Translation guide
The waste rock or mineral matter surrounding valuable ore in a mine. This is a technical term used in mining and geology.
The unwanted rock or mineral material that surrounds or is mixed with valuable ore in a deposit.
Standard technical term for gangue in mining and geology. Literally 'vein rock'.
この鉱床では脈石の割合が高い。
The proportion of gangue in this ore deposit is high.
Refers to waste rock or muck produced during mining or tunneling. More common in practical mining contexts than 脈石.
Literally 'waste rock'. Used in mining and mineral processing, but can also refer to any discarded stone.
Term used mainly in coal mining for waste rock or shale mixed with coal. Can also refer to coal mine spoil heaps.
炭鉱のボタ山が崩れた。
The coal mine's gangue heap collapsed.
For general mining contexts, 脈石 (みゃくせき) is the safest technical term. In field operations or casual speech among miners, ずり is often used. 廃石 is more common in processing plants. ボタ is specific to coal mining.
We dispose of the gangue that comes out of the mine tunnel.
Gangue is removed in the ore-dressing process.