CONTROL OF COAL ASH OF SEAMS WITH COMPLEX STRUCTURE FOR OPEN-CAST MINING
Coal ash is one of the mail indicators that characterize its quality and suitability for use. Consumers place high demands on an average ash content and limits and stability of its values in all batches delivered. Consumers impose high requirements to average and marginal parameters of ash and stability of its indexes in all delivered batches. Mineral impurities in the coal being mined has a significant impact on the processes of its further processing (refining, coking, burning). There is an objective need to develop deposits more and more complex in structure and inhomogeneous quality. Solving contradictions of between rigid demands of consumers to coal ash and its natural irregularity of distribution requires special coal quality control systems. Analysis of the design and operational decisions, practice of mining of the deposits in Southern Yakutia shows 171 that not always the contradictions of the existing systems are eliminated. This fact reduces the efficiency of the work of the total technological chain «georesurs - consumer» and its individual units. The introduction of additional technological operations related to the control of natural and technological components of the ash is one of the ways to improve this processes. Consideration of the layers and fields sections, open-pits and concentrating mill as a single technological space allows to form a new coal flow with more uniform quality characteristics. The control of these flows on the basis of suggested measures can and should improve the quality of coal being shipped to consumers, the level of processing and efficiency of the mining and processing productions.