Underground Hydraulic Mining
High-pressure water jets have also been used in the underground mining of coal, to break up the coal seam and wash the resulting coal slurry toward a collection point. The high-pressure water nozzle is referred to as the 'hydro monitor'.
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Famous quotes containing the words underground and/or mining:
“The only free road, the Underground Railroad, is owned and managed by the Vigilant Committee. They have tunneled under the whole breadth of the land.”
—Henry David Thoreau (1817–1862)
“It’s a mining town in lotus land.”
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