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Strip mines curve number

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Strip mining , removal of soil and rock overburden above a layer or seam particularly coal , followed by the removal of the exposed mineral. The common strip-mining techniques are classified as area mining or contour mining on the basis of the deposit geometry and type. The cycle of operations for both techniques consists of vegetation clearing, soil removal, drilling and blasting of overburden if needed , stripping, removal of the coal or other mineral commodity, and reclamation. Area mining is appropriate for the extraction of near-surface, relatively flat-lying, and thin deposits of coal, phosphate, and similar minerals. Area mining usually progresses in a series of parallel deep trenches referred to as furrows or strips. The length of these strips may be hundreds of metres.
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Runoff curve number

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See also Top ten largest coal mines in the world. The following is a partial list of large U. All of these mines are still in operation. Note that figures for mines and mine complexes may include areas that are planned for future mining. No agency of the United States government has published nationwide figures for the number of acres disturbed in the process of mining coal since the U.
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Stripping ratio

Add strip mining to one of your lists below, or create a new one. Flaring up or bubbling over? Phrasal verbs to express emotions, part 2. Cambridge Dictionary Plus My profile How to
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