of a reactor, introducing a plurality of gases with different specified components, fluxes and concentrations, acquiring inner cavity temperatures and cavity wall temperatures of various positions in the reactor, recording the concentrations of various gas components in the reactor by a gas concentration analysis system, recording the total time of coal stacker sample spontaneous combustion ignition, analyzing the temperature rising gradient dT/dt after the temperature is 70 DEG C, and finding out the relationship between the gas component concentration and the coal sample spontaneous combustion tendency through comparison of data recorded by the data acquisition system and the gas concentration analysis system and the like. The test method can more truly simulate the coal mine goaf height, and studies the influence of spatial characteristics on the coal spontaneous combustion ignition tendency, the influence of the multi-component environment gas on the coal spontaneous combustion tendency, and the influence of goaf ventilation conditions on the coal spontaneous combustion tendency; and the accuracy of the test result is higher.

Description

technical field [0001] The invention relates to a test method, in particular to a method for measuring coal spontaneous combustion tendency affected by environmental factors. Background technique [0002] In the process of coal mining, it is inevitable that some residual coal will be left in the goaf. Low-temperature oxidation reaction will occur between the coal left in the goaf and the air, which will cause the coal to self-heat. Spontaneous combustion of coal can cause underground fires; exposure to gas can also cause more serious gas explosion accidents. [0003] Existing coal spontaneous combustion tendency measurement methods and goaf simulation equipment rarely consider the influence of goaf ventilation conditions on coal low-temperature oxidation and self-heating; the spatial characteristics (roof height) of gobs are also determined by the reaction The device is determined in advance and cannot be adjusted freely. At the same time, the concentration of each compon...

Claims

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Application Information

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IPC IPC(8): G01N31/12G01N33/22
CPCG01N31/12G01N33/222
Inventor 李林王亮陈结姜德义余明高储庭湘郭品坤
Owner CHONGQING UNIV
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