矿柱

mine prop的用法和样例：

例句

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。
Therefore, the mining technology of the permanent waterproof jambs in Kangjiawan Mine is entirely feasible using the backfilling method with the parameters above.因此，在满足以上研究参数条件下，采用充填法对康家湾永久防水矿柱进行回收是完全可行的。

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acute squints in myositis

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as the spark fly upward