Application of Deep Hole Break-tip Blasting Technology in Hard Roof Depressurization

LI Shugang; XING Lijie; LIU Chao; LIU Fen; CHENG Xiaoyu

Safety in Coal Mines > 2015 > 46(2): 128-131.

LI Shugang, XING Lijie, LIU Chao, LIU Fen, CHENG Xiaoyu. Application of Deep Hole Break-tip Blasting Technology in Hard Roof Depressurization[J]. Safety in Coal Mines, 2015, 46(2): 128-131.

Citation:

LI Shugang, XING Lijie, LIU Chao, LIU Fen, CHENG Xiaoyu. Application of Deep Hole Break-tip Blasting Technology in Hard Roof Depressurization[J]. Safety in Coal Mines, 2015, 46(2): 128-131.

Citation:

LI Shugang, XING Lijie, LIU Chao, LIU Fen, CHENG Xiaoyu. Application of Deep Hole Break-tip Blasting Technology in Hard Roof Depressurization[J]. Safety in Coal Mines, 2015, 46(2): 128-131.

Application of Deep Hole Break-tip Blasting Technology in Hard Roof Depressurization

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Published Date: February 19, 2015

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Abstract

Abstract

The basic principle of deep hole break-tip blasting was introduced, and the process of it was analyzed in details. The detailed scheme was designed, and the deep hole break-tip blasting was carried out successfully by manual charging. The results showed that the deep hole break-tip blasting changed the structure of overlying strata, increased the degree of roof fracture, which effectively released the energy stored in roof, avoided the stress concentration. This charging method also reduced the labor intensity and improved the charging speed, thus prevented the rock burst efficiently.
- deep hole break-tip blasting,
- manual charging,
- fracture,
- stress concentration,
- rock burst

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