drop raising in mining vcr method

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

    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...

  • Drop Raising in Mining (VCR) Method - Blogger

    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.

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

    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...

  • DROP RAISING IN UNDERGROUND MINES – Mining and Blasting

    16/06/2018  DROP RAISING IN UNDERGROUND MINES. Share this: Twitter; Facebook; Like this: Like Loading... Related. This entry was posted in Uncategorized. Bookmark the permalink. Post navigation ← Safety in Commercial Mining. Leave a Reply Cancel reply. Enter your comment here... Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required)

  • underground mining methods drop raising

    Raising methods in metal Min , DROP RAISING IN MINING (VCR) METHOD The method of drop raising is an improvement over the method of raising through longholing, described earlier , blasted in a sequence with the help of delay detonators at a time from the surface when no worker is allowed to remain underground. 【Get Price】 Techniques in Underground Mining - ILO Encyclopaedia. Methods

  • underground mining methods drop raising

    Drop Raising in Mining (VCR) Method , in mining and developed and implemented Drop Raising techniques at 80 meters intervals , UNDERGROUND MINING METHODS AT . Raise (mining) - Wikipedia. In underground mining a raise refers to a vertical or inclined , There are four excavation methods for raises: Conventional or open raise; Long-hole or drop . SECTION 10 SHRINKAGE METHODS

  • Drop raising in underground mines - LinkedIn SlideShare

    16/06/2018  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. PARTHA DAS SHARMA,

  • Different Raising Techniques in mining

    14/03/2018  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).

  • 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. A pattern of five (165mm) blast holes have been standardized for blasting the raises sequentially by ...

  • Techniques in Underground Mining

    13/03/2011  Raising is a difficult and dangerous, 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 . Manual raising. Manual raising is difficult, dangerous and physically demanding work that challenges the miner’s agility, strength and endurance. It is a job to be assigned ...

  • underground mining methods drop raising

    Raising methods in metal Min, DROP RAISING IN MINING (VCR) METHOD The method of drop raising is an improvement over the method of raising through longholing, described earlier, blasted in a sequence with the help of delay detonators at a time from the surface when no

  • drop raising in mining vcr method - restaurantarka.cz

    vrm mining method. Products List. 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 187 Get Price. Inquire Now; Khetri Copper Complex hrdnair7.blogspot

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

    01/09/2018  VCR drop-raising method is also very cost effective because relatively less number of large holes is required, and this method is also very forgiving to moderate levels of hole-deviation. Miners have been refining this technique for almost 30 years and holes size for

  • Different Raising Techniques in mining

    14/03/2018  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).

  • Techniques of inverse drop raise blasting and slot drilling

    The same drill drift can be used for the drilling of both down holes and up holes. In the case of down holes, the initial opening of the stope (drop raise) is not as much a problem as for the...

  • Techniques in Underground Mining

    Raising is a difficult and dangerous, 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 . Manual raising. Manual raising is difficult, dangerous and physically demanding work that challenges the miner’s agility, strength and endurance. It is a job to be assigned ...

  • 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.

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

    In the raising process, long-hole presplitting is first performed at the periphery of the blasting pattern, and then inner VCR multiple-deck shots with the same slice height are conducted according...

  • MECHANISED MINE DEVELOPMENT UTILISING ROCK CUTTING

    CURRENT TECHNIQUES FLAT DIPPING TO STEEP DIPPING TUNNELLING AND DEVELOPMENT 2.1 Drill and blast mechanised tunnelling and development 2.1.1 Drop raising Drop raising, also known as “longhole raise blasting” or “upsidedown raising”, is an excavation which is completely pre-drilled over its full length, then charged from the top, or bottom, and finally blasted from the bottom in practical

  • Vertical crater retreat - QueensMineDesignWiki

    Vertical crater retreat (VCR), also known as Vertical retreat mining, is an open stoping, bottom-up mining method that involves vertically drilling large-diameter holes into the orebody from the top, and then blasting horizontal slices of the orebody into an undercut.

  • drop raising in mining vcr method - restaurantarka.cz

    vrm mining method. Products List. 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 187 Get Price. Inquire Now; Khetri Copper Complex hrdnair7.blogspot

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

    17/01/2019  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 ...

  • long hole drilling method/animation/ raise development ...

    25/12/2019  in this video i've discussed about the raising method i.e. LONG HOLE raising method with interactive animation in metal mine. HOPE THIS VIDEO WILL BE HELPFUL...

  • Author: MINING MAFIA
  • Rockpasses: a guide to excavation methodology

    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 the drilling of the long holes from the cross-cut up to the raise.

  • Malanjkhand Copper Project « Copper Mining in India

    Malanjkhand Copper Project. Hindustan Copper Limited. View the web links Copper Mining Family from Malanjkhand Copper Project About N G Nair from thottakom Vaikom Kottayam 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

  • 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; Raise boring; Raises serve a number of purposes including: Transportation of ore and waste rock; Ventilation; Creating a free ...

  • Universidade Federal do Rio Grande do Sul

    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

  • Inverse box hole blasting at ... - Mining Review Africa

    29/03/2010  Johan Fourie, regional manager at AEL comments on the blasting of the inverse drop raise hole, “With the traditional box hole development method, it would take approximately 12 days to advance 15 metres before loading and blasting the hole. This process could take longer in some of the older gold mines where reef exposure is minimal.

  • List of Technical Papers – Mining and Blasting

    MINING SOFTWARE SYSTEM OPTIMIZES MINE OPERATION, SAFETY AND ENHANCES OVERALL COST-EFFECTIVENESS PRODUCTIVITY; MINING AND INDUSTRIAL DUST, AIR POLLUTION AND RELATED OCCUPATIONAL DISEASES; MINE PLANNING AND SCHEDULING – SMART PRACTICES; Blasting in High Production UG Metal Mines workings – Vertical Crater Retreat (VCR) method

  • Improved technologies in longhole blast hole drilling ...

    Dropraising also known as ‘Longhole Raise blasting’ or ‘Upside down Raising’, whereby an excavation is completely pre-drilled over the full length and then charged from the top and blasted from the bottom in practical lengths for an effective advance per blast.

  • drop raising in mining vcr method - restaurantarka.cz

    vrm mining method. Products List. 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 187 Get Price. Inquire Now; Khetri Copper Complex hrdnair7.blogspot

  • Key technologies of drilling process with raise boring method

    01/08/2015  The raise boring method is suitable for production of vertical or inclined shafts from bottom to top in underground mining operations. Generally, a small-diameter hole, called pilot hole, is first drilled, through which the cuttings fall to the lower level. The raise is a type of excavation that can be constructed by the raise boring method.

  • Description of mining methods (step by step)

    The drop raise consists in 19 holes. The long-hole drilling is completed for the stope. The drop raise is blasted in a single-shot and mucked out. The rest of the stope is blasted, 1814 to 2722 tons (2000 to 3000 short tons) at the time. The broken ore is completely mucked out after each blast. When the stope is completely blasted and mucked out, it is backfilled. The drilling of the drop ...

  • Inverse box hole blasting at ... - Mining Review Africa

    29/03/2010  Johan Fourie, regional manager at AEL comments on the blasting of the inverse drop raise hole, “With the traditional box hole development method, it would take approximately 12 days to advance 15 metres before loading and blasting the hole. This process could take longer in some of the older gold mines where reef exposure is minimal.

  • Raise bored slot raises: A modern mining technique

    Kittilä mine uses the sub- level stoping mining method. The average stope height is 25 meters but can be as high as 40 meters. The original long-hole open stoping method required 21 drill holes for opening a drop raise in each stope, using the same conventional long-hole rigs as that were used for drilling blast holes.

  • Sublevel caving - QueensMineDesignWiki

    Sublevel caving is a relatively safe mining method since the operations take place in small areas at a time and are highly mechanized. The uniformly distributed nature of generally 5mx3.7m sublevel nature of drifts aids in the safety of this mining method. To increase the stability of drifts in competent rock is controlled by smooth blasting and shotcrete, whereas less competent

  • OSRS 1-99 Mining Guide 2019 [Fast, AFK, and Money Making]

    Surprisingly, power mining (not banking ore) Iron ore is the fastest method to get your mining level up in the game. Taking advantage of three rock mining spots is key to power mining. These are located in Al-kharid, Legends Guild, Piscatoris, Verdant Valley and Mount Karuulm. Without tick manipulation, players can expect 45k - 55k Exp per hour.

  • Pay-to-play Mining training - The RuneScape Wiki

    This guide describes the most effective pay-to-play methods to train the Mining skill. Mining is a gathering skill which typically involves collecting ores from different types of ore rock; ore rocks are often found in groups at mining sites.Players can also occasionally obtain uncut gems and geodes while mining. A pickaxe is required when mining. Levelling up the Mining skill

  • Metalliferous Mines Safety Week Metalliferous Mines ...

    Metalliferous Mines Safety India, Tamil Nadu and Kerala Mines Safety Association.KERALA ZONE. Mines Safety Week Celebration 2009. 1st February to 7th February 2010. From Metalliferous Mines Safety Week (Nagpur Region).Mines Safety Week Inspection at Malanjkhand Copper, OPERATOR’S DAILY CHECK SHEET, Safety rules on Truck and Dumper Operation,

  • Mining - The RuneScape Wiki

    Mining is a gathering skill that allows players to extract ores, gems, rune essence, geodes, and other resources from rocks throughout RuneScape. Mined ores can be smelted at a furnace, turning them into bars that can be made into metal objects using the Smithing skill, Construction skill, or Crafting skill. On the World map, mines and mining sites are identified with a lump of