ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2011, Vol. 31 ›› Issue (4): 515-518.
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QIU Chengbing
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Abstract:
The application of mucking through muckdropping boreholes in the sinking of the vertical shafts on the branch of No. 6 line of Chongqing Metro is analyzed. Conclusions drawn are as follows: 1) Mucking through muckdropping boreholes can accelerate the shaft sinking and reduce the shaft sinking cost when the vertical shafts are deep, have large crosssection and have underground galleries stretching from the shaft bottoms toward the ground surface; 2) It is rapid, safe and reliable to drill muckdropping boreholes by rotary drilling rigs.
Key words: vertical shaft, muckdropping borehole, mucking, rotary drilling rig
QIU Cheng-Bing. Application of Muckdropping Borehole in Sinking of Vertical Shafts in Mountainous Area[J]. Tunnel Construction, 2011, 31(4): 515-518.
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