mine
Mining refers to all industrial activities that mining, extracting and improving the quality of valuable minerals from underground or on-ground ore, ore, or vein layer. Article 4 of the Mining Act of Korea defines 'prospecting and mining of minerals and related mining, smelting and other businesses'. Minerals obtained through mining include bauxite, coal, iron, precious metals, lead, limestone, nickel, phosphate, rock salt, tin, uranium, molybdenum and so on. In a broad sense, mining includes crude oil and natural gas as well as even water.