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  • Glossary of Mining Terms - Kentucky Coal Education

    A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back ...

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  • MiningWeekly.com | Breaking News | Real-Time Mining News

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  • Petra Diamonds | Kimberley Ekapa Mining JV

    Blue Moon. This 12-carat, internally flawless, fancy, vivid Blue Moon diamond was cut from the 29.6 carat rough stone discovered at Petra's Cullinan mine in January 2014.

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    Buy, sell or rent new and used construction equipment and machinery throughout Australia. ConstructionSales.com.au is the leading online construction equipment and machinery website in Australia.

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    Fayetteville, AR Phone: 479-442-8284. Berryville, AR Phone: 870-423-4226. Fayetteville, AR Phone: 479-442-8284

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  • Glossary of Mining Terms - Kentucky Coal Education

    A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back ...

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  • Glossary of Mining Terms - rocksandminerals.com

    Back — The roof or upper part in any underground mining cavity. Backfill — Mine waste or rock used to support the roof after coal removal. Barren — Said of rock or vein material containing no minerals of value, and of strata without coal, or containing coal in seams too thin to be workable.

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  • Venetia Diamond Mine - Mining Technology

    The Venetia diamond mine, which opened in 1992, is De Beers Consolidated Mines' flagship operation. Situated 80km from Musina (formerly...Read More...

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  • Petra Diamonds | Kimberley Ekapa Mining JV

    Blue Moon. This 12-carat, internally flawless, fancy, vivid Blue Moon diamond was cut from the 29.6 carat rough stone discovered at Petra's Cullinan mine in January 2014.

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  • Mechanical screening - Wikipedia

    Mechanical screening, often just called screening, is the practice of taking granulated ore material and separating it into multiple grades by particle size.. This practice occurs in a variety of industries such as mining and mineral processing, agriculture, pharmaceutical, food, plastics, and recycling.

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