Colliery

A colliery is a coal mine where coal is extracted from underground tunnels. It includes the facilities and operations needed for digging, extracting, and processing coal, as well as supporting infrastructure like shafts, machinery, and worker accommodations. Collieries play a crucial role in supplying coal for energy production, industry, and heating. The term generally refers to the entire mining site and its associated activities, emphasizing the industrial process of accessing and removing underground coal deposits safely and efficiently.