经过多年试验研究之后,匹兹堡研究中心的研究人员根据煤的自燃潜能对煤炭进行分类。从中得出了一个能用来预报井下引起煤自燃的环境温度的简便公式。 矿业局研究人员在实验室测定了14个煤层中19种烟煤样品的相对自燃潜能。他们用一种绝热烘箱测定了每种煤的最低自热温度(即在煤中开始发生持续放热反应或热散发的最低温度)。然后把测得的温度与用同样方法测得的其它煤种的最低自热温度相比,排列出各种煤的相对自热趋势。最低自热温度越低,煤的自燃潜能越大。 在绝热烘箱内测定结果与煤的自热趋势应 After years of experimental research, researchers at the Pittsburgh Research Center classify coal based on its spontaneous potential. From which a simple formula that can be used to predict the ambient temperature of spontaneous combustion of coal in the well is derived. Mining Bureau researchers measured the relative spontaneous combustion potential of 19 bituminous coal samples from 14 coal seams in the laboratory. They used an adiabatic oven to determine the lowest self-heating temperature for each coal (the lowest temperature at which continuous exothermic reactions or heat emissions begin to occur in the coal). The relative self-heating tendency of the various coal is then ranked by comparing the measured temperature with the lowest self-heating temperature of other coal species measured by the same method. The lower the lowest self-heating temperature, the greater the spontaneous combustion potential of coal. Determination of adiabatic oven results with the self-heating coal should be