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 ...
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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 ...
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The metal smelting and refining industry processes metal ores and scrap metal to obtain pure metals. The metal working industries process metals in order to ...
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Cage — In a mine shaft, the device, similar to an elevator car, that is used for hoisting personnel and materials. Calorific value — The quantity of heat that can ...
Past and future—Jerry Howells'' V4 sits in front of our first project, the Seal engine. (Click on photo to enlarge.) The Howell V4 Engine Project
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