Distinguishing method of three zones of spontaneous combustion of high-gas gob
Active Publication Date: 2012-10-24
GL TECH CO LTD
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Therefore, the current division standard of oxygen concentration will be affected by the gas decomposed in the coal seam, so it cannot accurately and objectively reflect the decrease of oxygen concentration caused by the increase of the oxidation intensity of the remaining coal, thus leading to the "three zones" of spontaneous combustion in the goaf The division is not accurate enough
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[0015] The method for discriminating the "three zones" of spontaneous combustion in a high-gas goaf provided by this embodiment adopts the oxygen-nitrogen concentration ratio n as the discrimination standard, and the oxygen-nitrogen concentration ratio n=volume percentage concentration of oxygen in the gas sample of the gob / sample The volume percentage concentration of nitrogen in the air sample in the empty area, the area where n≥0.221 is the non-spontaneous combustion zone for heat dissipation, the area where 0.1117≤n<0.221 is the possible spontaneous combustion zone, and the area where n<0.1117 is the asphyxiation zone.
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The invention discloses a distinguishing method of three zones of spontaneous combustion of a high-gas gob. According to the distinguishing method, oxygen-nitrogen concentration ratio n is used as a distinguishing standard, wherein the oxygen-nitrogen concentration ratio n is equal to the ratio of volume percentage concentration of oxygen in a gob gas sample to the volume percentage concentration of nitrogen in the gob gas sample; a zone of which n is greater than or equal to 0.221 is a radiating non-spontaneous-combustion zone; a zone of which n is greater than or equal to 0.1117 and is less than 0.221 is a possible spontaneous combustion zone; and the zone of which n is less than 0.1117 is a choking zone. According to the distinguishing method of the three zones of spontaneous combustion of the high-gas gob, the consumption condition of the oxygen in the gob gas is more accurately reflected, and a more scientific and accurate method is provided for distinguishing the three zones of spontaneous combustion of the high-gas gob.
Description
technical field [0001] The invention relates to the technical field of coal mining industry, in particular to a method for distinguishing "three zones" of spontaneous combustion in high-gas goaf areas. Background technique [0002] According to the basic conditions of coal spontaneous combustion, the coal spontaneous combustion in goaf can be roughly divided into three zones, that is, the non-spontaneous combustion zone of heat dissipation, the possible spontaneous combustion zone and the suffocation zone. At present, there are three standards for dividing the "three zones" of spontaneous combustion, namely: dividing the "three zones" of spontaneous combustion based on the air leakage intensity in the goaf, dividing the "three zones" of spontaneous combustion based on the oxygen concentration in the goaf, and dividing the "three zones" of spontaneous combustion based on the air leakage intensity in the goaf. The temperature distribution in the empty area is divided into "thr...
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IPC IPC(8): E21F17/00
Inventor 杨胜强胡新成宋万新鹿存荣杨相玉严家程路培超刘垒
Owner GL TECH CO LTD