drift mining


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drift mining

[′drift ‚mīn·iŋ]
(mining engineering)
Working of shallow veins or beds through drifts or shafts from the surface.
References in periodicals archive ?
In drift mining, the height of working stalls - the tunnel the miners dig to get coal - is no bigger than the thickness of the coal seam.
It is concluded that the Evans pay streak historically contained higher gold values than the Telegraph, possibly as high as the reported Californian drift mining average of 0.
Although cheaper, drift mining is often a more environmentally-intrusive way of removing coal from the ground than deep coal mining.
Rising coal prices have renewed interest in drift mining, where the seams are accessed by tunnels driven from hillsides rather than costly vertical shafts.