
Thickness of Crown Pillars for Hongling Lead-Zinc Mine During Transition from Stope Caving Method to Filling Method
TONG Da-zhi, WANG Guan-nan, ZHANG Chi
Mining and Metallurgical Engineering ›› 2022, Vol. 42 ›› Issue (5) : 5-9.
Thickness of Crown Pillars for Hongling Lead-Zinc Mine During Transition from Stope Caving Method to Filling Method
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