短语词组短语horizontal cut and fill mining 水平分层充填采矿法horizontal cut -and-fill mining 水平分层充填采矿法upward cut -and-fill mining 上向分层采矿downward cut -and-fill mining 下向胶结充填法Cut -and-fill mining method 上向分层充填采矿法 返回 cut and fill mining