Babii K.V., Chetverik M.S., Ikol O.O., Malieiev YE.V., Kuantay А.S. Technical and technological solutions regarding the development of pillars during final mining of deep open pits

Details
Parent Category: Geo-Technical Mechanics, 2023
Category: Geo-Technical Mechanics, 2023, Issue 165

Geoteh. meh. 2023, 165, 129-138

https://doi.org/10.15407/geotm2023.165.129

 

TECHNICAL AND TECHNOLOGICAL SOLUTIONS REGARDING THE DEVELOPMENT OF PILLARS DURING FINAL MINING OF DEEP OPEN PITS

1Babii K.V., 1Chetveryk M.S., 1Ikol O.O., 1Malieiev Ye.V., 2Kuantay А.S.

1M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, 2Satbayev University

UDC 622.271.3:622.682

Language: English

Abstract. When miningoperationsachieve the total depth of open pits within their boundaries, a significant share of balance ore reserves remains in pillars under transport communications as well as under reloading points. Liquidation of the available transport communications should follow by the development of the new ones. Hence, mining stages of a steep-grade field and periodicity of a pillar initiation within both working open pit flank and temporarily nonworking one have been studied.
Нannivskyi open pit has been taken as an example to substantiate the expediency to extract balance reserves occurring under crushing and reloading point within ±0 m level. The substantiation of technical and technological solutions concerning the development of a protective pillar involved cuts of geological ore formation which supported the idea of availability of the preserved reserves and topicality of the selected problem.
Operation schedules to mine the pillars have been developed for general conditions; the required equipment set has been analyzed. New technological solutions have been obtained using current excavating and transportation machinery. Engineering solutions as for possibility to open the pillars and liquidate them in terms of the limited technical and technological potential have been substantiated. The technological schemes of pillar mining have been systematized depending upon the technological processes, taking place in the open pit, and the applied equipment set.
Scientific significance of the paper is the developed systematization of facilities in terms of operation schedules of pillar mining.
Practical significance is the developed operation schedules to mine and liquidate the pillars.
Technical and technological expediency to use skip hoist while reactivating temporarily nonworking open-pit walls for rock mass transportation from the pillars up to the surface has been substantiated. It has been proved that during final mining operations in an open pit, complicated by difficulties in electricity delivering to the preservation pillar, it is expedient to apply loaders in one operation schedule. Use of loaders and skip hoist to mine the preservation pillar is the optimum strategy. It has been substantiated that the proposed procedure is more advantageous to compare with the conveyor transport.
Keywords: open pit mining, preservation pillars, transport communications, reloading points, final mining, balance reserves, technological complexes.

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About the authors:

Babii Kateryna Vasylivna, Doctor of Technical Sciences (D.Sc.), Deputy Director for Scientific Affairs, Head of Department of Geomechanics of Mineral Opencast Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Chetveryk Mykhailo Serhiiovich, Doctor of Technical Sciences (D.Sc.), Professor, Senior Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .  

Ikol Oleksandr Oleksiiovych, Master of Sciences, Engineer in Department of Geomechanicks of Mineral Opencast Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Malieiev Yevhen Volodymyrovych, Master of Sciences, Junior Researcher in Department of Geomechanics of Mineral Opencast Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Kuantay Aidana Salimkereyevna, Doctoral Student, Satbayev University, Almaty, Republic of Kazakhstan, This email address is being protected from spambots. You need JavaScript enabled to view it.