Rational design of ore discharge bottom in transition from open pit to underground mining in udachny mine

Sokolov, I. V.; Smirnov, A. A.; Antipin, Yu. G.; Baranovsky, K. V.

doi:10.1134/s1062739149010115

Cited by 9 publications

(4 citation statements)

References 1 publication

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“…One of the keys to analyse the stability of boundary pillar in the process of transforming the open pit into underground mining is to establish an appropriate mechanical model for mechanical analysis of the structure [7]. According to the stress characteristics of the roof in underground mining, it can be regarded as an elastic foundation beam.…”

Section: Mechanical Modelmentioning

confidence: 99%

Construction of New Multi-Function Type Artificial Boundary Pillar for Transition From Open Pit to Underground Mining

Ren¹,

Tan²,

Feng³

2019

CEJ

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In allusion to the defects of large material consumption and high construction cost of conventional artificial boundary pillar for the transition from open pit to underground mining, a new multi-function type of artificial boundary pillar scheme of reinforced concrete is proposed, which creates favourable conditions for underground mining below the pillar and stacking tailings over the pillar. We established the mechanical model of the artificial pillar, and use MIDAS-FLAC3D software to analyse the stability of the artificial pillar. The result shows that the multifunctional artificial pillar has good impervious control and flood control characteristics and bearing capacity, and can effectively separate the influence between the open pit and the underground, which realizes the effective utilization of resources and greatly improve the economic efficiency of mines. At the same time, the tailings in the open pit will support the open slope and enhance the stability of the slope. Moreover, this method effectively reduces the area of tailings reservoir and has good ecological and environmental protection value, which can provide useful reference for related mines.

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Section: Mechanical Modelmentioning

confidence: 99%

Construction of New Multi-Function Type Artificial Boundary Pillar for Transition From Open Pit to Underground Mining

Ren¹,

Tan²,

Feng³

2019

CEJ

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“…During underground mining near the surface, rock mass (often consisting of ore) termed crown pillar is left for protection by separating the ground surface from adjacent underground space. Surface crown pillars serve to prevent water inflow, or mud rushes into the underground workings, heat insulation in cold regions (Sokolov et al 2013), cave-ins, and ultimately ensure the stability of the surface infrastructure. At times their long term stability is crucial in guaranteeing stability after mine closure (Hutchinson et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Crown Pillar Behaviour in Transition from Open Pit to Underground Mining

et al. 2021

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Crown pillars provide regional and local support by isolating the ground surface from underground mine workings. Topography above the underground mine may be a relatively flat ground surface or an open-pit structure. Depending on what lies above and design of the underground mine, the crown pillar behaviour will differ. In transitioning setups (open pit to underground), large open pit collapses have taken place as a result of crown pillars located at the transition zone. Hence, this paper focuses on crown pillars between open pit and underground to better understand their behaviour. Taking the Zuuntsagaan Fluorite mine as an example where open pit will transform to underground mining, a remnant ore is to be left as a crown pillar to separate the two mining sections. Through numerical simulation in FLAC3D 7.0, stress distribution and failure mechanisms acting around the crown pillar were monitored as underground mining progresses. Effect of crown pillar geometrical parameters was evaluated, thus crown pillar thickness, span and dip. Further, the open pit geometry influence was also considered on the overall behaviour of the crown pillar. It was found out that in transition from open pit(OP) to underground(UG), slope and stope walls closing in on the crown pillar induce stresses that act as loading from the pillar sides, which in turn influence the failure process.

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“…The open-pit mining method is generally preferred in mining activities due to its extensive applicability to various kinds of exposed rock, its minimum production loss and its high production rate, especially for materials such as iron ore, bauxite and copper ore, which are exposed at the surface [3]. Moreover, the transition from open-pit to underground mining is often required during mining operations to maximize resource exploitation and increase economic efficiency, as some deposits extend from the shallow surface to a great depth [4,5], such as the Chah-Gaz iron mine in Iran [6], Udachny mine in Russia [7] and Shirengou iron mine in China [8].…”

Section: Introductionmentioning

confidence: 99%

“…exposed at the surface [3]. Moreover, the transition from open-pit to underground mining is often required during mining operations to maximize resource exploitation and increase economic efficiency, as some deposits extend from the shallow surface to a great depth [4,5], such as the Chah-Gaz iron mine in Iran [6], Udachny mine in Russia [7] and Shirengou iron mine in China [8].…”

Section: Introductionmentioning

confidence: 99%

Water inrush characteristics and hazard effects during the transition from open-pit to underground mining: a case study

Zhang

et al. 2019

R. Soc. open sci.

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During the transition from open-pit to underground mining in iron ore mines, water inrush is a prominent problem for mine safety and production. In this paper, a comprehensive method that incorporates hydrochemical analysis and numerical simulation is proposed to analyse the characteristics of water inrush during the transition from open-pit to underground mining. The proposed method revealed the migration law of groundwater and analysed the source of mine water inrush in the Yanqianshan iron mine located in Liaoning province, China. The results show that the excavated mine roadway is the primary factor affecting groundwater migration and that the source of the mine water inrush is the groundwater in the aquifer around the mine roadway. Moreover, based on the results of the study, appropriate methods for prevention and treatment of mine water inrush were proposed. This approach provides a novel idea for the assessment of water inrush hazards and will serve as a valuable reference for analogous engineering cases.

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Rational design of ore discharge bottom in transition from open pit to underground mining in udachny mine

Cited by 9 publications

References 1 publication

Construction of New Multi-Function Type Artificial Boundary Pillar for Transition From Open Pit to Underground Mining

Construction of New Multi-Function Type Artificial Boundary Pillar for Transition From Open Pit to Underground Mining

Numerical Simulation of Crown Pillar Behaviour in Transition from Open Pit to Underground Mining

Water inrush characteristics and hazard effects during the transition from open-pit to underground mining: a case study

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