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Current Application Situation of Nonpillar Sublevel Caving Method

An Hong (Nanshan Mining Co., Maanshan Iron & Steel Group) Hu Xingbao (Maanshan Institute of Mining Research)  
In the light of the problems in the nonpillar mining, the formation and principles of the wide spacing and the low lean ore drawing process are presented. Using this structure and this process is an effective method to reduce product costs.
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