Jul 11, 2013 Saving energy at the source. A system for fuel saving. Home to nine of the top 10 producing coal mines in the country, Wyoming produced 400 million tonnes of the fossil fuel in 2012 — a round-the-clock rate of nearly 13 tonnes every second. The coal-rich Powder River Basin stretching from north-eastern Wyoming to south-eastern Montana ...
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Get PriceJul 12, 2012 Backbreak is one of the unfavorable blasting results, which can be defined as the unwanted rock breakage behind the last row of blast holes. Blast pattern parameters, like stemming, burden, delay timing, stiffness ratio (bench height/burden) and rock mass conditions (e.g., geo-mechanical properties and joints), are effective in backbreak intensity. Till date, with the exception of …
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Get PriceAir decking for pre-splits, significantly reducing your powder factor. When loading de-watered blast holes, you can deck above the water and use less emulsion. Deck for stemming to prevent contamination of the explosives. Air decking for standing off the coal/ore bed to reduce shock damage. For multi decking in through seam blasting.
Get PriceThe mining sector dominates the global industrial explosives. This is due to the high demand for explosives in new and upcoming mining activities across the globe. Major segments include coal mining, metal mining, and quarry and non-metal mining.
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Get PriceNov 01, 2015 A French mining method, called Blasting Gallery (BG), utilized long hole drilling and blasting approach to extract the full height (10–12 m) of a thick and developed coal seam in one lift. This method involved drilling holes right through the entire thickness of the seam ( Fig. 4 a) in a systematic fan cut fashion to bring the roof coal band ...
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Get PriceA term typically used in coal mining to refer to a separate process of overburden removal, prior to the main pass of the dragline or stripping fleet. Production Blasting. The type of blasting most commonly used in a mine, as distinct from development, trim, presplit, ramp or other special blasts. Powder Factor
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Get PriceSep 13, 2010 Powder Factor is the relationship of Explosives to Volume. It describes how much explosives are needed to blast a particular volume of rock. …
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