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 Intege...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.展开更多
ZTE Corporation, China’s largest supplier of telecommunications e-quipment, is to strengthen its position as a market leader in NorthAfrica and the Middle East by opening a manufacturing facility inAlgeria.In an agre...ZTE Corporation, China’s largest supplier of telecommunications e-quipment, is to strengthen its position as a market leader in NorthAfrica and the Middle East by opening a manufacturing facility inAlgeria.In an agreement with well-established local company INATEL,ZTE will look to manufacture wireless fixed teiminal and other e-quipment in Algeria. The signing ceremony was held at the Tele-comp exhibition in Algeria and was witnessed by the country’stelecommunications minister, Mr. Amar Tou, and Government offi-展开更多
China will open part of its civil projects in national research program, including hi-tech development programs and major basic research programs to overseas scientists, said a senior official with the Ministry of Sci...China will open part of its civil projects in national research program, including hi-tech development programs and major basic research programs to overseas scientists, said a senior official with the Ministry of Science and Technology (MOST). Facing the globalization trend in terms of economy and S&T development, China will take a展开更多
基金funding support provided by the Laurentian University Research Fund for the compilation of this report
文摘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.
文摘ZTE Corporation, China’s largest supplier of telecommunications e-quipment, is to strengthen its position as a market leader in NorthAfrica and the Middle East by opening a manufacturing facility inAlgeria.In an agreement with well-established local company INATEL,ZTE will look to manufacture wireless fixed teiminal and other e-quipment in Algeria. The signing ceremony was held at the Tele-comp exhibition in Algeria and was witnessed by the country’stelecommunications minister, Mr. Amar Tou, and Government offi-
文摘China will open part of its civil projects in national research program, including hi-tech development programs and major basic research programs to overseas scientists, said a senior official with the Ministry of Science and Technology (MOST). Facing the globalization trend in terms of economy and S&T development, China will take a
