STUDIES OF THE MINING REGIME ENSURING ACHIEVEMENT OF THE MAXIMUM POSSIBLE PRODUCTIVITY OF AN ORE OPEN-PIT

Abstract

Oreextraction productivity is one of the main parameters of open pit which defines economic figures of any open-cast mining deposit.The article includes study of the following issue: determination of interrelation between operation area width and active mining operation line length in open pit, which ensures normal ore reserve and its impact on ore extraction productivity. The analysis of studies in terms of mine operational capacity and ore reserves ready to be extracted was done. It was shown that the current methods of open pit productivity based on its mining resources determination includes only length of active mining operation line but width of operation area and its impact on length of mining operation line isn’t included.The options of the mining regime ensuring the achievement of the maximum possible and planned productivity of an ore open-pit and its influence on possible solutions for determining and averaging the overburden ratio have been investigated. The fact has been established that when determining the field of mining regime regulation, it is necessary to proceed not only from the angles of highwall slope of the open-pit providing normal mining conditions, but also to take into account the possibility of achieving a given open-pit productivity of ore. It has been proved that in the development of mining operations with a minimum width of the working platform, the open-pit's productivity, based on the supply of reserves ready for excavation, will be significantly lower than the maximum possible value. It was proved that when defining the open pit productivity the length of active mining operation line and width of operation area are to be considered not separately but considering their interrelation. The results of completed studies may be used by design organizations and mining enterprises when defining mine productivity.