ISSN 2096-4498

   CN 44-1745/U

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Comparison between Rock-drilling Jumbo and Manual Drilling-and-Blasting of Railway Tunnel

  • JIN Ming ,
  • WANG Minghui ,
  • ZHU Jianguo ,
  • LIU Dalin ,
  • ZHANG Qiao
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  • (1. Chongqing-Wanzhou Railway Co., Ltd., Chongqing 400014, China; 2. The First Engineering Co., Ltd. of China Railway Tunnel Group, Chongqing 401121, China)

Received date: 2019-09-17

  Online published: 2020-04-04

Abstract

The further analysis on the advantages and disadvantages and the applicability of pneumatic drill and rockdrilling jumbo for high-speed railway tunnel is of great significance. The application of pneumatic drill in drilling and blasting and restrictive factors of drilling and blasting of rock-drilling jumbo in Xiaosanxia Tunnel on ZhengzhouWanzhou High-speed Railway are introduced, and comparison is made between the two methods in terms of construction efficiency, staffing, safety, overbreak/underbreak control and cost. The conclusions are drawn as follows: (1) The construction efficiency of rock-drilling jumbo in hard rock is higher than pneumatic drill; the construction method of rock-drilling jumbo can be adjusted in Grade Ⅲ and Ⅳ surrounding rocks to improve the construction efficiency; and the rock-drilling jumbo is better to avoid in soft rock. (2) The rock-drilling jumbo shows outstanding advantages in terms of labor intensity, labor consumption and safety risk. (3) The theoretical analysis indicates that the average linear overbreak by rock-drilling jumbo is smaller than that by pneumatic drill, while the actual situation is diametrically opposite; the overbreak by rock-drilling jumbo can be reduced by strengthening the management. (4) The rock-drilling jumbo is obviously superior to pneumatic drill, and with the development of mechanization of tunnel construction, the rock-drilling jumbo will become one of the development directions of underground works in the future.

Cite this article

JIN Ming , WANG Minghui , ZHU Jianguo , LIU Dalin , ZHANG Qiao . Comparison between Rock-drilling Jumbo and Manual Drilling-and-Blasting of Railway Tunnel[J]. Tunnel Construction, 2020 , 40(1) : 99 -105 . DOI: 10.3973/j.issn.2096-4498.2020.01.013

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