Abstract
Summary Ranking the main components of organic mass by them fraction participation in carbonization allowed to determine narrower ranges of carbon change, where distinguishing features of seven stages of metamorphic transformations were established. The relationship between the direct change in the content of organic mass components and the fraction of their influence on the metamorphic transformations of coals was established, which will increase the level of predicting the dangerous properties of mine layers. The distinguishing features of metamorphic transformations in selected ranges of carbon content increase according to coal ranking by content of component of organic mass elemental composition were established. The relationships of organic mass components, which are one of the main criteria for dangerous characterization of mine layers during mining were noted. It was showed, that the choice of parameters that determine the produce of mine layers dangerous properties should be based on principles that differ from the regilations of the modern classification by genetic and technological parameters.
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