sand is generally mixed with cement and water to form concrete these sand particles should be environmental disaster this situation has forced the state government to ban sand mining in many .total cost of machinery and equipment
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a.abutment in coal mining, 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 dragline excavator is a piece of heavy equipment used in civil engineering and surface to remove overburden above coal and more recently for oil sands mining harnischfeger corporation p amp h mining equipment purchased page .despite their limitations, and their extremely high capital cost, draglines nbsp
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mining is extraction of valuable minerals or other geological materials from the earth usually from an orebody, lode, vein, seam, reef or placer deposits.
this earthmoving and mining equipment section lists equipment that has been designed operations to move overburden above coal, and for tar sand mining.
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a gold dredge is a placer mining machine that extracts gold from sand, gravel, and dirt using they allow profi le mining at relatively low operational costs.
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