Turchenko D. Improvement of quality and rank of coal as the index of efficiency increase at coal mining enterprise

Object of study: enterprises of coal mining. .Purpose of study: increasing of efficiency of coal mining. Methods of study and equipment: technical-econmic and logical analysis, methods of mathematical statistics, economy-mathematical modeling.Theoretical and practical results: decision of actual scientific problem of raising efficiency of coal production as a result improvement of standard qualities of coal and getting new goods from it.Novelty: study to evolutions a contents of quality of coal. Subject and degree of introduction: recommendations for perfecting and quality deversifications. Efficiency of introduction: increasing of efficiency of coal production. Sphere (branch) use: fuel-energy complex.