نتایج جستجو برای: open pit mine

تعداد نتایج: 423030  

2013
Esther Santofimia Elena González-Toril Enrique López-Pamo María Gomariz Ricardo Amils Ángeles Aguilera

The Iberian Pyrite Belt (IPB) hosts one of the world's largest accumulations of acidic mine wastes and pit lakes. The mineralogical and textural characteristics of the IPB ores have favored the oxidation and dissolution of metallic sulfides, mainly pyrite, and the subsequent formation of acidic mining drainages. This work reports the physical properties, hydrogeochemical characteristics, and mi...

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...

2010
Chen Yanli Xu Xiaoling Liu Xiaoyan

For the demand of lower localization costs, less communications costs and higher accuracy of objects tracking under mine pit, weighted centroid localization algorithm based on RSSI is introduced to localize the node. This algorithm shows relatively high accuracy by simulation and is suitable for the localization of mine personnel.

2007
Esther Santofimia Enrique López Pamo Javier Sánchez España Martin Schultze Kurt Friese

Since its closure in 1995 and the subsequent accident happened in 1998, the Aznalcóllar mine pit has been used as a disposal site for diverse metal-rich materials removed during the rehabilitation of polluted areas along the Guadiamar river and around the former ore processing facilities. At present, the mine pit is partly flooded and contains a highly acidic (pH 2.7) pit lake with ~6 Hm of met...

2007
O. K. H. Steffen

Mine planning is a typical engineering design function which integrate the disciplines of geology, metallurgy, geotechnics, mining and economics. The numerous uncertainties associated with geological understanding, the exposure of people to potential hazards in the work place and the need to provide a specific dollar outcome, requires a proper assessment of the risk. This paper identifies the s...

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