economical evaluation of a working slope flatter than the ultimate slope for open pit mining
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economical evaluation of a working slope flatter than the ultimate slope for open pit mining

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Published by Laurentian University, School of Engineering in Sudbury, Ont .
Written in English


Book details:

Edition Notes

Statementby Kok-Meng Tai.
The Physical Object
Paginationviii, 65 l. :
Number of Pages65
ID Numbers
Open LibraryOL19990032M

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What the Slope Means. The concept of slope is very useful in economics, because it measures the relationship between two variables. A positive slope means that two variables are positively related—that is, when x increases, so does y, and when x decreases, y also decreases. Graphically, a positive slope means that as a line on the line graph moves from left to right, the line rises. What the Slope Means. The concept of slope is very useful in economics, because it measures the relationship between two variables. A positive slope means that two variables are positively related—that is, when x increases, so does y, and when x decreases, y decreases also. Graphically, a positive slope means that as a line on the line graph moves from left to right, the line rises.   The overall pit slope used for design must be flatter to allow for the road sys tem in the ultimate pit. Fig 3 and Fig 4 show the need to design the pit with a lesser sl ope to allow for roads. Keywords: Rock excavation, Safety analysis, Slope stability, Surface mining Introduction The geotechnical study and slope design was conducted of an open pit copper mine ( m long, m wide) situated in Rajasthan, India. The ore body is 40 m wide and m long. The ultimate pit depth is m. The ore body is striking NNW-SSE.

  The coordination between end-slope underground mining and surface coal mining is mainly composed of underground mining time, working face moving and shifting time, new roadway excavating time and surface mining-and-dumping advancing speed, as shown in Fig. order to minimize the mutual interaction between UMM and surface mining, the following relations should be . Analyses of a deep wall in an open pit mine in the Peruvian Andes are used to compare limit equilibrium methods (SLIDE) with distinct element methods (UDEC) when the stability is controlled by rock mass strength. The pit wall has an overall slope angle of 37º and a . Slope stability can be generally described as the inherent structural integrity of a slope to resist failure. Failure can occur as slides, cracks and slope movement. Erosion control is intended to provide surface slope stability to protect the face of the slope and to strengthen portions of the slope below the surface by. Write the equation of the graph in slope intercept form. y = 4/3x - 6. Write the equation of the graph in slope intercept form. Rise over Run. Slope. Rise. Vertical Change. Run. Horizontal Change. rise over run, stairs, up and over. Used to help find Slope. Negative. Type of Slope. Positive.

Design of open pit slope angles is becoming more and more important as the mining depths of open pits continuously increase. Small changes in the overall pit slope angle have large consequences on the overall economy of the mining operation. A case in particular is the Aitik open pit mine in northern Sweden, which currently faces the design of.   Basic Concept ) Open pit Mining method ) Bench ) Open Pit Bench Terminology ) Bench height ) Cutoff grade ) Open Pit Stability: i) Pit slope ii) Pit wall stability iii) Rock strength iv) Pit Depth v) Pit diameter vi) Water Damage vii) Strip Ratio (SR) ) Open-pit mining sequence ) Various open-pit and orebody. This article recalls the principles of slope design in open pit mines, and presents techniques and tools available to address the successive stages of slope design. Their practical implementation is then illustrated by two case studies of open pit mines. 2. PRINCIPES DE DIMENSIONNEMENT DES TALUS DE MINE A CIEL OUVERT. A slope is an inclined boundary surface between air and the body of an earthwork such as highways, cut or fill, railway cut or fill, earth dams, levees and river training work. The slope stability analysis is crucial in engineering practice to ensure the stability of structures and prevent loss of human life and money. [ ].