Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (10): 1486-1490.DOI: 10.12068/j.issn.1005-3026.2017.10.024

• Resources & Civil Engineering • Previous Articles     Next Articles

Stage Blasting Technology of Large and Thick Steeply Inclined Orebody

ZHAI Hui-chao1, REN Feng-yu1, NAN Shi-qing2   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. Hebei Iron Steel Group Mining Design Co., Ltd., Tangshan 063000, China.
  • Received:2016-03-09 Revised:2016-03-09 Online:2017-10-15 Published:2017-10-13
  • Contact: ZHAI Hui-chao
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Abstract: Aiming at the safety problem of Sijiaying southern district large-scale mining district, a lateral drilling blasting scheme including formed trench by the fan hole and lateral caving by the vertical deep hole was proposed, which has characteristics of a small amount of engineering, high degree of mechanization and simple management, etc. In addition, the rationality and shock absorption of large scale blasting initiation order and the non-destructive effect of blasting on rock and filling body were verified through dynamic simulation on the plastic zone, monitoring vibration velocity and stress field by FLAC3D. Meanwhile, the construction technology of cutting patio using VCR method, adopting center and cross diamond pattern for designing the hole, and using 5 sections of initiation among holes were studied to ensure the formation of blasting free space.

Key words: large and thick steeply inclined orebody, vertical deep hole blasting, numerical simulation, FLAC3D, VCR method

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