Vertical Crater Retreat Mining Method

2014-02-07· This article is about the orebody requirements and developmental steps involved in Vertical Crater Retreat planning and mining. Vertical crater retreat (VCR), also known as Vertical ... "Vertical Crater Retreat Mining Method ...

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 ...

Underground mining method; Shrinkage stoping, Ascending method of mining, Advantages and Disadvantages, Vertical Crater Retreat stoping, Introduction, Applica…

2018-05-26· CASE STUDY ON VERTICAL. CRATER RETREAT MINING BY: SUJAN DALBEHERA DEVGAN SINGH ABHAYA MISHRA 1 VCR MINING Vertical crater retreat (VCR) mining is a method originally developed by …

VCR MINING. 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 ...

2009-12-07· Underground Mining Methods and Applications Production ... Modifying the mining method and introducing new, ... Deposits with large vertical heights are mined in slices. Mining starts at the top below the hanging wall.

2018-05-29· Vertical Crater Retreat. Blasthole mining is a general term applied to mining methods that employ long hole drilling for the production of ore. In most Blasthole methods the ore is blasted into a vertical opening. The ...

2017-08-28· ORIGINAL PAPER The Blasting Test and Blasting Vibration Monitoring of Vertical Crater Retreat Mining Method in the Luohe Iron Mine Zhenbin Rao . Sijing Cai Received: 10 September 2015/Accepted: 29 April 2016/Published online ...

2018-05-28· There are two principal phases of underground mining: development mining and production mining. ... Vertical retreat mining (VRM) also known as Vertical crater retreat (VCR) is a method …

2016-06-07· A true vertical crater retreat (VCR) method ... Research Study on Pillar Design for Vertical Crater Retreat ... The approach taken in each case was a combination of mine measurements of the study stope response to mining, ...

The Edumine online course Design and Application of Sublevel Stoping Methods. Toggle navigation. ... This course refers to the generic mining method of sublevel ... and vertical crater retreat …

2018-04-09· Vertical Crater Retreat is compared to other open stoping methods. Various geotechnical factors have been considered including the effects of stress concentration, jointing, dynamic stresses...

2015-11-09· Cut and fill mining method is a favored choice for steeply dipping and sometimes irregular orebodies and preferred by mines that require the capability of se...

Vertical Crater Retreat: an Important New Mining … Document Summary for "Vertical Crater Retreat: an Important New Mining Method" » Learn More. vertical rotary grinder. Vertical Rotary Grinder - e-tech Machinery Inc. E-tech ...

2011-08-04· Mining and Blasting ... Blasting in High Production UG Metal Mines workings – Vertical Crater Retreat (VCR) method. ... underground metal mines, vertical crater retreat (VCR). Bookmark the permalink. Post navigation

2009-08-26· mining depths of 1200 m and vertical stresses at the range of 20 to 35 MPa. Having tested at low production rates from a total pre-developed orebody the mining methods ... mining method and the deployment of equipment to ensure

Drop Raising in Mining (VCR) Method - copper mining … Vertical crater retreat (VCR), also known as vertical retreat mining (VRM), reduces the cost of mining wide, steeply orebodies. The stope has a similar shape, but instead ...

2007-03-22· A method of underground mining operation. A method of underground mining operation. Skip navigation Sign in. Search. ... Sub Level Caving Burak Misket. Loading... Unsubscribe from Burak Misket? Cancel Unsubscribe.

2009-08-26· Mining method selection is a critical point and a strategic issue in the mining engineering process. ... included in the above list are the stope and pillar mining, vertical crater retreat mining (VCR), strip mining and novel

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 ...

Vertical Crater Retreat (VCR ... the spherical charge is positioned at a distance underneath and the detonation creates a crater shape ... -higher risk for damaging surrounding rock than SLOS method-dilution.

Outline of Topic 5: Shrinkage stoping Ascending method of mining Advantages and Disadvantages Vertical Crater Retreat stoping Introduction Application Developmental sequence of stopes Production How Cratering ...

Posts about vertical crater retreat (VCR) written by PARTHA DAS SHARMA

2009-09-08· Notes on Vertical Crater Retreat Method ... mining rate Case Studies Falconbridge Nickel Mines - used for rib pillar recovery (before VCR was employed, cut and fill, and sub-level stoping

2017-06-08· 6 Petrović D.; Milić V.; Svrkota I.; Stojadinović S.; Denić M. Figure 4 - Bighole stoping method (Atlas Copco, 2007) 3.3. Vertical crater retreat mining method - VCR Vertical Crater Retreat method applies to orebodies with ...

2017-12-31· (VCR) Vertical Crater Retreat, en español cráteres de retroceso vertical. Patentado en Canadá por la Minera Inco. Mina Levack (1974). ... Canadian Institute of Mining, Metallurgy and Petroleum. (01 de Septiembre de 1979).

2015-04-01· seismicity occurs close to mining activity, mostly due to sudden mining induced stresses. A small fraction of the recorded seismicity, ... However, in some of the data sets, the vertical stress was found to be erroneous-. ...

Get this from a library! Vertical crater retreat : a new mining method. [J W Williams]

2016-04-21· Discuss the geology, geometry and rock strength issues applicable to the vertical crater retreat mining method. (3 marks) Underground Mining Methods and Design 09-Mmp-A2 May 2015 Page 3 of 13 Question 1.3 (7 marks) ...

2011-09-20· also determine the most appropriate mining method. The highest-volume commodity produced by the U.S. minerals industry is crushed stone. An esti- mated 1.2 billion t (1.3 billion st) of crushed stone was