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Effect of Joints on Blasting-Induced Failure Characteristics of Rock Mass
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Tianzhen SHI1, Qitao YANG1, Zhouchao DAI2, Qiyue LI3, Haixian HUANG3, Xuejiao CUI4, Jingjing MA1
Mining and Metallurgical Engineering | 2025, 45(3) : 8 - 13
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Mining and Metallurgical Engineering | 2025, 45(3): 8-13
• MINING •
Effect of Joints on Blasting-Induced Failure Characteristics of Rock Mass
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Tianzhen SHI1, Qitao YANG1, Zhouchao DAI2, Qiyue LI3, Haixian HUANG3, Xuejiao CUI4, Jingjing MA1
Affiliations
  • 1.Xizang Zhongjin Xinlian Blasting Engineering Co., Ltd., Lhasa 850200, Xizang, China
  • 2.Gansu Hesai Highway Construction Development Co., Ltd., Gannan 747000, Gansu, China
  • 3.School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
  • 4.Poly Xinlian Blasting Engineering Group Co., Ltd., Guiyang 550022, Guizhou, China
Published: 2025-06-01 doi: 10.3969/j.issn.0253-6099.2025.03.002
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Several pieces of hard paper with different numbers, dip angles and widths were embedded into specimens to simulate structure of closed joint in rock masses and prepare rock mass models with different joints. Effect of joints on blast-induced failure characteristics of rock mass was analyzed with a high-speed camera and a 3D laser scanner, so as to explore the rules of crack propagation and fragment size distribution during rock blast. It is found that joints can disperse blasting energy and hinder crack penetration, leading to a decrease in the average size of blast-induced fragments as the number of joints increases. Wider joints can make diffraction and reflection of stress waves much more complicated, intensify energy dissipation, and also hinder crack propagation；while joints with small width are prone to make blast-induced fragments smaller in size. The interaction between joint dip angle and the propagation direction of the blast stress wave can significantly affect the crack propagation mode, and excessively large dip angles can easily hinder stress wave propagation.

rock mass blasting  /  failure characteristics  /  model test  /  joint  /  fracture  /  crack propagation  /  fragment size distribution  /  stress wave
Tianzhen SHI, Qitao YANG, Zhouchao DAI, Qiyue LI, Haixian HUANG, Xuejiao CUI, Jingjing MA. Effect of Joints on Blasting-Induced Failure Characteristics of Rock Mass[J]. Mining and Metallurgical Engineering, 2025 , 45 (3) : 8 -13 . DOI: 10.3969/j.issn.0253-6099.2025.03.002
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Year 2025 volume 45 Issue 3
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Article Info
doi: 10.3969/j.issn.0253-6099.2025.03.002
  • Receive Date：2025-02-11
  • Online Date：2026-03-19
  • Published：2025-06-01
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  • Received：2025-02-11
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Affiliations
    1.Xizang Zhongjin Xinlian Blasting Engineering Co., Ltd., Lhasa 850200, Xizang, China
    2.Gansu Hesai Highway Construction Development Co., Ltd., Gannan 747000, Gansu, China
    3.School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
    4.Poly Xinlian Blasting Engineering Group Co., Ltd., Guiyang 550022, Guizhou, China
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https://castjournals.cast.org.cn/joweb/kygczz/EN/10.3969/j.issn.0253-6099.2025.03.002
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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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