Formula optimization of dust coagulation agent for application in open-pit iron ore mine blasting: Formula optimization of dust coagulation agent for application in open-pit iron ore mine blasting

2016 ◽  
pp. 581-585
Author(s):  
E Ma ◽  
Q Wu ◽  
X Wu ◽  
Q Lang ◽  
Z Cui
Keyword(s):  
Iron Ore ◽  
Open Pit ◽  
Iron Ore Mine

scholarly journals Diagnosis about iron ore mine haul roads in the Quadrilátero Ferrífero: Itabira Complex case

2014 ◽  
Vol 67 (4) ◽  
pp. 421-429 ◽  
Author(s):  
Maíra dos Santos Reis ◽  
Waldyr Lopes de Oliveira Filho ◽  
Ely Oliveira ◽  
Gladsney Pena
Keyword(s):  
Iron Ore ◽  
Open Pit ◽  
Complex Case ◽  
Open Pit Mining ◽  
Mining Activities ◽  
Mining Company ◽  
Iron Ore Mine ◽  
Quadrilátero Ferrífero ◽  
Haul Road ◽  
Design Construction

Although mine haul roads only provide support for mining activities, their role can be quite significant in any effort to optimize transportation with trucks in open pit mining. In 2009, an inventory about the design, construction and maintenance conditions of these structures in mines in the Quadrilátero Ferrífero was undertaken through a partnership between a large mining company and UFOP. Although the conditions of the roads could be considered broadly satisfactory, several points with potential for improvement were observed. This partnership was recently resumed on enlarged bases for an upgrade, but with a quantitative approach and in a representative mine. The report of this mine haul road diagnosis with a feedback on how we can do more and better for mine haul roads are presented in this work.

Modified Stability Charts for Rock Slopes Based on the Hoek-Brown Failure Criterion / Zmodyfikowane Diagramy Stabilności Skalistych Zboczy Otrzymane W Oparciu O Warunek Wytrzymałości Hoeka-Browna

2013 ◽  
Vol 58 (3) ◽  
pp. 747-766
Author(s):  
Mahdi Nekouei ◽  
Kaveh Ahangari
Keyword(s):  
Failure Criterion ◽  
Iron Ore ◽  
Limit Equilibrium ◽  
Slope Angle ◽  
Limit Equilibrium Method ◽  
Open Pit ◽  
Rock Slopes ◽  
Iron Ore Mine ◽  
Equilibrium Method ◽  
Error Percentage

Abstract Only an article rendered by Lia et al. in 2008 has represented charts based on Hoek-Brown criterion for rock slopes, however, these charts are not precise and efficient. Because of this problem, a modification is suggested for the mentioned charts in this study. The new charts are calculated according to four methods. Among the methods, one relates to finite element method using Phase2 software. The other three methods are Janbu, Bishop and Fellenius that belong to limit equilibrium method by using Slide software. For each slope angle, the method having high correlation coefficient is selected as the best one. Then, final charts are rendered according to the selected method and its specific equations. Among forty equations, twenty-five ones or 62.5% relate to numerical method and Phase2 software, six ones or 15% belong to Fellenius limit equilibrium, six ones or 15% relate to Bishop limit equilibrium, and three ones or 7.5% belong to Janbu limit equilibrium. In order to validate new charts, slope stability analysis is carried out for several sections of Chadormalu iron ore open pit mine, Iran. The error percentage of new charts in limit equilibrium method using Slide software and in Bishop method for slopes of Chadormalu iron ore mine are rendered and compared. The charts on a basis of Hoek-Brown failure criterion for rock slopes show less than ±4% error. This indicates that these charts are appropriate tools and their safety factor is optimal for rock slopes.

Use of SAR interferometry for monitoring illegal mining activities: A case study at Xishimen Iron Ore Mine

2011 ◽  
Vol 21 (6) ◽  
pp. 781-786 ◽  
Author(s):  
Maowei Ji ◽  
Xiaojing Li ◽  
Shunchuan Wu ◽  
Yongtao Gao ◽  
Linlin Ge
Keyword(s):  
Iron Ore ◽  
Sar Interferometry ◽  
Mining Activities ◽  
Iron Ore Mine ◽  
Illegal Mining
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