Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (3): 400-405.DOI: 10.12068/j.issn.1005-3026.2017.03.020

• Resources & Civil Engineering • Previous Articles     Next Articles

Experiment of Recovery Method for Ore Overburden in Sublevel Caving

LEI Gang1, LI Yuan-hui1, ZHANG Zhi-gui2, LI Rui3   

  1. 1. Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, China; 2. School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621000, China; 3. Pangang Lanjian Iron Mine, Panzhihua 617000, China.
  • Received:2015-10-24 Revised:2015-10-24 Online:2017-03-15 Published:2017-03-24
  • Contact: LEI Gang
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Abstract: Pangang Lanjian Iron Mine used sublevel caving method after open-pit turned to underground mining. In order to ensure the safety of mining in lower segment, around 40m ore overburden had been set aside at the top segment. To explore the best way to recover ore overburden that had reserved in the stope, similar physical simulation experiment which includes the way of no dilution drawing, low dilution drawing, cut-off grade drawing and step away from the collapse of the amount of ore to 100% was designed in laboratory. Through the comparative analysis of recovery rate, dilute rate and the integrity of ore rock interface, it is concluded that the use of no dilution drawing method in sublevel caving generates the best economic benefit, which provides reference for similar mines about recovery method of ore overburden.

Key words: sublevel caving, ore overburden, recovery method, drawing method, no dilution drawing

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