NEW VARIANTS FOR WIDE OREBODIES HIGH–CAPACITY MINING SYSTEMS WITH CONTROLLED AND CONTINUOUS IN–LINE STOPING
Akhmetkanov ©.D.K. Bitimbayev M.Zh. Lozynskyi V. Rysbekov K.B. Amralinova B.B.
2023National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2023#2023Issue 36 - 21 pp.
The work is devoted to achieving the goal of creating a cost-effective, technologically feasible and safe mining scheme for high-capacity ore bodies with controlled and in-line stoping. The directions of scientific research are methodologically grounded. Breaking-out out of ore by vertical fans (less often by parallel wells) at level excavation with tight-face blasting on a layer of the massif beaten off by the previous explosion or on a wall of the caving rock carries a danger of excessive dilution, discrepancy of particle size distribution of the beaten off mass to optimum fractional distribution and additional difficulties at release. The formation of the initial cut-off riser and the creation of a compensating space from it is also a difficult process to manage. Releasing ore under cover of the stump pillar or from undercut rock is inefficient primarily due to additional tunnelling, ore loss and dilution. In the case of sublevel caving, the amount of rock excavation for the design of transport gradients and their entry points to the sublevels is significant. The proposed technological scheme of ore blasting by means of explosive borehole fans drilled from a drill winze by a drilling unit located in the cabin of a mechanized tunneling monorail complex allows eliminating the mentioned disadvantages. In this case, the fans are drilled subparallel to the normal thickness of the ore body (perpendicular to the plane of the ore body dip).
controlled in-line mining technology , development system , drilling rooms , fan wells , wide ore bodies
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Satbayev University, Almaty, Kazakhstan
Dnipro University of Technology, Dnipro, Ukraine
Satbayev University
Dnipro University of Technology
10 лет помогаем публиковать статьи Международный издатель
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