Geological models of Donetsk coals formation (experience of system research)

Geological characterization of coal formation processes is given. The systems of coal formation including natural factors, which determine the properties and composition of fossil coals, are considered. The principle of classification of Donetsk coals on the basis of system approach is substantiated. The questions of discontinuous-continuous series of coal metamorphism are discussed and alternative models of formation of coals of different recoverability are offered, as well as the principles of selection of coal classification scales.