Application of Deephole Loosening Blasting Technology in Shield  Tunneling through Longdistance Hard Rocks

ZENG Liang, LI Lu

doi:10.3973/j.issn. 1672-741X.2012.04.024

Tunnel Construction >

2012 , Vol. 32 >Issue 4: 566 - 570

DOI: https://doi.org/10.3973/j.issn. 1672-741X.2012.04.024

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Application of Deephole Loosening Blasting Technology in Shield  Tunneling through Longdistance Hard Rocks

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(1. China Railway Tunnel Survey & Design Institute Co., Ltd., Tianjin 300133, China;  2. Shenzhen Metro Group Co., Ltd., Shenzhen 518026, Guangdong, China)

Received date: 2012-02-27

Revised date: 2012-04-22

Online published: 2012-10-16

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Abstract

Deephole loosening blasting technology is adopted in shield tunneling in Chegongmiao stationHongshuwan station section on Line 11 of Shenzhen Metro. The method adopted guarantees the rapid and safe tunneling in the hard rock sections. Deephole loosening blasting technology is a very important assistant countermeasure in shield tunneling in longdistance hard rock section.

Key words： shieldbored tunnel; hard rock; deephole loosening blasting; spacing

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ZENG Liang, LI Lu . Application of Deephole Loosening Blasting Technology in Shield  Tunneling through Longdistance Hard Rocks[J]. Tunnel Construction, 2012 , 32(4) : 566 -570 . DOI: 10.3973/j.issn. 1672-741X.2012.04.024

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