-Vertical crater retreat mining method (, 2007)

Download scientific diagram | -Vertical crater retreat mining method (, 2007) from publication: Possibility of application of backfill methods with cementing fill in ore body Borska ...

vertical crater retreat mining method

Vertical Crater Retreat RitchieWiki . A vertical crater retreat VCR also referred to as vertical retreat mining involves drilling large diameter holes into the orebody vertically from the top of the mine as opposed to the conventional blasthole stope method of …

Retreat Mining, Room and pillar mining, Underground …

2021715 · Retreat mining is an unsafe process, nevertheless, guided by severe safety regulations. When pulling support pillars numerous methods are used to shore up mine ceilings and avert roof falls. Mobile roof supports relieve pressure on adjacent pillars during this precisely conducted mining phase. In few cases wooden cribs or hydraulic jacks are ...

Vertical Retreat Mining (VRM) or Vertical Crater Retreat …

2021226 · Background. VRM is a contraction of ''Vertical Retreat Mining'', however it is also known as ''Vertical Crater Retreat'' or ''VCR'' or sometimes simply called ''Inverted Crater …

The Blasting Test and Blasting Vibration Monitoring of …

2017828 · ishing became difficult more and more, the mining scheme of Luohe iron mine was changed from caving method to filling method. In order to ensure the safety of the residence and the underground tunnel cavern within the mobile belt of the underground mining, the Luohe iron mine did the blasting test on the vertical crater retreat mining method ...

Vertical Crater Retreat: an Important New Mining Method

INTRODUCTION The introduction of 165-mm (61/z-in.) holes to underground mining operations has made possible the application of Canadian Industries Ltd''s (CIL) vertical crater retreat …

Vertical Crater Retreat Mining Method

3.3. Vertical crater retreat mining method - VCR Vertical Crater Retreat method applies to orebodies with steep dip and competent rock in both ore and host rock. Part of the blasted ore will remain in the stope over the production cycle, serving as temporary support. This mechanized method can be regarded as a considerably safer form of ...

Vertical crater retreat mining in the Sudbury Basin

199191 · Stopes are mined using the VCR method and ore handled by a fully integrated system including the CL-1000 Osciloader, an Eagle-3640 low profile crusher, and extensible …

vertical crater retreat mining method

2021-2-26 VRM is a contraction of "Vertical Retreat Mining", however it has other names as well - as sophisticated as "Vertical Crater Retreat" or "VCR" or simply called "Inverted Crater Blasting". In 1983, it was called "an achievement of the last decade and is practiced in mines in Australia, Europe, Central America, and the U. S.

vertical crater retreat mining method

The variant is known as the vertical crater retreat (VCR) mining method. It was invented by mining engineers working in the nickel mines in Canada. The company, INCO or International Nickel Company as it was known, obtained a patent on the method, and until the patent expired near the end of the 20th century, INCO had exclusive use of this new

Types of Underground Mining Method …

2017316 · Shrinkage stoping refers to any overhand method in which the stope is kept full of broken ore until it is completed. The miners stand on top of the broken ore and work at the back. As broken ore takes up more space than ore …

8.3.2: Shrinkage Stoping | ABC 123: Testing Site …

The variant is known as the vertical crater retreat (VCR) mining method. It was invented by mining engineers working in the nickel mines in Canada. The company, INCO or International Nickel Company as it was known, obtained a …

Vertical Crater Retreat Mining Method

Vertical crater retreat : a new mining method . Get this from a library! Vertical crater retreat : a new mining method. [J W Williams] sublevel caving mining method - ZCRUSHER. sublevel caving mining method ... Wikipedia Vertical crater retreat is the predominant mining method while sublevel open-stopping and sublevel caving methods are also ...

Vertical Crater Retreat Mining Method

202279 · Vertical crater retreat is the predominant mining method while sublevel open-stopping and sublevel caving methods are also used. Other metallurgical facilities, under a management contract by an affiliate of the Anglo American Group, include the Nkana smelter (not owned by Mopani), acid plant (not owned by Mopani) and copper refinery (not owned by Mopani).

vertical crater retreat mining method

longitudinal retreat mining method samatour fr. Vertical Crater Retreat Stoping as Applied at the Homestake 28 Jul 2012 Therefore the feasibility of applying the VCR stoping method at the Homestake Mine was explored Vertical Crater Retreat stoping is a recent innovation in large scale underground mining based on CW ivingston scrater . Read More

Types of Mining Methods | Sell Side Handbook

2018311 · Sublevel stoping (and its variations) is one of the most popular mining method and accounts for approximately 75% of the methods used in mines across Canada. There are several variations of long-hole sublevel …

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202078 ·  (Vertical Crater Retreat mining method) VCR... VCR (), ... I …

vertical crater retreat mining method

The Vertical Crater Retreat (VCR) mining method was used to mine two rib pillars at New Broken Hill Consolidated Limited (NEHC) mine at Broken Hill. Experience gained in a trial VCR pillar …

Vertical Crater Retreat Mining Method Vcr

20211023 · Vertical crater retreat (VCR) mining is a method originally developed by the Canadian. mining company INCO. Today, VCR is an established mining method used by mines all over the world that. have competent, steeply dipping ore and host rock. VCR is based on the crater blasting technique in which powerful explosive charges are.

Vertical crater retreat mining in the Sudbury Basin

:. Faced with rising costs and lower metal prices, several Ontario base metal sulphide mines have changed their method of mining to vertical crater retreat mining. This is a bulk mining method that utilizes large diameter holes and mines successive cuts remotely by blasting and cratering the bottom of the drill holes.

vertical crater retreat mining method

Mindola mine is currently the deepest mine in the Zambian copper belt Stoping is currently active to 1330 m below surface with long range plans indicating future production from 1590 m level The orebody is tabular and dips between 55o to vertical The thickness varies from 8 to 14 m The vertical crater retreat method of mining was first introduced at Mindola mine in the late,...

Vertical crater retreat

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. A system of primary and secon…

Vertical Crater Retreat

Vertcial crater retreat is a comparatively new method of blasthole mining in which only large diamter ITH holes are used to blast down horizontal slices of ore into an opening below the …

Vertical crater retreat mining in the Sudbury Basin

199191 · The safety aspect of vertical crater retreat mining has been of concern, and was the focus of a provincial inquiry. The benefits in improved safety are demonstrated through an …

vertical crater retreat mining method vcr

The Blasting Test and Blasting Vibration Monitoring of, In order to ensure the safety of the residence and the underground tunnel cavern within the mobile belt of the underground mining, the Luohe iron mine did the blasting test on the vertical crater retreat mining method and blasting vibration monitoring The blasting experiments use common emulsified oil explosives and non …

Vertical crater retreat mining in the Sudbury Basin

199191 · Faced with rising costs and lower metal prices, several Ontario base metal sulphide mines have changed their method of mining to vertical crater retreat mining. This is a bulk mining method that utilizes large diameter holes and mines successive cuts remotely by blasting and cratering the bottom of the drill holes. The ore body is mined from ...

vrm vertical crater retreat

VRM/ VCR These acronyms stand for vertical retreat mining, which also refers to vertical crater retreat (VCR). This mining method divides the mines into vertical zones having a depth of 50 meters using a bottom-up mining technique. After ore blasting occurs, retrieval will take place at the bottom of the developed section.

Vertical Crater Retreat: an Important New Mining Method

PILLAR RECOVERY Levack Mine Inco Metals Co., Ontario Div., provided the first opportunity for the method in pillar recovery. The Levack mine''s high grade ore pillar No. 4800 on the 975-m (3200-ft) level was used for the production¬scale experiment (Figs. 1 to 3).

vertical crater retreat mining method

2017-4-5 · Vertical crater retreat (VCR) mining is a method originally developed by the Canadian. mining company INCO. Today, VCR is an established mining method used by mines all over the world that. have competent, steeply dipping ore and host rock. VCR is based on the crater blasting technique in which powerful explosive charges are.

The Blasting Test and Blasting Vibration Monitoring of …

201654 · The blasting test on the vertical crater retreat mining method and the blasting vibration were analyzed. It is estimated if the vibration damage possibly the surface buildings and related facilities of mine. Introduction. The initial design scheme of the Luohe iron mine was sub-level caving mining. In the collapse area, the requisition of lands ...

Vertical Crater Retreat (VCR) con relleno by …

20171231 · Diseño. (VCR) Vertical Crater Retreat, en español cráteres de retroceso vertical. Patentado en Canadá por la Minera Inco. Mina Levack (1974). *Se fundamenta en la teoría de cráteres de C. Livingston. *Arranque en …

vertical crater retreat mining method

Study on the long hole raising technique using one blast PDF Underground mining Methods ResearchGate. In Canada in mining company INCO developed a mining method based on Livingston s cratering theory This method is called vertical crater retreat VCR or vertical retreat mining VRM method2 Room Bor d and Pillar mining or con tinuous mining method It is the …

The Blasting Test and Blasting Vibration Monitoring of …

201681 · The Blasting Test and Blasting Vibration Monitoring of Vertical Crater Retreat Mining Method in the Luohe Iron Mine. August 2016; Geotechnical and Geological Engineering 34(4)

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