关键词: 煤自燃, 高地温, 耗氧速率, 放热强度, 极限参数

Abstract: Aiming at the question of the effect of high ground temperature environment in deep mine on limit parameters of coal spontaneous combustion, the method of temperature programmed experiment was used, and the experimental design of one coal sample was dealt with 40 ℃ constant temperature, the other coal sample was rose temperature from normal temperature was carried out to research the coal spontaneous characteristics, after calculation of the oxygen consumption rate, CO and CO2 generation rate, heat release intensity of the two coal samples, the change rules of limit parameters of coal spontaneous combustion were got. The experiment results showed that, the oxygen consumption rate, CO and CO2 generation rate, heat release intensity of the coal sample that was dealt with 40 ℃ constant temperature were higher than the coal sample that was rose temperature from normal temperature, its minimum float coal thickness and lower limit oxygen concentration extremum decreased, and upper air leakage intensity increased, and the rate of change with coal temperature almost linearly increased, which demonstrated high ground temperature led to the oxidation exothermicity enhanced of coal, thermal storage and self-heating was more easily, and the risk of spontaneous combustion increased.

Key words: coal spontaneous combustion, high ground temperature, oxygen consumption rate, heat release intensity, limit parameters