colliery

名词 colliery:

1. a workplace consisting of a coal mine plus all the buildings and equipment connected with it
   同义词：pit

col.lier.y

n.（名词）
【复数】 col.lier.ies
A coal mine together with its physical plant and outbuildings.
煤矿场：包括设备与建筑物的煤矿