Future development of mechanical rocks destruction methods without blasting

Abstract

Currently, the mining industry is undergoing certain difficulties related to the mining and geological conditions became more complicated such as: to start mining at a great depth; the need to involve ores with the low valuable components into the processing; the specific gravity increase of ores mining out of low and extremely low bed seams requiring selective extraction of valuable ores. Under the circumstances the efficiency of ores mining by blasting and drilling methods decreases and the other methods and technologies of deposits development are to be worked out. To enlarge rocks destruction efficiency by powerful percussive machines claims increasing the technological and functional capabilities of this like machines, and expanding application range of technologies without blasting. Hydraulic hammers have become widespread as the attachments, however, their operating efficiency slows down at low temperatures, and they are not able to adapt to the rocks hardness change. The article proposes the design of an electromagnetic hammer developed at the Mining Institute after D.A. Kunayev, having no shortcomings as described above one. The descriptions and test results of the electromagnetic hammer are given which confirmed the possibility to manufacture it at the local factories since it is simple to manufacture and, at the same time, this design operates steadily at minus 40 ° С to plus 40 ° С temperatures, and also regulates energy of a single impact in a wide range. The arrangement of electromagnetic hammers manufacture is established to be one of the steps aimed at implementing the development program of non-commodity sectors of the economy.