Geological, mining-technical and economic criteria of extracting residual parts of hard coal seams

The procedure leading to rationalization of decision making about whether or not to extract a residual part of a coal seam were described. An algorithm for assessing possibilities of extracting residual hard coal seam parts were presented. Research outcomes of determining geological and mining-technical criteria for assessing possibilities of extracting residual hard coal seam as well as for selecting aocrooriate extraction technologies were presented. The method of economic analyses for assessing projects of extracting of residual hard coal seam parts was described and practical example was provided. The following research methods were used within the performed investigations: opinion poll (survey), taxonomic methods, factor analysis and economic analyses.