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Metal Mine ›› 2012, Vol. 41 ›› Issue (02): 27-29.

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Causes of Blind Shots during Medium-length Hole Blasting in Complex Stratum and its Prevention Measures

Pan Yuzhong1,Chi En′an1,2,Chen Bin1,Xu Tao1,Zhao Fei1   

  1. 1.Guizhou Xinlian Blast Engineering Limited Company;2.Mining College,Guizhou University
  • Online:2012-02-15 Published:2012-05-30

Abstract: Industrial park in Hongqiao New Area of Guizhou Liupanshui is typical karst geological features.And there is a lot of rock seepage water,caves and cracks in rock.As a result,blind shots phenomenon often appears in local places in early engineering blasting.This paper analyzes and summarizes the causes of the blind shots combining with the engineering practice,and some preventive measures are put forwards.Then,the explosion blind shot rate is reduced significantly after explosion operations according to the prevention measures.It is thus clear that these measures are feasible.

Key words: Blasting, Blind shots, Complex stratum, Prevention measures