columnar ore shoot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。 - In open stopes the ground above the stope will support its own weight.So the stope is shaped like a series of rooms divided by walls or supported by pillars of ore.
空場回採工作面利用采場上方的岩層支撐自身的重量，所以采場被切割成一系列的由礦壁分隔或用礦柱支撐的峒室。
