大断面硬岩巷道聚能爆破快速掘进技术的应用

doi:10.11799/ce201311014

Abstract

Abstract:

According to the characteristics of large section and hard rock and high stress, and problem of low advancing blasting efficiency and footage and serious overbreak and underbreak on rock roadway advancing in Fourth Mine of Pingdingshan TianAn Coal Co.,LTD, we adopted the speedy advancing technique by shaped charge blasting, and used shaped charge device in advancing blasting work, and then designed work program of shaped charge blasting. The shaped charge blasting engineering practice showed that, compared with original parameters, the new parameters could increase the footage by 15% and reduce the amount of overbreak and underbreak on roadway surrounding rock by 50% and save the cost by 20%, and achieve good technology economic results.

Key words: large section, hard rock roadway, shaped charge blasting, speedy advancing

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URL: http://www.coale.com.cn/EN/10.11799/ce201311014

http://www.coale.com.cn/EN/Y2013/V45/I11/40

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Applications of Speedy Advancing Technique by Shaped Charge Blasting for Hard Rock Roadway with Large Section

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