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(lèi)礦床的基本單元，其產(chǎn)狀與兩組構造的交線(xiàn)產(chǎn)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(chǎng)回采工作面利用采場(chǎng)上方的巖層支撐自身的重量，所以采場(chǎng)被切割成一系列的由礦壁分隔或用礦柱支撐的峒室。
