ore pillar的用法和样例：
例句
- Ore pillars are fasic units forming this deposit,the occurrence of which are coincident with the two sets of structure lines.
矿柱是组成该类矿床的基本单元，其产状与两组构造的交线产状基本一致。 - 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.
后沟金矿采用平底结构浅孔留矿法先采矿房，后用中深孔崩落法回采矿柱，经两年多的生产实践，取得较好的技术经济指标。
