Journal of Northeastern University ›› 2006, Vol. 27 ›› Issue (1): 88-91.DOI: -

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Selection and numerical simulation of stepwise mining sequence

Li, Yuan-Hui (1); Liu, Wei (2); Xie, Shi-Jun (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) School of Resources and Environment, Guangxi University, Nanning 530004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-01-15 Published:2013-06-23
  • Contact: Li, Y.-H.
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Abstract: Numerical simulation was conducted using the FEM software 2D-σ for the stress field and displacement field of the deep orebody mined in different Stepwise sequences. The results showed that the failure of stope roofs, displacement and vertical stress in overhead mining sequence are all smaller than those in underhand mining and, especially during the final mining of an ore deposit. The subsidence zone and displacements of both stope roofs and side struts of all steps in overhead mining are all smaller than in underhead mining. For this reason, the mining operation in overhand Stepwise sequence will benefit the improvement of stability of stope so as to mitigate even avoid the rockburst induced by deep hard rock exploitation. In view of sloping process, the overhead mining sequence is preferable to developing no-waste mining technology with significant econo-social benefits available.

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