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
Drop Raising in Mining (VCR) Method. 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
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 MINING (VCR) METHOD The method of drop raising is an improvement over the method of raising through longholing, described earlier. In India at the Copper Mines of Khetri Copper Complex. This is a method of making a raise connection
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
4/8/2011· Posts about vertical crater retreat (VCR) written by PARTHA DAS SHARMA Mining and Blasting Weblog of Partha Das Sharma For Discussing Various Aspects of Mining
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Mine Plan and Mine Design. Sub Level Open Stopes in Mining with Ring Drilling and Blasting. VCR method of Extraction of Ore. Mining Technology used at Khetri Group of Mines in Rajasthan India. Malanjkhand Technical association
Posts about vertical crater retreat (VCR) written by PARTHA DAS SHARMA Mining and Blasting Weblog of Partha Das Sharma For Discussing Various Aspects of Mining, Explosives and Blasting .
method proved to be slow and labour intensive, resulting in a backlog of box holes. We changed to a mechanised method, combining inverse box holes with drop raising,” says Elandsrand mine acting
The raising design parameters with 250-mm hole diameter, including charge weight and height for each slice, slice height, hole spacing and delay interval, were derived. A scheme of multiple deck blasting based on vertical crater retreat (VCR) drop-raising method
makes this method inappropriate for shorter holes. ˜ Conventional drop raising: this method is applicable, but the extra cost and the interruption of the raise process counts against it. ˜ Invert drop raising is totally applicable due to set-up speed and speed of
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
25/12/2019· in this video i've discussed about the raising method i.e. open raising in metal mine. HOPE THIS VIDEO WILL BE HELPFUL TO YOU!!! two compartment :- https://y...
Drop raising offers a safe method of excavation at relatively economic cost. Major advantages of this method include not exposing people to the dangers of entering a pass from underneath, and, the ability to blast short passes of up to 10m in one blast.
type of excavation method and section length. Typically, sections excavated by drop raising or conventional raising are shorter than sections driven by Alimak or raise bored, Table II. Atlas Copco (1997) reported the same general trend in other raise applications.
Drop Raising in Mining (VCR) Method Drop Raising in Mining (VCR) Method. Under ground mechanized mining methods. Drop Raising in Mining (VCR) Methods of Stopes ( Extraction of Ore). Hindust 7 years ago Khetri Copper Complex and Malanjkhand
CBI sources said the official was travelling northwards from Thiruvananthapuram, Kerala State and collecting money. The mines safety director arrived on Sunday and was staying here when the sleuths caught him. Bribes were collected for relaxing provisions for the safety of the labourers in mines coming under the South Zone of the directorate.
Old Memories, my life, N G Nair India, Mining Engineer India, Mines Manager, N Gopakumaran Nair (my life and Old memories) When children are born, they are like blank slates on which their parents' help to script the beginnings of the stories of their lives.
4/8/2011· Software for Mining Technical Papers Recent Posts DROP RAISING IN UNDERGROUND MINES Safety in Commercial Mining NEW BURN CUT BLAST DESIGN IN DRIVES ENHANCES DRILLING & BLASTING EFFICIENCY WITH ECONOMY A CASE STUDY
12/12/2013· Raise drilling is used to create large drill holes -- up to 7.6 meters in diameter. The holes, or tunnels, are used to connect mine shafts, power plant tunnels or channels for rainwater and
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. Category People & Blogs Song Pulsator No. 3
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