2012 Americas School of Mines

Mining Methods 26. PwC Notes: Strip Ratio Mining Methods 27 Mistakes are often made when computing the strip ratio. It's all in the words and you have to watch the flow of material and how it is classified. For example, according to Freeport McMoran's 2007 10K filing, the concentrator is capable of processing 75,000 metric tons per day of primary sulfide ore and the mining fleet is capable ...

Underground Mining Methods – EXCELLENCE IN MINING ...

 · Underground mining is the process of extracting minerals and ores that are loed too far underground to be mined efficiently using surface mining methods. The primary objective of underground mining is to extract ore safely and economically while minimizing handling of waste rock. Typically, underground mine has less environmental impact.

Chapter 9 DECISION TREES

chine learning, pattern recognition, and Data Mining have dealt with the issue of growing a decision tree from available data. This paper presents an updated survey of current methods for constructing decision tree classifiers in a topdown manner. The chapter suggests a unified algorithmic framework for presenting these algorithms and describes various splitting criteria and pruning ...

Present over video and create inspiring visuals online | Prezi

Create interactive visuals that appear right next to you on screen as you present with Prezi tools. Record to share later or go live with your favorite video conferencing tools.

Green Mining

Insitu leaching mining (see the mining background page) has been introduced as the required mining method for those new mines that can physically implement this technology. Saponifiion, a step of the refining process that leaves the wastewater highly toxic, can be improved through a newly discovered method that eliminates the need for ammonia. All mines will transfer to this process to ...

Lecture 10: Regression Trees

36350: Data Mining October 11, 2006 Reading: Textbook, sections and The next three lectures are going to be about a particular kind of nonlinear predictive model, namely prediction trees. These have two varieties, regression trees, which we'll start with today, and classifiion trees, the subject of the next lecture. The third lecture of this sequence will introduce ways of ...

5 Ways to Make Mining More Sustainable

Traditional mining techniques can have a severe impact on the environment, and some popular methods — like open pit and underground mining — present some of the most significant environmental risks. By instead using new, alternative lowimpact mining techniques — like insitu leaching — mining companies can reduce their environmental impact. With many of these techniques, companies can ...

stop the quarrystope and pillar mining

(2)StopAndPillar Mining It is the method in which openings are driven horizontally in regular and random patterns to form pillars for ground support. It is one of the large mining method accounting for about 50% of noncoal production. Get Price; Description of mining methods (step by step) nvppgf. Secondary Mining Method RoomandPillar ...

Subsidence from Underground Mining: Environmental Analysis ...

mining methods, depth of extraction, thickness of deposit, and topography, as well as the in situ properties of the rock mass above the deposit. The impacts of subsidence are potentially severe in terms of damage to surface utility lines and struc­ tures, changes in surfacewater and groundwater conditions, and effects on vegetation and animals. Although subsidence cannot be eliminated, it ...

P21Channel

Underground Mining Method: Sublevel Caving

Mining terms explained: A to Z | Anglo American

Mining explained. Bulk ore sorting and coarse particle recovery – leading the way in mineral processing innovation. Mining explained. Mining Terms Explained: A to Z. Mining explained. Digging deeper: Mining methods explained. Mining explained. A Virtual Tour of a Modern Mine. 18 August 2017.

Digging deeper: Mining methods explained | Anglo American

Large scale mechanised mining methods we use include: longwall mining, where a long wall of coal is mined in a single slice, usually by a large machine. sublevelcaving, where levels of the ore are blasted by explosives; and ; block caving, where large areas of the ore body are blasted and then extracted with the assistance of gravity. We use these three different types of underground mining ...

Stope Pillar Mining | PDF | Mining | Nature

pillar method of mining. *Very thick ore body can be mined by Stope Pillar. method. By cutting horizontal slice either from top. to bottom or bottom to top (upper hand or under. hand). *Competent rock mass is very desirable as this is an. open method. *Stope normally stay open during the life of panel.

Machine Guarding

Presentation from People First that covers Machine Guarding. 63 slides. Guarding Conveyor Belts. This guide provides compliance information to help the metal and nonmetal mining industry meet current requirements of the Mine Safety and Health Administration's (MSHA's) guarding standards addressing conveyor belts. 58 slides.

1,085 Sublevel PPTs View free download |

View Sublevel PPTs online, safely and virusfree! Many are downloadable. Learn new and interesting things. Get ideas for your own presentations. Share yours for free! Toggle navigation. Help; Preferences; Sign up ; Log in; Advanced. Sublevel PowerPoint PPT Presentations. All Time. Show: Recommended. Sort by: Energy level Sublevel of orbitals/sublevel ... Mendeleev s periodic table. Slide 38 ...

Hard Rock Miner's Handbook

engineering, construction, and operation of mining projects worldwide—conceived of and wrote the first edition of the Handbook, published in June 2000, to assist miners and engineers in the difficult world of hard rock mining. It was his gift to an industry that provided him with employment, challenges, and fascination. The Handbook is a notforprofit publiion intended to help the mining ...

Haul Road Design Guidelines

Stopping distance is the minimum distance needed by a vehicle to stop, when travelling at a design speed, to avoid an oncoming hazard. The distance takes into account driver reaction time, the retarding action time delay for any vehicle and the time taken for the vehicle to come a complete stop. In each situation stopping distances may vary according to the vehicle concerned, the grade and the ...

Safety Training PowerPoint Presentations

This howto video will walk you through everything you need to know to get started using the translation features of PowerPoint. For more information on using Translator with Microsoft PowerPoint, visit here . Instantly translate and preserve the layout of any document format into any language.

Cancelling / stopping an executing method (selector ...

Anim1 = OK > Anim2 = OK > Anim3 > Button enabled > Clicked > Set all imageviews to alpha = All works as well, but i have create an another method to 'clean' these views, then start again. Basically, it cancels all selectors, then removesfromSuperView all imageviews that have been created. And, call anim1 again.

Data Mining Classifiion: Decision Trees

Data Mining Classifiion: Decision Trees TNM033: Introduction to Data Mining 1 ... – But, there are other methods Nearestneighbor classifiers Naïve Bayes Supportvector machines Neural networks TNM033: Introduction to Data Mining ‹#› Example of a Decision Tree Tid Refund Marital Status Taxable Income Cheat 1 Yes Single 125K No 2 No Married 100K No 3 No Single 70K No 4 Yes Married ...

What is the difference between sublevel stopping and ...

Answer: For sublevel stoping the ore body and walls should be strong enough to support open stoping. In this method, the ore is excavated in open stopes, retreating from one end of the stope toward the other. The orebody is developed first by a series of sublevel drifts above the main haulage le...

Optimization calculation of stope structure parameters ...

In the mine empty field mining method, the ore recovery rate increases when the exposed area of the stope is large; thus, this method provides economic benefits to the mining enterprise; however, the safety hazard of the mine also increases [1]. Therefore, designers must consider the safety factor according to the specific surrounding rock condition of a mine and design an optimal exposed ...

DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor

Sublevel | Minería | Minerales

Scribd is the world's largest social reading and publishing site.