NFLUENCE OF ACCESS ROAD PATTERN ON MINE ROCK VOLUME WITHIN THE ULTIMATE PIT LIMIT

Currently, ultimate pit limit designs for large and medium-size surface mines widely use mining and geological information systems providing optimized pit limits from block modeling. For the lack of the procedures for project pit limit construction based on the optimized pit limit, economic evaluations of the optimized and project pit limits may differ up to 10%. The difference can be connected with extra stripping or loss of some mineral reserves under haulage berms during access road pattern generation. This article describes the procedure and findings of the research into influence exerted by the access road pattern on the mined rock volume within the ultimate pit limit. The analytical pit model, including critical parameters of access road pattern, and the modeling results for different depth pits are presented. The results of modeling the same pit limits with the access road pattern using Micromine’s mining and geology information system are reported. The research data are given in the form of the plots of varying mined rock volume within the ultimate pit limits depending on the access road pattern at different parameters of the pit elements. It is found that the worst deviation from the optimized ultimate pit limits develops in the pits 150–200 to 400–500 m deep and reaches 30–40%.

For citation: Fedotov G. S., Pastikhin D. V. Influence of access road pattern on mine rock volume within the ultimate pit limit. MIAB. Mining Inf. Anal. Bull. 2019;(6):115-123. [In Russ]. DOI: 10.25018/0236-1493-2019-06-0-115-123.

Keywords

Mining and geology information system, optimized ultimate pit limit, project ultimate pit limit, stripping ratio, economic evaluation, open pit mine planning and design, block model, haulage berm.

Issue number: 6
Year: 2019
ISBN: 0236-1493
UDK: 622.221.2.015.3
DOI: 10.25018/0236-1493-2019-06-0-115-123
Authors: Fedotov G. S., Pastikhin D. V.

About authors: G.S. Fedotov, Graduate Student, e-mail: gfedotov@micromine.com, D.V. Pastikhin, Cand. Sci. (Eng.), Assistant Professor, National University of Science and Technology «MISiS», 119049, Moscow, Russia. Corresponding author: G.S. Fedotov, e-mail: gfedotov@micromine.com.

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