Abstract
Coal oxidation by air oxygen can cause a process of spontaneous combustion with intense emission of carbon oxide and danger to initiate explosion of combustible gases. To detect the process of coal spontaneous combustion in mines, they use a gas analysis method providing control of concentrations of carbon oxide, hydrogen and hydrocarbons in the atmosphere. The conducted researches showed that at low-temperature oxidation of coal the intense emission of these gases without temperature increase is possible. Concentration of carbon oxide significantly increases with the growth of coal oxygen sorption rate. Ethylene and carbon dioxide show similar regularities. Acetylene is not found as a result of low-temperature oxidation of coal, and emission of hydrogen, methane, ethane, propane and propylene does not depend on the coal oxygen sorption rate.
Highlights
Coal mining is accompanied by a number of dangerous phenomena threatening health and life of a person
At low-temperature oxidation of coal the increase in the coal oxygen sorption rate leads to the essential growth of carbon oxide emission into the atmosphere that can be mistakenly treated as development of thespontaneous combustion process
Emission of ethylene and carbon dioxide at low-temperature oxidation happens in the wide range with the general tendency of growth of gas emission at increase of the coal oxygen sorption rate that complicates use of these gases as indicators of the spontaneous combustion process at the early stage of development
Summary
Coal mining is accompanied by a number of dangerous phenomena threatening health and life of a person. The process of coal spontaneous combustion in mine is followed by emission of such toxic gas as carbon oxide, and lowering of concentration of oxygen in the underground air.
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