SPONTANEOUS COMBUSTION OF COAL AND EFFECTING FACTORS

Abstract

Coal tends to adsorb oxygen and oxidize due to its structure. Spontaneous combustion mechanismof coal is very complicated, and still this mechanism is not completely understood. However, coaloxygencompound theory is widely accepted by researchers nowadays. According to this theory,spontaneous combustion consists of slow oxidation, accelerating oxidation and rapid oxidationstages. In these stages, the physical oxygen adsorption, chemical oxygen adsorption and freeradicals reactions are the dominant mechanisms, respectively. Spontaneous combustion of coalcan occur without any external impact anywhere coal and / or coal wastes exist. Nowadays, itsrevealed that some common thoughts about the effecting parameters on spontaneous combustionof coal are wrong. For example; spontaneous combustion of coal does not occur only in low rankcoals, and high pyrite content coals may have low spontaneous combustion tendency or coalmines which were determined as not risky can unexpectedly combust. Therefore, spontaneouscombustion tendencies of coals must be determined; all stages such as mining, stockpile designand transportation must be planned in detail; continuous monitoring and emergency responseplans must be arranged in case a spontaneous combustion.

Özet

Kömür yapısı gereği oksijeni adsorplamaya ve oksidasyona yatkındır. Kömürün kendiliğinden

Keywords: Kömürün kendiliğinden yanması, Kömürün oksidasyonu, Kömür stokları, Kömür-Oksijen birleşiği kuramı, Kömür madeni güvenliği