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The Pushbeam system can penetrate nearly 1 000 feet 300 m into the coal seam One patented Highwall mining system uses augers enclosed inside the Pushbeam that prevent the mined coal from being contaminated by rock debris during the conveyance process

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2016 Coal Operators Conference The University of Wollongong 522 10 – 12 February 2016 A REVIEW OF HIGHWALL MINING EXPERIENCE AND PRACTICE Sungsoon Mo 1 Chengguo Zhang Ismet Canbulat and Paul Hagan Abstract The highwall mining method originated in the USA in the 1940s The aim of the method was to recover coal from a surface mine that has reached its economic limit

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Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice typically 0 6–1 0 m thick The longwall panel the block of coal that is being mined is typically 3–4 km long and 250–400 m wide

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Highwall mining is an efficient proven and durable method for mining coal from exposed horizontal seams producing an average of 110 000 tonnes 120 000 tons of coal per month in coal seams up to 300 m 1 000 ft in seams dipping up to 8 degrees recovering up to 70 percent of in place coal

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