Abstract
The paper desribes the results of the analysis of the drilling and blasting index at some large enterprises. The significant period of their work has been considered. The increase in the specific consumption of explosives by years has been shown and the reasons for this increase have been explained. The issue of the development prospects of the drilling and blasting complex in terms of reducing the cost of explosives, as well as some issues associated with the use of explosives, manufactured on site. It is suggested that in the near future the development of open mining will be associated with the acceleration of processes and a significant increase in their intensity, both in the development of new ones and in the refinement of existing large open-pit mines. In this regard, drilling and blasting operations are waiting for certain changes in both the mechanization of processes and the technological methods of production. An approach is proposed for improving energy efficiency and resource saving in the production of drilling and blasting operations, which consists in applying a horizontal cut along the bottom of the bench with blasting breaking of the rock mass. It has been previously shown that the use of this method of breaking can be quite effective in comparison with the traditional approach.
Highlights
In large open-pit mines, the DBO costs are 30% of total production costs and are expected to be increased as mining is reduced
From 1975 to 2015 the Institute of Mining of the Ural Branch of RAS had accumulated a significant amount of data on the BDO of iron ore and building material open-pit mines, which makes it possible to estimate the dynamics of changes in production indicators and to establish the trend of their progress in the future
As practice shows, the narrowing of the borehole array and the increase in the specific consumption of explosives do not result in improvement of the crushing quality [7]
Summary
In large open-pit mines, the DBO costs are 30% of total production costs and are expected to be increased as mining is reduced. From 1975 to 2015 the Institute of Mining of the Ural Branch of RAS had accumulated a significant amount of data on the BDO of iron ore and building material open-pit mines, which makes it possible to estimate the dynamics of changes in production indicators and to establish the trend of their progress in the future. It should be noted that the Uralasbest plant has data only since 1990. A comparison of the DBO indicators and their averaging for the estimation of the dynamics of. Change has been carried out for 9 MPS and separately for 8 MPS of iron ore deposits without taking into account the data of the Uralasbest combine
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