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Application of Explosive Stemming Apparatus in Burn Cut Blasting
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Mou-jin LINa, b, Jin ZHANGa, Xiao-kang DENGa, Bing XUEa, b, Chuan-jin PUa, b, Xiao-man YAOa
Blasting | 2023, 40(3) : 20 - 23
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Blasting | 2023, 40(3): 20-23
• THEORETICAL AND TECHNOLOGICAL EXPLORATION •
Application of Explosive Stemming Apparatus in Burn Cut Blasting
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Mou-jin LINa, b, Jin ZHANGa, Xiao-kang DENGa, Bing XUEa, b, Chuan-jin PUa, b, Xiao-man YAOa
Affiliations
  • a.School of Resources and Environment, Southwest University of Science and Technology, Mianyang 621010, China
  • b.Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China
Published: 2023-09-01 doi: 10.3963/j.issn.1001-487X.2023.03.003
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A kind of explosive stemming apparatus with detonating cord was placed in a simulated blast hole to evaluate its blocking effect, and then a uniaxial compression test was performed on it using a universal testing machine. The result showed that the compressive strength of the explosive stemming apparatus after being in contact with the blast hole wall was 26.5~35 MPa, and the shear strength was 3.07~3.4 MPa, which was much higher than the shear strength of conventional stemming materials (0.09 MPa). The explosive stemming apparatus was applied on cut blast in tunnel excavation together with optimizing the original blast hole layout. It turned out that the number of cut holes reduced by 35% compared to before optimization while maintaining the same excavation depth, and the hole spacing increased accordingly, which reduced the risk of piercing adjacent cut holes and effectively improved construction efficiency. Therefore, combining the explosive stemming apparatus with stemming material can greatly enhance the blocking effect and prevent premature gas escape. This effect can further extend the gas action duration in the blast hole, and improve the throwing effect of explosion gases by fully exerting the gas wedge rock breaking effect.

underground blasting  /  stemming  /  polyurethane elastomer  /  shear strength  /  burn cut  /  detonation gas
Mou-jin LIN, Jin ZHANG, Xiao-kang DENG, Bing XUE, Chuan-jin PU, Xiao-man YAO. Application of Explosive Stemming Apparatus in Burn Cut Blasting[J]. Blasting, 2023 , 40 (3) : 20 -23 . DOI: 10.3963/j.issn.1001-487X.2023.03.003
Funding
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  • The National Natural Science Foundation of China(12172313; 11802255)
  • Open funding of Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province(20kfgk06)
Appendix
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Year 2023 volume 40 Issue 3
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81
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Article Info
doi: 10.3963/j.issn.1001-487X.2023.03.003
  • Receive Date：2022-06-13
  • Online Date：2026-03-20
  • Published：2023-09-01
Article Data
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History
  • Received：2022-06-13
Funding
The National Natural Science Foundation of China(12172313; 11802255)
Open funding of Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province(20kfgk06)
Affiliations
    a.School of Resources and Environment, Southwest University of Science and Technology, Mianyang 621010, China
    b.Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China

Corresponding:

XUE Bing (1989-), male, associate professor, doctor, the main research fields are explosion mechanics and energetic materials, (E-mail) .
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表12种不同金属材料的力学参数
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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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