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author:

Qi, Fangxia (Qi, Fangxia.) [1] | Zhou, Wenhai (Zhou, Wenhai.) [2] | Bao, Juan (Bao, Juan.) [3] | Lou, Xiaoming (Lou, Xiaoming.) [4] | Hu, Caizhi (Hu, Caizhi.) [5] | Liang, Rui (Liang, Rui.) [6]

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Abstract:

To study the rock’s damage characteristics near the blast-hole in high slopes and throwing trajectory under blasting load, a numerical model of the high slope throwing blasting rock was established by using the HJC fracture damage evolution model (Holmquist–Johnson–Cook) combined with ANSYS/LS-DYNA. Based on the slope blasting simulation results, the rock’s fracture damage range and the fracture and crack zones’ radii are determined. Meanwhile, the correlation between the fracture damage range, the rock’s damage degree near the blast-hole and the distance from the center of explosion, particle peak vibration velocity, compressive strength as well as dynamic tensile strength is investigated. Based on the above, three methods are put forward to determine the damage PPV threshold of the near-field rock, that is, vpp∗ can be obtained by the maximum tensile stress criterion, by establishing a statistical correlation between the peak tensile stress and PPV, and by the rock’s damage degree (D = 0.19). By controlling the blast-hole charge’s uncoupled charging coefficient, the rock’s damage range near the blast-hole, as well as the functional relationship between the explosion center distance and the damage degree near the blast-hole under the condition of 4 kinds of uncoupled coefficient are determined. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

Keyword:

Blasting Compressive strength Explosives Fracture Rock bursts Rocks Tensile strength Tensile stress Vibrations (mechanical)

Community:

  • [ 1 ] [Qi, Fangxia]School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
  • [ 2 ] [Zhou, Wenhai]School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
  • [ 3 ] [Zhou, Wenhai]Key Laboratory of Mechanics on Environment and Disaster in Western China, The Ministry of Education of China, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou; 730000, China
  • [ 4 ] [Bao, Juan]College of Safety Engineering, Lanzhou University of Resources and Environment, Lanzhou; 730020, China
  • [ 5 ] [Lou, Xiaoming]College of Zijin Geology and Mining, Fuzhou University, Fuzhou; 350116, China
  • [ 6 ] [Lou, Xiaoming]Institute of Blasting Technology, Fuzhou University, Fuzhou; 350116, China
  • [ 7 ] [Hu, Caizhi]Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730099, China
  • [ 8 ] [Liang, Rui]School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China

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Geotechnical and Geological Engineering

ISSN: 0960-3182

Year: 2025

Issue: 6

Volume: 43

1 . 7 0 0

JCR@2023

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ESI Highly Cited Papers on the List: 0 Unfold All

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30 Days PV: 0

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