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Study on Dynamic Stability of Toppling Dangerous Rock Mass under Blasting Vibration Considering Size Effect
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Xin-yu QUa, Hong-tao LIa, b, Qiang YAOa, b, Cheng LIa, Si-min FENGa
Blasting | 2023, 40(1) : 154 - 159
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Blasting | 2023, 40(1): 154-159
• BLASTING SAFETY •
Study on Dynamic Stability of Toppling Dangerous Rock Mass under Blasting Vibration Considering Size Effect
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Xin-yu QUa, Hong-tao LIa, b, Qiang YAOa, b, Cheng LIa, Si-min FENGa
Affiliations
  • a.State Key Laboratory of Hydraulics and Mountain River Engineering, Chengdu 610065, China
  • b.College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China
Published: 2023-03-01 doi: 10.3963/j.issn.1001-487X.2023.01.021
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The stability calculation is the key to prevent and control the geological disaster of dangerous rock collapse, which is of great practical and prediction significance. However, the quasi-static method cannot depict the influence of factors as the shape and geometric size of the dangerous rock mass, the frequency and initial phase on the actual blasting vibration load. Based on conventional pseudo-static analysis and the slice method, a blasting dynamic stability analysis method considering size effect is established. This calculation program is compiled by using MATLAB. The results indicate that the calculated minimum stability coefficients of dangerous rock mass vary periodically with the initial phase of the blasting seismic waves. For a given calculation with specific parameters, the coefficients are proximate to those calculated by conventional quasi-static analysis. The relative difference of these two calculations is between 5.1% and 8.2%, which indicates the calculation method and program are reasonable and effective. When the number of slices is 1, the calculated results of the program are equivalent to those calculated by traditional quasi-static method. The method proposed in this study provides a reference for dynamic stability analysis and evaluation for dangerous rock mass.

dangerous rock mass  /  blasting vibration  /  size effect  /  stability calculation program
Xin-yu QU, Hong-tao LI, Qiang YAO, Cheng LI, Si-min FENG. Study on Dynamic Stability of Toppling Dangerous Rock Mass under Blasting Vibration Considering Size Effect[J]. Blasting, 2023 , 40 (1) : 154 -159 . DOI: 10.3963/j.issn.1001-487X.2023.01.021
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Year 2023 volume 40 Issue 1
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Article Info
doi: 10.3963/j.issn.1001-487X.2023.01.021
  • Receive Date：2022-09-14
  • Online Date：2026-03-19
  • Published：2023-03-01
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  • Received：2022-09-14
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Affiliations
    a.State Key Laboratory of Hydraulics and Mountain River Engineering, Chengdu 610065, China
    b.College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China
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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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