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H BLASTING IN SURFACE EXCAVATIONAppropriate blast design is important in order to lessen the production of over size Secondary blasting can be done by pop shooting (blockholing) and plaster shooting (mudcapping) Shaped charges are sometime used in secondary blasting, but this is much more expensive Cast Blasting When overburden is removed from a coal or mineral deposit it...know more

Surface Mine BlastingSURFACE MINE BLASTING Proceedings: Bureau of Mines Technology Transfer Seminar, Chicago, IL, April 15, 1987 Compiled by Staff, Bureau of Mines ABSTRACT The Bureau of Mines has sponsored a comprehensive research program to enhance the safe, effective, and efficient use of blasting technology by the mining industry...know more

Coal MiningCoal mining is a minor cost item but can have a major impact on profitability Weather and underground drainage is important Rain affects blasting Water disrupts coal ripping, blasting and mining 6...know more

CertificationsBlasting Certificates for Schedule Mines (ie other underground mines excluding underground coal mines) Blasting Certificates for Opencast Mines; A candidate must meet the required number of practical mine shifts and other application requirements before an ,...know more

Drilling and blastingThe most commonly used explosives in mining today are ANFO based blends due to lower cost than dynamite Before the advent of tunnel boring machines (TBMs), drilling and blasting was the only economical way of excavating long tunnels through hard rock, where digging is not possible...know more

History of Explosives and BlastingHistory of Explosives and Blasting In the US and Canada alone, blasters use more than 6 billion pounds of explosives and 75 million detonators per year Coal mining accounts for two-thirds of consumed explosives of which more than 80% of it is ANFO...know more

Coal miningCoal mining - Coal mining - Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many ,...know more

Blackwater coal blastsJun 22, 2008· Coal Blasting at Blackwater in 2008...know more

Blasting costsEven though drill and blast costs in the ore have increased, the overall net benefit to Mt Rawdon, including mining and processing costs, is expected to be more than $5 million While the Vistis system is a key input to the mine to mill program the benefits Mt Rawdon achieved are equally attributable to the operational changes it made...know more

OPEN CAST MINE PLANNINGOPENCAST MINE PLANNING, DEPLOYMENT OF HEMM FOR OPTIMUM UTILISATION, TOTAL TECHNICAL PARAMETERS OF HEMM INCLUDING LIMITATIONS, & HAUL ROAD & ITS MAINTENANCE PD RATHI Sr Mining Engineer OPEN CAST MINE PLANNING Factors that influence planning: 1) Demand of coal a Countrywide demand b Regional demand 2) Distribution of coal ,...know more

Case Study Cast Blastingblasting for improved cast and cost Cost analysis showed that designs with larger diameter blast holes lead to reduced mining cost and faster coal uncovery rate The overall result of the first cast shot was excellent and Peabody Wilkie Creek Mine is continuing to see benefits of this project Acknowledgements...know more

Coal Mine BlastingJan 30, 2009· Blasting routine in Open Cast Min don't miss @ 120mins and @ 5 mins This kind of blasts happen almost every day...know more