Drop Raising In Mining Vcr Method

Drop Raising in Mining (VCR) Method - copper mining …

Drop Raising in Mining (VCR) Method D rop Raising in Mining (VCR) Methods of Stopes ( Extraction of Ore). Hindustan Copper Limited has addressed the complex ‘raising’ operation in mining and developed and implemented Drop Raising techniques at 80 meters intervals which improved safety and led to faster and higher productivity.

Drop Raising in Mining (VCR) Method - Blogger

Drop Raising in Mining (VCR) Methods of Stopes ( Extraction of Ore). Hindustan Copper Limited has addressed the complex ‘raising’ operation in mining and developed and implemented Drop Raising techniques at 80 meters intervals which improved safety and led to faster and higher productivity.

drop raising in mining vcr method

Drop raising in mining vcr method Mining engineer malanjkhand copper project drop raising in mining vcr method emerging trends in mining and allied industries research and development Find out more Full text of American libraries canadian libraries universal library community texts project gutenberg biodiversity heritage library children wow mining mines drop Felslate Farming Best Places fo ...

Drop Raising in Mining - read more - copper mining India ...

N G Nair, Mining Engineer from Copper Mines in India‎ > ‎Drop Raising in Mining (VCR) Method‎ > ‎ Drop Raising in Mining - read more VCR concept: The term crater in blasting terminology is applied for creation of a surface cavity in a rock mass as result of detonating an explosive charge into it.

DROP RAISING IN UNDERGROUND MINES – Mining and …

16-6-2018· drop raising in underground mines Safety in Commercial Mining NEW BURN CUT BLAST DESIGN IN DRIVES ENHANCES DRILLING & BLASTING EFFICIENCY WITH ECONOMY – A …

vrm mining method - educationcare.in

Drop Raising in Mining (VCR) Method - copper mining India (1980 ... Drop Raising in Mining (VCR) Methods of Stopes ( Extraction of Ore). ... Vertical crater retreat (VCR), also known as vertical retreat mining (VRM), reduces the... More details » Get Price

Drop raising in underground mines - LinkedIn SlideShare

16-6-2018· DROP RAISING - INTRODUCTION Special method of charging of Explosives and blasting is done in stages from bottom level for excavation in slices. The charging and blasting of the holes is based on Vertical Crater Retreat (VCR) method. The raise is driven either vertically or with steeply inclined dip. Mucking of blasted material done from lower level.

Different Raising Techniques in mining - LinkedIn SlideShare

14-3-2018· Different Raising Techniques in mining 1. DIFFERENT RAISING TECHNIQUES 2. Definition vertical or steeply-inclined opening that connects different levels in mine. ladder way access to stopes, ore pass or airway in mine’s ventilation system. Raising methods vary from simple manual drill and blast to mechanical rock excavation with raise boring machines (RBMs).

Study on the long-hole raising technique using one blast ...

VCR method has been an established mining method being practiced in various mines all over the world. 8 An offshoot of this mining method is the VCR drop-raising technique that employs the same spherical crater charge technology as VCR method.9, 10 This technique has vastly improved raise blasting safety because top loading no longer requires workers to be underneath the freshly blasted …

Techniques in Underground Mining - ILO Encyclopaedia

Methods for Underground Mining The choice of mining method is influenced by the shape and size of the ore deposit, the value of the contained minerals, the composition, stability and strength of the rock mass and the demands for production output and safe working conditions (which sometimes are …

Drop Raising In Mining Vcr Metho - borduuratelier-petra.nl

Drop Raising in Mining (VCR) Method - copper mining India . Drop Raising in Mining (VCR) Method D rop Raising in Mining (VCR) Methods of Stopes ( Extraction of Ore) Hindustan Copper Limited has addressed the complex ‘raising’ operation in mining and developed and implemented Drop Raising techniques at 80 meters intervals which improved safety and led to faster and higher productivity

Study on the long-hole raising technique using one blast ...

VCR method has been an established mining method being practiced in various mines all over the world. 8 An offshoot of this mining method is the VCR drop-raising technique that employs the same spherical crater charge technology as VCR method.9, 10 This technique has vastly improved raise blasting safety because top loading no longer requires workers to be underneath the freshly blasted …

(PDF) Study on the raising technique using one blast based ...

VCR drop-raising is actually. an o ff shoot of vertical crater retreat (VCR) mining method based on. Livingston's cratering theory. 8 ...

Techniques in Underground Mining - ILO Encyclopaedia

Methods for Underground Mining The choice of mining method is influenced by the shape and size of the ore deposit, the value of the contained minerals, the composition, stability and strength of the rock mass and the demands for production output and safe working conditions (which sometimes are …

Underground mining (hard rock) - Wikipedia

Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds or rubies. Soft rock mining refers to excavation of softer minerals such as salt, coal ...

Vertical crater retreat - QueensMineDesignWiki

History. The VCR mining method was developed by INCO and CIL Inc., and is based on Mr. C.W. Livingston’s crater blasting theories. It was first used in 1974, at the Levack mine located in the Sudbury Basin’s North Range, and it provided productivity benefits almost immediately.In fact, mining productivity, measured in pounds of nickel and copper produced per manshift, has improved by ...

Techniques of inverse drop raise blasting and slot drilling

A scheme of multiple deck blasting based on vertical crater retreat (VCR) drop-raising method was designed for an abandoned cavity with 30-m cover. The lower 12-m cover was first blasted to ...

JORA RAISE CLIMBER METHOD | Method of Raise Drivage ...

17-1-2019· This video is 3rd video of Metal Mining video Series. In this video we will discuss Jora raise climber method of raising. There are following methods of Raise Drivage- 1.Jora Raise method 2 ...

Raise (mining) - Wikipedia

In underground mining, a raise refers to a vertical or inclined excavation that leads from one level, or drift, to another. A raise may also extend to surface. There are four excavation methods for raises: Conventional or open raise; Long-hole or drop raise; Alimak

Alimak Mining Mass Blast - YouTube

27-3-2015· Sublevel Stoping Mining Method - Duration: 3:02. Black Diamond Drilling Services Australia PTY LTD 47,514 views. ... History of Cornish Mining - The Raise Episode 2 Blasting - Duration: 16:33.

Drop Raising In Mining Vcr Metho - borduuratelier-petra.nl

Drop Raising in Mining (VCR) Method - copper mining India . Drop Raising in Mining (VCR) Method D rop Raising in Mining (VCR) Methods of Stopes ( Extraction of Ore) Hindustan Copper Limited has addressed the complex ‘raising’ operation in mining and developed and implemented Drop Raising techniques at 80 meters intervals which improved safety and led to faster and higher productivity

JORA RAISE CLIMBER METHOD | Method of Raise Drivage ...

17-1-2019· This video is 3rd video of Metal Mining video Series. In this video we will discuss Jora raise climber method of raising. There are following methods of Raise Drivage- 1.Jora Raise method 2 ...

Raise (mining) - Wikipedia

In underground mining, a raise refers to a vertical or inclined excavation that leads from one level, or drift, to another. A raise may also extend to surface. There are four excavation methods for raises: Conventional or open raise; Long-hole or drop raise; Alimak

(PDF) Underground mining Methods - ResearchGate

2) Room (Bor d)-and-Pillar mining (or con tinuous mining) method It is the most common supported pillar method, designed and used primarily for mining flat-lying

Drop Raising Method | Mining | Drilling | Prueba gratuita ...

Drop Raising Method - Free download as PDF File (.pdf), Text File (.txt) or view presentation slides online. Drop raising method

Alimak Mining Mass Blast - YouTube

27-3-2015· Sublevel Stoping Mining Method - Duration: 3:02. Black Diamond Drilling Services Australia PTY LTD 47,514 views. ... History of Cornish Mining - The Raise Episode 2 Blasting - Duration: 16:33.

Rockpasses: a guide to excavation methodology

˜ Invert drop raising is totally applicable due to set-up speed and speed of drilling, enabling this length to be excavated at competitive cost and with minimum disruption to raising process. Medium Length Passes (15–45 m) ˜ Conventional drop raising and invert drop raising are the most effective methods, the invert process being

Universidade Federal do Rio Grande do Sul

characteristics of the major mining methods. 1.3.2 Room-and-Pillar Mining Room-and-pillar mining is designed for flat-bedded deposits of limited thickness, such as copper shale, coal, salt and potash, limestone, and dolomite. This method is used to recover resources in open stopes. The method leaves pillars to support the

Lecture 4: Underground Mining - LinkedIn SlideShare

Choice of mining method Underground Mining Methods Soft rock Mining Methods Blast mining Shortwall mining Coal Skimming (or Sink and Float) method Hard rock Mining Methods Stoping 1) Room and pillar 2) Bench and Fill (B & F) stoping 3) Cut and Fill (C & F) stoping 4) Stull stoping 5) Square-set stoping 6) Shrinkage stoping 7) Long-hole Open stoping 8) Vertical Crater Retreat (VCR) …

LONG HOLE DRILLING - YouTube

7-3-2016· To drill blast holes for ore pass development from the cross cut and from the bottom up. It is also used for drilling drain holes and cable holes.