نتایج جستجو برای: poly metallic open pit mine

تعداد نتایج: 538674  

Journal: :Environmental monitoring and assessment 2013
Jens Søndergaard

This study investigated dispersion and bioaccumulation of mining-related elements from an open-pit olivine mine at Seqi in Southwest Greenland (64° N) using lichens (Flavocetraria nivalis), seaweeds (Fucus vesiculosus), mussels (Mytilus edulis) and fish (Myoxocephalus scorpius). The mine operated between 2005 and 2009, and samples were taken every year within a monitoring area 0-17 km from the ...

One of the most important steps involved in mining operations is to select an appropriate extraction method for mine resources. After choosing the extraction method, it is usually impossible to replace it with another one because it may be so expensive that implementation of the entire project could be economically impossible. Choosing a mining method depends on the geological and geometrical c...

ژورنال: کواترنری ایران 2018
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In this research, a sequential Gaussian simulation method has been used to determine the permeable zones in the hard-rock aquifer of the Gohr-Zamin open pit mine. For this purpose, 4946 RQD data from eighty-seven exploratory boreholes was used and exploratory-spatial data analysis of these data was performed using the preliminary statistics, location maps, histograms and variograms. Results of ...

Journal: :Frontiers in Earth Science 2023

A dynamic optimization method was created to address the production schedule issue in an open-pit coal mine while taking into account characteristics of fuzzy structured element. The mining capacities all “geologically optimal push-back bodies” were then examined using moving cove method. One most crucial elements process scheduling is pricing. As a result, this work also presents technique for...

2014
C. Meagher R. Dimitrakopoulos D. Avis

Existing methods of pushback (phase) design are reviewed in the context of “gap” problems, a term used to describe inconsistent sizes between successive pushbacks. Such gap problems lead to suboptimal open pit mining designs in terms of maximizing net present value. Methods such as the Lerchs– Grossman algorithm, network flow techniques, the fundamental tree algorithm, and Seymour’s parameteriz...

Journal: :Agriculture 2023

Open-pit mining has caused extensive land destruction, including abandonment and reduction in agricultural land, resulting serious environmental problems. Ecological restoration mine reclamation have become important components of the sustainable development strategies Inner Mongolia, China. Therefore, rehabilitation mines is vital attracted widespread attention from Chinese government. In this...

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