ore pillar的用法和樣例：
例句
- Ore pillars are fasic units forming this deposit,the occurrence of which are coincident with the two sets of structure lines.
礦柱是組成該類礦床的基本單元，其產狀與兩組構造的交線產狀基本一致。 - As a result,the short hole shrinkage method with flat bottom structure was employed to mine the stope firstly,then stoping ore pillar by medium length hole caving method.
后溝金礦採用平底結構淺孔留礦法先採礦房，後用中深孔崩落法回採礦柱，經兩年多的生產實踐，取得較好的技術經濟指標。
