The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Yashar Pourrahimian - One of the best experts on this subject based on the ideXlab platform.
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Strategic Mining options optimization: Open pit Mining, Underground Mining or both
International journal of mining science and technology, 2016Co-Authors: Eugene Ben-awuah, Tarrant Elkington, Otto Richter, Yashar PourrahimianAbstract:Abstract Near-surface deposits that extend to considerable depths are often amenable to both open pit Mining and/or Underground Mining. This paper investigates the strategy of Mining options for an orebody using a Mixed Integer Linear Programming (MILP) optimization framework. The MILP formulation maximizes the Net Present Value (NPV) of the reserve when extracted with (i) open pit Mining, (ii) Underground Mining, and (iii) concurrent open pit and Underground Mining. Comparatively, implementing open pit Mining generates a higher NPV than Underground Mining. However considering the investment required for these Mining options, Underground Mining generates a better return on investment than open pit Mining. Also, in the concurrent open pit and Underground Mining scenario, the optimizer prefers extracting blocks using open pit Mining. Although the Underground mine could access ore sooner, the Mining cost differential for open pit Mining is more than compensated for by the discounting benefits associated with earlier Underground Mining.
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Strategic Mining options optimization: Open pit Mining, Underground Mining or both
Elsevier, 2016Co-Authors: Eugene Ben-awuah, Tarrant Elkington, Otto Richter, Yashar PourrahimianAbstract:Near-surface deposits that extend to considerable depths are often amenable to both open pit Mining and/or Underground Mining. This paper investigates the strategy of Mining options for an orebody using a Mixed Integer Linear Programming (MILP) optimization framework. The MILP formulation maximizes the Net Present Value (NPV) of the reserve when extracted with (i) open pit Mining, (ii) Underground Mining, and (iii) concurrent open pit and Underground Mining. Comparatively, implementing open pit Mining generates a higher NPV than Underground Mining. However considering the investment required for these Mining options, Underground Mining generates a better return on investment than open pit Mining. Also, in the concurrent open pit and Underground Mining scenario, the optimizer prefers extracting blocks using open pit Mining. Although the Underground mine could access ore sooner, the Mining cost differential for open pit Mining is more than compensated for by the discounting benefits associated with earlier Underground Mining. Keywords: Mining options optimization, Open pit, Underground, Concurrent, Open stope, Mixed Integer Linear Programming (MILP
Gaojian Miao - One of the best experts on this subject based on the ideXlab platform.
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Rock Mass Deformation Characteristics in High-Steep Slopes Influenced by Open-Pit to Underground Mining
Geotechnical and Geological Engineering, 2016Co-Authors: Chuanbo Zhou, Nan Jiang, Dingbang Zhang, Zhihua Zhang, Gaojian MiaoAbstract:In Daye Iron Mine, the open-pit Mining has ended and the Underground Mining started in 2003. The present pit slopes are as high as 430 m and the slope angle is up to 43°. During the process of open-pit to Underground Mining, the high-steep pit slopes would be affected by both open-pit Mining and Underground Mining, and its deformation characteristics would become more complex. So in this paper, the trinity method of numerical simulation, model experiment and field test was adopted to analyze the displacement and stress fields systematically. The results show that: (1) Prominent rebound deformation occurs near the slope foot, which is induced by the unloading in open-pit Mining. When it is backfilled to 0 m level, the rebound deformation decreases, which indicate that backfilling mass can restrict the deformation and improve the slope stability; (2) Subsidence dominates the slope deformation in open-pit to Underground Mining and it increases with an increasing elevation of monitoring point; the maximum horizontal displacement occurs in the lower part of the slopes, because the backfilled part is squeezed by both the north slope and the south slope, and it has a lower elastic modulus than the previous orebody; (3) The stress and its variability near the slope foot are much larger than other places, indicating that the slope foot is most affected by stress redistribution and stress concentration may occur here; the stress at other stress monitoring points changes little, indicating that the influence of open-pit to Underground Mining is local; (4) The effect of Underground Mining on the deformation of the faults is not prominent; (5) Mining operations in near-ground part affect more on the variation of deformation and stress of pit slopes than that in deeper part.
Shi Guo Sun - One of the best experts on this subject based on the ideXlab platform.
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The Study of Rock Burst Induced by Underground Mining Excavation
DEStech Transactions on Environment Energy and Earth Sciences, 2017Co-Authors: Shi Guo Sun, Zhi-qi Gong, Shuai-ying WeiAbstract:The Underground Mining extends to deep, resulting in that Underground Mining geological environment and Mining conditions become increasingly complex, thus induced by various forms of disaster. Among them, rock burst disaster is a serious consequence, and the number has an increasing trend. It has become one of the most important hidden dangers in the excavation of Underground engineering. This paper mainly introduces the research status, existing problems and development trend of the monitoring and early warning technology of the rock burst.
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Analysis of the Relative Position of the Slope and Underground Mining Area and its Influence Properties
Advanced Materials Research, 2013Co-Authors: Shi Guo Sun, Hong Yang, Jia Wang, Bao Lin Zhang, Ming Zhu WangAbstract:The stability state of slope rock mass is relating to each other’s relative location during the transformation from open-pit to Underground Mining, it’s the most disadvantageous influence on the slope stability when the Underground Mining area is located in the toe of slope, and it’s the best influence as in the slope extracellular region. Slope stability factor changes with the geometric dimensions of Underground Mining increased, but not in direct proportion. Under the condition of constant geometric dimensions of Mining area, the influence on slope stability is changing with the Mining depth increased. Thus indicating that the influence on slope stability by Underground Mining has its spatial property, and to determine the specific influence value requires a combination of many factors, such as the relationship of relative spatial position, the geometric dimensions of Mining area, engineering geological conditions and so on.
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Analysis of Influence Characteristics on Slope Stability of Underground Mining in Slope Outer Zone
Advanced Materials Research, 2012Co-Authors: Shi Guo Sun, Hong Yang, Zhan Bin Zhang, Tian Wen Zhang, Chun Sheng WangAbstract:Under the action of surface-Underground unite Mining, Slope stability is related to Underground Mining location and Mining space dimension, This paper studies the Underground Mining of slope outer region on slope stability influence characteristic; With the increase of Mining width stability coefficient increases, when Mining width reach a certain value stability coefficient tends to constant; With the increase of Mining depth stability coefficient increases, when Mining depth reaching a certain value stability coefficient began to decrease; this show that the Underground Mining has a direct effect on slope stability, its size needs a combination of their relative spatial position relation and Mining geometric size to determine.
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Space Properties of Effects of Slope Stability by Underground Mining
Advanced Materials Research, 2012Co-Authors: Shi Guo Sun, Pei Xin DongAbstract:At present, technology for open pit combined Underground Mining is one problem about mine. It mainly involves some problems, such as how to design deep resources exploitation, how to evaluation slope stability and so on. Combining the Underground Mining effect with their characteristics and function attributes influenced by the slope deformation, this paper considers the both composite superimposed law, and derives the calculation method of the slope stability under comprehensive function. Accordingly, explore the influence law of slope stability, induced by Underground Mining area and the relative position and the space and geometry size changes of slope body. And the final purpose is to provide the scientific basis for design and safety assessment of deep resource extraction.
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The Study on Key Issues of Slope Instability during Turning Open-Pit into Underground Mining
Advanced Materials Research, 2012Co-Authors: Shi Guo Sun, Hong Yang, Bao Lin Zhang, Ai Wei Miao, Ming Zhu WangAbstract:During turning open-pit into Underground Mining, the state of slope stability is related to the relative space positional relationship between open-pit Mining and Underground Mining. The toe area of slope is the most unfavorable area to slope stability and the outer region of slope is the most favorable area, while the central area of the slope has the most complicated effect on slope stability so that the mechanism of its influence can be understood only by the means of calculation. The slope stability coefficient decreases with the augment of Underground Mining geometric dimension. But it remains constant when the Underground Mining area is fully extracted. With the increase of Mining depth, its range of influence on slope stability increases, which results in the decrease of slope stability coefficient. However, the slope stability coefficient tends to unchanged when the Mining depth increases to some certain value.
Eugene Ben-awuah - One of the best experts on this subject based on the ideXlab platform.
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Strategic Mining options optimization: Open pit Mining, Underground Mining or both
International journal of mining science and technology, 2016Co-Authors: Eugene Ben-awuah, Tarrant Elkington, Otto Richter, Yashar PourrahimianAbstract:Abstract Near-surface deposits that extend to considerable depths are often amenable to both open pit Mining and/or Underground Mining. This paper investigates the strategy of Mining options for an orebody using a Mixed Integer Linear Programming (MILP) optimization framework. The MILP formulation maximizes the Net Present Value (NPV) of the reserve when extracted with (i) open pit Mining, (ii) Underground Mining, and (iii) concurrent open pit and Underground Mining. Comparatively, implementing open pit Mining generates a higher NPV than Underground Mining. However considering the investment required for these Mining options, Underground Mining generates a better return on investment than open pit Mining. Also, in the concurrent open pit and Underground Mining scenario, the optimizer prefers extracting blocks using open pit Mining. Although the Underground mine could access ore sooner, the Mining cost differential for open pit Mining is more than compensated for by the discounting benefits associated with earlier Underground Mining.
Otto Richter - One of the best experts on this subject based on the ideXlab platform.
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Strategic Mining options optimization: Open pit Mining, Underground Mining or both
International journal of mining science and technology, 2016Co-Authors: Eugene Ben-awuah, Tarrant Elkington, Otto Richter, Yashar PourrahimianAbstract:Abstract Near-surface deposits that extend to considerable depths are often amenable to both open pit Mining and/or Underground Mining. This paper investigates the strategy of Mining options for an orebody using a Mixed Integer Linear Programming (MILP) optimization framework. The MILP formulation maximizes the Net Present Value (NPV) of the reserve when extracted with (i) open pit Mining, (ii) Underground Mining, and (iii) concurrent open pit and Underground Mining. Comparatively, implementing open pit Mining generates a higher NPV than Underground Mining. However considering the investment required for these Mining options, Underground Mining generates a better return on investment than open pit Mining. Also, in the concurrent open pit and Underground Mining scenario, the optimizer prefers extracting blocks using open pit Mining. Although the Underground mine could access ore sooner, the Mining cost differential for open pit Mining is more than compensated for by the discounting benefits associated with earlier Underground Mining.
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Strategic Mining options optimization: Open pit Mining, Underground Mining or both
Elsevier, 2016Co-Authors: Eugene Ben-awuah, Tarrant Elkington, Otto Richter, Yashar PourrahimianAbstract:Near-surface deposits that extend to considerable depths are often amenable to both open pit Mining and/or Underground Mining. This paper investigates the strategy of Mining options for an orebody using a Mixed Integer Linear Programming (MILP) optimization framework. The MILP formulation maximizes the Net Present Value (NPV) of the reserve when extracted with (i) open pit Mining, (ii) Underground Mining, and (iii) concurrent open pit and Underground Mining. Comparatively, implementing open pit Mining generates a higher NPV than Underground Mining. However considering the investment required for these Mining options, Underground Mining generates a better return on investment than open pit Mining. Also, in the concurrent open pit and Underground Mining scenario, the optimizer prefers extracting blocks using open pit Mining. Although the Underground mine could access ore sooner, the Mining cost differential for open pit Mining is more than compensated for by the discounting benefits associated with earlier Underground Mining. Keywords: Mining options optimization, Open pit, Underground, Concurrent, Open stope, Mixed Integer Linear Programming (MILP
