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

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

Tunnel Construction ›› 2012, Vol. 32 ›› Issue (4): 566-570.DOI: 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

ZENG Liang¹, LI Lu²

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

Received:2012-02-27 Revised:2012-04-22 Online:2012-08-20 Published:2012-10-16

Abstract

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

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.

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

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