Conducted review of methods of calculation of productivity of open-pit excavators and results of verification calculations shows that, there is no uniform method that counts constantly changing physical and mechanical properties of developed rocks, technological parameters of a face, design and force parameters of an excavator, probability of its no-failure operation, casual character of transport delivery, qualification of the excavator operator, climatic conditions. Calculation of productivity of open pit excavators under specific mining and geological conditions is made for planning and rationing of excavation and loading machines, the choice and provision of transport, and establishment of a rational mode of their operation. In the given conditions of open-cut mining, an excavator’s productivity depends on many natural, mining-technological, and organizational factors, which are difficult to take into account and largely interact with the design parameters of open-pit excavators. In fact, most of the factors are probabilistic in nature. As a consequence, it is advisable to define values of productivity for each individual case based on the cumulative account of changes in multifactorial conditions of operation and technical condition of technologically connected equipment. In this regard, it is of interest to determine the value of productivity of quarry excavators with the account of the stated factors.
The scientific paper reviews operation and operating conditions of deep pits. The division of the quarry field into natural-technological areas and their classification have been made. The work also provides schemes of division of the open pit field into conventional natural-technological zones and of complex mechanization of natural-technological zone by the cyclic action equipment. The dependence of the rate of mining decline on the width of the working site has been maintained. Strategic technical solutions to help manage mining manufacture and complex continuous planning and design of mining operations as well as division of working space into pit zones, have been elaborated. A nomogram for determining the parameters of excavation blocks based on the rate of decline of mining works for different sizes of excavators and a structural scheme of complex mechanization of natural and technological zones by cyclic-flow technology have been provided.
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