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

This method is called vertical crater retreat (VCR) or vertical retreat mining (VRM) method. 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 ...

Raise boring slots: a modern mining technique

Raise boring slots: a modern mining technique Raise boring has commonly been employed at different stages of mine construction for decades, most frequently as a means of drilling shafts, raises and ore chutes – but seldom (despite the endless possibilities) as a production method…until now, writes Jarko Salo, the managing director of

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.

Indian Copper Complex - nair23.blogspot.com

Home Mining Consultant Mechanized Open Cast Mine and Under Ground Mines. Indian Copper Complex - Old History Indian Copper Complex Smelter Photo Stoping methods - Indian Copper Complex Swarnrekha River. Ghatsila, Jharkhand, INDIA, PIN: 832303 ASHTAMI AT VAIKOM MAHADEVA TEMPLE, Kumarakom Sanctuary is located on the east coast of the Vembanad …

Mine Manager Profile « Copper Mining Engineer

Copper Mining in India and Mining Methods Open Cast and Under Ground Mining by N G Nair Mining conference reports, Picture, blogs and more – For the benefit of Mining Engineering students. Drop Raising in Mining (VCR) Method Emerging Trends in mining and …

underground mining methods drop raising

Raising methods in metal Min, DROP RAISING IN MINING (VCR) METHOD, Blasting Techniques in High Production underground metal Min. Live Chat; Ore and waste passes - QueensMineDesignWiki. Ore and waste passes should be designed to intersect levels and sub levels in order to, conventional raising and drop raising, Underground Mining Methods .

Techniques of inverse drop raise blasting and slot drilling

In addition, it was reported that using an inverse drop- raising technique, a raise was blasted with a single blast up to 15 m from the bottom up at Elandsrand mine. 13 The greatest advance in one ...

a level (compare raise). 1.3 MINING METHODS 1.3.1 Introduction Once an ore body has been probed and outlined and sufficient information has been collected to warrant further analysis, the important process of selecting the most appropriate method or methods of mining can …

Training Centre Malanjkhand Copper Project

Mines Vocational training at Malanjkhand Malanjkhand Copper Project. Mines Safety Training, Basic Training, Refresher Training, Special Training under Mines Vocational training rules. ... Drop Raising in Mining (VCR) Method. Drop Raising in Mining - read more. First Class Mines Manager Certificate. Haridwar, Uttarakhand. Independence Day ...

MECHANISED MINE DEVELOPMENT UTILISING ROCK …

Drop raising is commonly used world-wide in the development of rock and ventilation passes over a length of generally up to 60m in the vertical mode and around 15m in an almost flat mode (Refer graph 1 and 2 – Inclination and length matrix). Drop raising offers a safe method …

Drop Raising in Mining (VCR) Method - copper mining India ...

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.

underground mining methods drop raising - siculocks.eu

drop raising in mining vcr method. Ore passes are used to drop mined ores Alimak is one of the most common ore pass raising and drop Underground Mining Methods The Design of Ore Pass, Chat Now; Blasting company breaks new ground with inverse drop raising.

Khetri Copper Complex - hrdnair7.blogspot.com

Copper Mining Family from Malanjkhand Copper Project Drop Raising in Mining (VCR) Method Hindustan Copper Limited to use bio-leaching tech for ore processing Indian Copper Complex Information Technology In Mining Industry Khetri Copper Complex Kolar Gold Fields Malanjkhand Copper Mine Malanjkhand Photo Mine Plan and Mine Design

underground mining methods drop raising - bovenindewolken.be

Info-Nugget. Mining is carried out by opencast as well as by underground method The Malanjkhand copper mine and the, drop raising techniques are used In drop raising technique, holes can be drilled to 100 m in length and 165 mm in diameter,.

Alimak Mining Mass Blast - YouTube

Mar 27, 2015· World Dangerous Idiots Bulldozer Heavy Equipment Operator Skill - Fastest Working Bulldozer Driving - Duration: 14:06. Machines News 2,035,820 views

Vertical crater retreat mining in the Sudbury Basin ...

VCR has gradually supplanted other mining methods until today about three- quarters of the Sudbury output is obtained using VCR. VERTICAL CRATER RETREAT MINING IN THE SUDBURY BASIN Vertical crater retreat mining History The vertical crater retreat mining method is based on C.W. Livingston's crater blasting theories and was developed by Inco and ...

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

Techniques in Underground Mining - ILO Encyclopaedia

Techniques in Underground Mining ... but necessary job. Raising methods vary from simple manual drill and blast to mechanical rock excavation with raise boring machines (RBMs) (see figure 3). Figure 3. Raising methods. ... The development for VCR mining is similar to that for sublevel stoping except for requiring both over-cut and under-cut ...

Khetrinagar- My School Days at KV NO 1

Copper Mining in India and Mining Methods Open Cast and Under Ground Mining by N G Nair . Posted by SARLA NAIR at ... My shcool days at khetrinagar. ... Drop Raising in Mining (VCR) Method 7 years ago Uploads from SARLA NAIR MALANJKHAND.

Malanjkhand Copper Project - Blogger

Drop Raising in Mining (VCR) Method - Drop Raising in Mining (VCR) Method. Under ground mechanized mining methods. Under ground mechanized mining methods. Drop Raising in Mining (VCR) Methods of Stopes ( Extraction of Ore).

Reagetswe Mining Services - Bonolo Trust

Reagetswe Mining Services. ... It means if we can use mechanized method we will even do more than 600m^2 per panel. In development we are doing average 30 to 36 meter per crew.We also perform well in sweeping, drop raising and other areas of mining. Our last major accident was in 2005 and it was due to an individual ignorance.

Under Ground Mechanized Mining Methods

Under ground mechanized mining methods. 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.

Description of mining methods (step by step) - nvp-pgf.org

Description of mining methods (step by step) Apollo Gold Corporation - Diamond Hill mine (U.S.A) ... The drop raise consists in 19 holes. ... The room-and-pillar mining method is predominantly used since it allows the adjustment for sudden changes in direction of the vein. However, the management is endeavouring to introduce the long-hole ...

Rockpasses: a guide to excavation methodology - SAIMM

Unless the drop raise site is off the raise line, raising stops while this process is under way. Invert drop raising using down-the-hole hammer technology This method is very similar to conventional drop raising, but the availability of drill rigs using down-the-hole (DTH) hammers, both compressed air and water driven, has led to

Sub Level Caving - YouTube

Mar 22, 2007· A method of underground mining operation. Treasure hunting, more crystals and fluorite, Colorado 2018 - what do gold dirt rocks look like?

drop raising in mining vcr method - palmfruitoil.co.za

drop raising in mining vcr method. Get quote information. Would like to know the latest product quotes. Please tell us the details of the details, we will give you a most favorable offer information. Modern Day Placer Mining in Yukon Energy, Mines and Resources .

Mining - Underground mining | Britannica.com

Mining - Underground mining: When any ore body lies a considerable distance below the surface, the amount of waste that has to be removed in order to uncover the ore through surface mining becomes prohibitive, and underground techniques must be considered. Counting against underground mining are the costs, which, for each ton of material mined, are much higher underground than on the surface.

Metalliferous Mines India | Metalliferous Mines Safety India

Upgradation of skills is an important component of HRD. Training imparted in Institutions alone is not sufficient for acquisition of skills and needs to be supplemented by training in the actual work place. Mines Vocational Training Centre. N G Nair mining consultant India on Indian mining legislation.