尾矿库 Traditional form: 尾礦庫 Pinyin (reading): wěikuàngkù Definitions: slag heap dump of mining waste Characters: 尾 - tail; extremity, end; back, rear 矿 - mine; mineral, ore 库 - armory, treasury, warehouse Traditional characters: 尾 - tail; extremity, end; back, rear 礦 - mine; mineral, ore 庫 - armory, treasury, warehouse