oa Coal Metamorphism and Elemental Oxygen Content

The article presents a number of analytical conclusions that allow recalculating the quality indicators of coals of the studied coal seams to a state close to the condition of mining operations, taking into account the actual ash output and total moisture. It was possible to study the ratio of the key components of the organic mass and mineral impurities, including moisture. The use of a tool for statistical processing of data obtained experimentally for the considered coal layers made it possible to determine the probable range of oxygen indicators for the working state of the fuel. The selected methods made it possible to improve the accuracy of determining the oxygen content under conditions close to those of coal mines. In turn, the ratio of oxygen with the rest of the main components of the organic mass allows us to estimate the reduction parameter, which characterizes the rate of volatile matter yield for assessing the metamorphic transformations of coal seams and is used in regulatory documents. The results obtained make it possible to prepare proposals for improving the information content of the regulatory framework in terms of predicting the hazardous properties of coal seams during mining operations