نتایج جستجو برای: open pit mines

تعداد نتایج: 407524  

Journal: :Interfaces 2014
W. Brian Lambert Andrea Brickey Alexandra M. Newman Kelly Eurek

A classical problem in the mining industry for open-pit mines involves scheduling the production of notional three-dimensional production blocks, each containing a predetermined amount of ore and waste. That is, given operational resource constraints on extraction and processing, we seek a net present value-maximizing schedule of when, if ever, to extract each block in a deposit. We present a v...

Journal: :Energies 2021

The particulate pollution in the open-pit coal mines of China is particularly severe winter. aim this study to understand characteristics matter (PM) winter and provide a basis for prevention control pollution. We took problem PM concentration at bottom Haerwusu Open-pit Coal Mine (HOCM) as research object. Dust monitoring equipment two measurement points different heights were positioned conti...

Journal: :Mining 2023

The island of Cyprus is famous for its rich deposits volcanic mineralisation that yielded large quantities copper, gold, and silver. abandonment the waste material in several dump sites during exploitation severely impacted environment. A significant environmental issue acid mine drainage from hydration barren piles cover these old open pit mines. However, abandoned are still enriched precious ...

Waste rock dumping is very important in the production planning of open-pit mines. This subject is more crucial when there is a potential of acid-forming (PAF) by waste rocks. In such a type of mines, to protect the environment, the PAF materials should be encapsulated by non-harmful rocks. Therefore, block sequencing of the mined materials should be in such a way that both the environmental an...

Journal: :Journal of the Southern African Institute of Mining and Metallurgy 2015

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