Authors: M.A. Tyulenev, S.O. Markov, T.N. Gvozdkova, Palamarchuk , A.V. Seleznev, N.S. Suradeev, Esin

Title of the article: Study of structures of excavation schemes for backfilling of internal multi-tier transportless dumps

Year: 2022, Issue: 4, Pages: 4-34

Branch of knowledge: 2.8.8 Mining machines, geotechnology (engineering)

Index UDK: 622.271.3

DOI: 10.26730/2618-7434-2022-4-4-34

Abstract: The general direction of this work is to increase the level of use of dragline excavators when working according to transportless technological schemes. As it is known, the indicators of work improvement can be reduction of re-excavation coefficient; increase of height of rock thickness, mined out by transportless technology; reduction of working time for organizational interactions of related technological processes. Theoretically, to solve this problem, it is necessary to justify the capacity of multi-tier internal dump, because it depends on the width of the stope, the slope angle of the dump bottom, the number of dump tiers and the order of distribution of the rock entering the dump into the dump tiers. If over the upper layer of the mined rock formation there will be an additional increment of the rock, i.e. in fact there will be an increase in the thickness of the rock mined by transportless (direct dumping) technology, it will be necessary to fill an additional tier in the dump. In such a case, it is necessary to develop a new excavation scheme structure that meets the following requirements: to ensure maximum dump capacity; to ensure the lowest re-excavation factor; to ensure minimum time spent on organization of dragline operation and interaction of related technological processes (drilling and blasting; winning operations). This article discusses possible options for forming the structure of transportless excavation schemes, provides mathematical models of the capacity of the multi-tier internal dump, and calculates the indicators of transportless development of the stope in the rock strata, taking into account the organization of technological processes.

Key words: transportless technology flat seams open-pit mining dragline internal dump dump capacity excavation scheme direct dumping

Receiving date: 15.10.2022

Approval date: 29.11.2022

Publication date: 27.12.2022

CITE DOWNLOAD