RESEARCH OF THE CONDITION OF REGIONAL PARTS OF MASSIF AT LONGWALL MINING OF PRONE TO SPONTANEOUS IGNITION COAL SEAMS

Main objective of the executed researches was assessment of the strain-stress condition of regional parts of pillar for definition of a possibility of formation of coal congestions, prone to spontaneous ignition, in goafs of extraction longwall panels. Analytical researches were carried out for the wide range of geological and mining conditions of mining of flat coal seams by longwall. When performing researches equations for definition of the strain-stress condition of regional parts of the coal pillar were used. As a result of researches the sizes of zones of critical condition for various conditions are determined and the conclusion is drawn on need of accounting of a condition of regional parts of coal pillars for an exception of conditions for emergence of the endogenous fires. The novelty of research consists in taking note of a condition of regional parts of coal pillar and establishment of dependence of the strain-stress condition of regional parts of coal pillars on the major mining-andgeological factors.