Regulation of contours of surface mining operations
The article contains a brief analysis of analytical and graphic-analytical methods of open-pit contour design based on the optimization of costs of overburden removal, development and mining processes with the use of different types of overburden ratio. The authors discuss dynamic methods of the assessment of economic efficiency of variants of the limiting contours of surface mining operations used for planning of mineral deposit development by surface mining methods. An improved method is proposed based on the dynamic approach to the substantiation of the boundaries of surface mining operations at large coal deposits, with due account for coal price fluctuation, performance and economics and engineering performance standards of a mine. Case studies are presented of the method implementation at some large coal deposits.