Transition from Surface to Underground Mining - Understanding Complex Rock Mass Interactions Through the Integration of Mapping, Monitoring and Numerical Modelling Data

Eberhardt, Erik; Stead, D.; Elmo, Davide; Dunbar, W. Scott; Scoble, Malcolm J.; As, Andre van; Moss, Allan; Vyazmensky, Alexander; Tollenaar, Roderick; O’Connor, Chris; Eissa, H; Sturzenegger, Matthieu

doi:10.36487/acg_repo/708_19

Cited by 6 publications

(2 citation statements)

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“…Mineralization in the multi-phase porphyry body has formed a cylindrical ore body consisting of disseminated mineral veins [5] [6] [7] [8]. The mineralized zone in a dome shape is over 2300 m long, 600 -800 m wide, and 1000 m high.…”

Section: Geological Characteristics Of the Ore Bodymentioning

confidence: 99%

Recent Technological Innovation for the New Generation of CRIST Sensors—A Practical Approach in China’s Largest Underground Nonferrous Mine

Guan,

Li,

Tan

et al. 2023

OJAppS

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Located in Shangri-La county, Yunnan Province, China's biggest underground nonferrous mine Pulang Copper Mine is under construction. To date, the defined copper reserves at the Pulang Copper Mine are 4.8 million tonnes of copper and an average grade of 0.34%. The mineralized zone is 2300 m long, 600 -800 m wide, and 1000 m high in a dome shape. The first-stage mining and processing capacity is 12.5 million tonnes of ore per year. By geotechnical investigation, ore haulage is adopted via a drift and ore pass development system. From mineralogical analysis, a majority of the Pulang copper ore body is classified as a type III rock, which is generally considered to be suitable for blockcaving methods. As an update to the traditional mine-to-mill approach, a caveto-mill integrated production concept is then introduced. This is essentially the integration of underground mine production scheduling and monitoring with surface mineral processing management based on fragment size and geometallurgical ore characteristics. Several unique challenges experienced during the project design and construction, as well as a number of features aimed at mitigating these problems, are also discussed in this paper.

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Section: Geological Characteristics Of the Ore Bodymentioning

confidence: 99%

Recent Technological Innovation for the New Generation of CRIST Sensors—A Practical Approach in China’s Largest Underground Nonferrous Mine

Guan,

Li,

Tan

et al. 2023

OJAppS

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“…However, the transition from open-pit to underground mining presents challenges in terms of geotechnical aspects, infrastructure definition, and meeting project deadlines and production targets [6]. Eberhardt [7] conducted an implementation that addressed the challenges and risks associated with transitioning from surface to underground mass mining. It employs remote sensing, numerical modeling, and monitoring technologies to study rock engineering interactions and surface deformations caused by cave propagation.…”

Section: Introductionmentioning

confidence: 99%

A Stope Mining Design with Consideration of Hanging Wall When Transitioning from Open Pit Mining to Underground Mining for Sepon Gold Mine Deposit, Laos

Phaisopha,

Shimada,

Sasaoka

et al. 2023

Mining

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This study investigates the transition from surface to underground mining at the Sepon Gold mine. The stability of surface slopes is assessed prior to commencing underground operations. Stope mining is adopted based on ore body characteristics and geological features. Finite element numerical analysis, employing the Generalized Hoek–Brown criterion, evaluates slope stability for surface slopes and opening stopes. The pit design comprises a 70° slope angle, 20 m height, and 10–15 m safety berm, meeting stability requirements with a factor of safety of 2.46. Underground mining design includes a 62° ore body dip, a 50 m thick crown pillar to prevent surface subsidence, and 5 m wide, 5 m high stopes. Sill pillars are left for support after each level of excavation. Rock bolts are employed in specific stope areas where necessary, with continuous monitoring for surface deformation. This study analyzes the influence of stope sizes on the pit wall and pit bottom stability, identifying slope failures near the hanging wall close to the pit bottom during underground mining. A slight increase in the displacement zone is observed on the upper crest of the top footwall. Overall, the findings demonstrate successful stability in the transition from surface to underground mining at the Sepon Gold mine.

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Numerical Analysis of Block Caving-Induced Instability in Large Open Pit Slopes: A Finite Element/Discrete Element Approach

et al. 2009

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Transition from Surface to Underground Mining - Understanding Complex Rock Mass Interactions Through the Integration of Mapping, Monitoring and Numerical Modelling Data

Cited by 6 publications

References 0 publications

Recent Technological Innovation for the New Generation of CRIST Sensors—A Practical Approach in China’s Largest Underground Nonferrous Mine

Recent Technological Innovation for the New Generation of CRIST Sensors—A Practical Approach in China’s Largest Underground Nonferrous Mine

A Stope Mining Design with Consideration of Hanging Wall When Transitioning from Open Pit Mining to Underground Mining for Sepon Gold Mine Deposit, Laos

Numerical Analysis of Block Caving-Induced Instability in Large Open Pit Slopes: A Finite Element/Discrete Element Approach

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