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Research on Zoning Layout Method and Application of Contour Holes for Blasting of Jointed Rock Mass Tunnel
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Kai ZHANG1a, Tie-jun TAO1b, Xing-chao TIAN1a, Xuan LIU2, He QIN2, Ming-wei ZHANG3
Blasting | 2024, 41(4) : 107 - 115
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Blasting | 2024, 41(4): 107-115
• BLASTING IN ORE AND ROCK •
Research on Zoning Layout Method and Application of Contour Holes for Blasting of Jointed Rock Mass Tunnel
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Kai ZHANG1a, Tie-jun TAO1b, Xing-chao TIAN1a, Xuan LIU2, He QIN2, Ming-wei ZHANG3
Affiliations
  • 1a.School of Civil Engineering, Guizhou University, Guiyang 550025, China
  • 1b.School of Mining and Technology, Guizhou University, Guiyang 550025, China
  • 2.Guizhou Construction Group First Construction Engineering Co., Ltd., Guiyang 550002, China
  • 3.Guizhou Highway Engineering Group Co., Ltd., Guiyang 550000, China
Published: 2024-12-01 doi: 10.3963/j.issn.1001-487X.2024.04.013
Outline
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The rock mass joints can affect the propagation of explosive stress waves. The angle between their direction and the surrounding holes and the relative position changes have different effects on the blasting effect. Based on the attenuation law of stress waves at different jointed angles, a method was proposed for zoning the surrounding holes of tunnel blasting in jointed rock masses. The parameters of the surrounding holes are optimized when the angle between the joint and the surrounding hole is 30°, 60°, 90°, and 0° (parallel). The zoning layout method was validated by combining LS-PREPOST numerical simulation and on-site tests regarding rock damage depth and blasting vibration speed. The results show that the rock mass's damage depth and blasting vibration speed under the zoning arrangement of surrounding holes are significantly better than that of the original layout plan of surrounding holes. Based on the geological conditions of the research section of the Bayueshan Tunnel of the Tongliang Anyue Expressway, the angles between the joints and the surrounding holes are set to 30°, 60°, and 90°, respectively. The spacings between the surrounding holes are set to 43 cm, 50 cm, 58 cm, and 60 cm when the joints parallel the surrounding holes. The average over-excavation value can be controlled at 18cm after blasting, and the over-consumption of concrete is controlled within 100% per linear meter.

tunnel blasting  /  numerical simulation  /  zoning layout  /  joint
Kai ZHANG, Tie-jun TAO, Xing-chao TIAN, Xuan LIU, He QIN, Ming-wei ZHANG. Research on Zoning Layout Method and Application of Contour Holes for Blasting of Jointed Rock Mass Tunnel[J]. Blasting, 2024 , 41 (4) : 107 -115 . DOI: 10.3963/j.issn.1001-487X.2024.04.013
Funding
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  • National Natural Science Foundation of China Regional Science Foundation Project(52064008)
  • Guizhou Province High level Innovative Talents (Hundred Level) Project(黔科合平台人才-GCC[2022]004-1)
  • Guizhou Provincial Science and Technology PlanProject(黔科合成果[2021]一般087)
  • Guizhou Provincial Science and Technology Plan Project(黔科合支撑[2023]一般358)
Appendix
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Year 2024 volume 41 Issue 4
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79
32
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Article Info
doi: 10.3963/j.issn.1001-487X.2024.04.013
  • Receive Date：2023-12-04
  • Online Date：2026-03-19
  • Published：2024-12-01
Article Data
Affiliations
History
  • Received：2023-12-04
Funding
National Natural Science Foundation of China Regional Science Foundation Project(52064008)
Guizhou Province High level Innovative Talents (Hundred Level) Project(黔科合平台人才-GCC[2022]004-1)
Guizhou Provincial Science and Technology PlanProject(黔科合成果[2021]一般087)
Guizhou Provincial Science and Technology Plan Project(黔科合支撑[2023]一般358)
Affiliations
    1a.School of Civil Engineering, Guizhou University, Guiyang 550025, China
    1b.School of Mining and Technology, Guizhou University, Guiyang 550025, China
    2.Guizhou Construction Group First Construction Engineering Co., Ltd., Guiyang 550002, China
    3.Guizhou Highway Engineering Group Co., Ltd., Guiyang 550000, China

Corresponding:

TAO Tie-jun (1984-), male, Ph. D, professor, doctoral supervisor, mainly engaged in research on tunnel engineering and blasting engineering, (E-mail) .
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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