NUMERICAL SIMULATION MODELLING OF TEMPERATURE DISTRIBUTION IN THE PROCESS OF COAL SELF-HEATING IN THE MINED-OUT SPACES
Ключевые слова:mined-out spaces, oxidation, self-heating, coal self-ignition, temperature distribution, heat conductivity, partial differential equations, numerical simulation, application program package.
Researches of thermodynamic processes of oxidation, self-heating and self-ignition of coal are
necessary for studying of dependence of terminal parameters on a set of the influencing factors. In practice of coal
mining by the underground method cases of coal self-ignition in the mined-out spaces of production units (lavas) are
frequent. In this case one of the tasks consists in determination of temperature in arbitrary point of the nubbly-porous
medium of the mined-out space. Need of the solution of this difficult task is caused by the probability of emergency
situations in places with the explosive concentration of methane. It is possible that for each seam and grade of coal it
is necessary to develop, substantiate and accept an individual indicator for assessing the state of fire hazard. It is
proposed to systematize and methodically process the results of field measurements and observations on the analyzed
and investigated cases of endogenous fires in problem areas of mines in order to create basin databases for subsequent
operational decisions in emergency situations.