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Glossary of Mining Terms - 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 of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the ...
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Pacific Bit is a leading supplier of Equipment for Mining and Rock Drilling. We have the Equipment for Mining or Rock Drilling equipment you are looking for.
Manufacturer of DTH rock drilling bits, tools, hammers, pdc bits, hammer bits, drag bits, hole openers 877-473-2299, Texas USA
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