Appendix E: Coal Mining and Processing Methods | Coal ,
In surface mining, the ground covering the coal seam (the overburden) is first removed to expose the coal seam for extraction The elements of a surface mining operation are (1) topsoil removal and storage for later use, (2) drilling and blasting the strata overlying the coal seam, (3) loading and .
machines for coal mines for surface exploitation ,
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Strip mining is used when coal seams are located close to the surface It relies on very large machinery and requires many fewer workers per unit of coal First, vegetation and soil are removed from the immediate surface