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The Minerals of New York City, a review of the history of mining and …. The landscape of New York City (NYC) was arguably the most exposed and … north of Grand Central Station produced 3 million cubic yards of excavated rock.

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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 abutment, that is, the settled packs behind the face.

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Library | Bureau of Reclamation

Reclamation Library Glossary. Listed alphabetically below are definitions for terms commonly used by the Bureau of Reclamation. Clickable alphabet links have been provided at the beginning and end of the glossary to aid in searches.

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hard rock quarry clarence ny - BINQ Mining

The Minerals of New York City, a review of the history of mining and …. The landscape of New York City (NYC) was arguably the most exposed and … north of Grand Central Station produced 3 million cubic yards of excavated rock.

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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 abutment, that is, the settled packs behind the face.

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Library | Bureau of Reclamation

Reclamation Library Glossary. Listed alphabetically below are definitions for terms commonly used by the Bureau of Reclamation. Clickable alphabet links have been provided at the beginning and end of the glossary to aid in searches.

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The Engineer Mine, Atlin, British Columbia - David K. Joyce ...

Host Rocks. The host rock to all the veins and breccia zones on the Engineer Mine property is argillite and greywacke of the Laberge Group. Monzodiorite dykes related to the Sloko Group complex occur across the property, displaying varying degrees of quartz-carbonate-clay alteration.

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The Engineer Mine, Atlin, British Columbia - David K. Joyce ...

Host Rocks. The host rock to all the veins and breccia zones on the Engineer Mine property is argillite and greywacke of the Laberge Group. Monzodiorite dykes related to the Sloko Group complex occur across the property, displaying varying degrees of quartz-carbonate-clay alteration.

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Glossary of Mining Terms - Rock, Mineral and Fossil ...

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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Glossary of Mining Terms - Rock, Mineral and Fossil ...

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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