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。
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。
The support for the tent is rigid. 帳篷的支柱很堅固。
Manfully cling to the pillar of Patience. 男子般氣概的你會緊握忍耐的支柱。
