SETS OF COAL SEAMS BY HYDROGEN CONTENT IN THE ORGANIC (COMBUSTIBLE) MASS AND MINERAL IMPURITIES OF FOSSIL COALS

Purpose: to establish a set of coal seams of the same degree of metamorphic transformations of coals, differing in different elemental hydrogen content, reduced to the conditions of mining operations, taking into account the content of mineral impurities and moisture.. Methodology: based on statistical processing of experimental reference data of indicators of consumer qualities of solid fuel using information about the elemental content of the main components of the combustible mass and ash components, as well as reservoir ash content and moisture content of coal samples for their different state. Results: a different direction of change in the elemental content of hydrogen in analytical samples and recalculated for the working state of seam samples with an increase in the processes of metamorphic transformations of coals (increase in carbon content) has been established. Three sets of coal seams formations have been identified, differing from each other in the level of elemental hydrogen content in the working state of the fuel at the same degree of metamorphic transformations. Empirical dependencies are proposed for the formation of sets of coal seams by the factor of the elemental content of hydrogen on the working state of coals. To improve the regulatory framework for the safe conduct of mining operations, in terms of predicting the manifestation of hazardous properties of coal seams, it is proposed to take into account the influence of the content of mineral impurities on the total ash output from seam samples. Scientific novelty: for the first time, three samples of coal seams formations have been established, for which an increase in the elemental content of hydrogen in the working state of the fuel is observed with an increase in the degree of metamorphism (an increase in the carbon content). Practical value: the obtained scientific results allow them to be used to improve the regulatory framework for the safe conduct of mining operations in predicting the manifestation of hazardous properties of coal seams.