Isakov B.B., Chetveryk M.S. Perspective trends for the development of cycle-flow technology in deep quarries taking into account the structure of their working area

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Parent Category: Geo-Technical Mechanics, 2021

Category: Geo-Technical Mechanics, 2021, № 159

Geoteh. meh. 2021, 159, 89-95

https://doi.org/10.15407/geotm2021.159.089

 

PERSPECTIVE TRENDS FOR THE DEVELOPMENT OF CYCLE-FLOW TECHNOLOGY IN DEEP QUARRIES TAKING INTO ACCOUNT THE STRUCTURE OF THEIR WORKING AREA 

¹Isakov B.B., ²Chetveryk M.S.

¹Kazakh National Research Technical University named after K.I. Satpayev, ²Institute of Geotechnical Mechanics named by N. Poljakov of NAS of Ukraine

UDC 622.271.326

Language: English

Abstract. Over the past 20 years, the parameters of the working zone of deep quarries have changed, which began to consist of sections of inclined and steep sides. At a number of deep iron ore quarries, temporary internal dumps of overburden rocks began to be created in the working area, which influences the choice of schemes for opening deep horizons in cyclic-flow technology (СFT).
The purpose of the study is to substantiate promising directions for the development of CFT in deep iron ore quarries, taking into account the structure of their working area and the use of steeply inclined conveyors (SIC).
It is shown that with certain parameters of a large piece transported by the conveyor belt, contained in the transported rock mass, and its certain kinetic energy, stable operation of the system, widely used steeply inclined and inclined conveyors, is achieved.
The parameters of a steeply inclined conveyor when transporting rocks with a high density were determined. It is assumed that with the same kinetic energy of a piece (ore, rock) contained in the transported rock mass, stable operation of a steeply inclined conveyor will be ensured.
Based on this, the parameters of the transported piece and the parameters of the steeply inclined conveyor are determined. According to the maximum size of the pieces that come after crushing in a cone crusher for coarse crushing on a steeply inclined conveyor, its stable operation is ensured at a density of transported rocks of not more than 2.8 t/m3. The economical use of SIC is achieved by combining the cyclic-flow technology with SIC and with the technology of pre-enrichment of ore in a quarry. For these conditions, the use of cyclic-flow technology with steeply inclined and inclined conveyors is justified.
The structure of the working zone of a deep quarry with gentle and steep sides is considered. For these conditions, rational schemes for the opening of horizons with steep sides of the open pit and the use of temporary internal dumps was developed.
The depth of the quarry, at which it is necessary to introduce a new opening scheme, was established. It is shown that the time of transition to the next opening scheme is significantly affected by the productivity of the quarry and the rate of decrease in mining operations.
Keywords: working area of a quarry, steeply inclined conveyor, cyclic flow technology, piece size, conveyor speed

 

REFERENCES:

1. Palke, J. and Gyunther, R. (2003), “Expanding the scope of FLEXOWELL and POCKETLIFT vertical conveying systems by using high strength steel and Kevlar tensile elements”, Mining Journal, no.1, pp. 16- 48.

2. Chetverik, M.S., Babiy E.V. and Bubnova, E.A. (2016), “The relationship between the parameters of mining machines, technology and processes in the open-pit mining of ores”, Geo-Technical Mechanics, 2016, Issue 126, pp. 58-70.

 

About authors:

Isakov Bakhitzhan Bauirzhanovych, Master of Sciences, Postgraduate Student, Kazakh National Research Technical University named after K.I. Satpayev, Almaty, Republic of Kazakhstan

Chetveryk Mykhailo Serhiiovych, Doctor of Technical Sciences, Professor, Leading Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, Institute of Geotechnical Mechanics named by N. Poliakov of National Academy of Sciences of Ukraine (IGTM of NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

 

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