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並前往https://books.google.com.tw/books?id=U3nNBjNPiU4C&pg=PR7&lpg=PR7&dq=shrinkage+stoping&source=bl&ots=PJGmJRz6p4&sig=ACfU3U3N_22s4KGuTP6FjLd38QzlMUUEVg&hl=zh-TW&sa=X&ved=2ahUKEwj9reDV9_b1AhWOIbcAHXD_CnsQ6AF6BQjWAhAD

Stoping Methods and Cost - 第 389-396 卷 - 第 vii 頁 - Google 圖書結果

Open stoping without pillars in small ore body-2. Sublevel stoping-3. Open stoping with casual pillars-4. Example of open stoping with regular pillars . 5.

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