A piece of wood tapering
to a thin edge and used for tightening in conventional
timbering.
Weight
Fracturing
and lowering of the roof strata at the
face as a result of mining operations,
as in "taking weight".
Winze
Secondary or tertiary vertical or near-vertical
opening sunk from a point inside a mine for the
purpose of connecting with a lower level or of
exploring the ground for a limited depth below
a level.
Working
Face
Any place in a mine where material
is extracted during a mining cycle.