Journal Article10.1080/17480930.2019.1701968
A mixed integer linear programming framework for optimising the extraction strategy of open pit – underground mining options and transitions
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TL;DR: A combined sequential and simultaneous open pit and underground (OPUG) mining with crown pillar as the optimal extraction option generating NPV that is 11% and 13% better than independent OP or UG mining, respectively.
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Abstract: The decision to exploit a mineral deposit that can be extracted by open pit and/or underground mining involves consideration of the following options: (a) independent open pit extraction; (b) indep...
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Citations
Timing of transition from open-pit to underground mining: A simultaneous optimisation model for open-pit and underground mine production schedules
TL;DR: In this paper , a mixed-integer programming model is proposed to obtain the optimal transition point and the transition period from open-pit to underground mining, maximizing the project net present value considering crown pillar placement and development cost.
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A Review of Models and Algorithms for Surface-Underground Mining Options and Transitions Optimization: Some Lessons Learnt and the Way Forward
Bright Oppong Afum,Eugene Ben-Awuah +1 more
- 10 May 2021
TL;DR: In this study, extensive literature review and a gap analysis matrix are used to identify the limitations and opportunities for further research in surface-underground mining options and transitions optimization for comprehensive resource development planning.
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Optimization of transition from open-pit to underground mining considering environmental costs
Naser Badakhshan,Kourosh Shahriar,Sajjad Afraei,Ezzeddin Bakhtavar +3 more
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Determination of an Optimum Interface between Open-Pit and Underground Mining Activities in Mazinu Coal Mine of Tabas Power Plant
TL;DR: The results obtained indicate that the optimum interface of the OP and UG mining activities correspond to the ultimate OP limit with a maximum depth of 200 m from the ground surface.
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Optimizing the Transition from Open Pit to Underground Mining Based on Economic Uncertainties
Alireza Salehi,Sajjad Afraei,Kourosh Shahriar +2 more
- 01 Jan 2024
TL;DR: The paper explores the optimal timing for transitioning from open pit to underground mining based on economic uncertainties. It analyzes various factors influencing the decision, including commodity prices, production costs, and environmental regulations. The goal is to maximize long-term profitability while minimizing risks associated with the transition.
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References
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Rock Mechanics: For Underground Mining
B. H. G. Brady,Edwin T. Brown +1 more
- 16 May 1985
TL;DR: In this article, the authors discuss the effects of pre-mining state of stress and infinitesimal strain on rock mass structure and characterisation, as well as mine stability, mine seismicity and rockbursts.
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First Report of Alternaria dianthicola Causing Leaf Blight on Withania somnifera from India.
TL;DR: The pathogen was identified as Alternaria dianthicola and further confirmed by the Agharkar Research Institute, Pune, India and was consistently reisolated from inoculated plants.
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Electrophoretic Analysis of Ruminal Degradability of Corn Proteins
TL;DR: Quantitative measurement of ruminally degradable subfractions and estimation of their degradation rates by electrophoretic and densitometric scanning are useful in understanding ruminal degradability of corn proteins.
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Optimizing the open pit-to-underground mining transition
TL;DR: This work presents a methodology to maximize the NPV for an entire metal deposit by determining the spatial expanse and production quantities of both the open pit and underground mines while adhering to operational production and processing constraints.
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