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Analyzing Effects of Uneven Rock Surface on Performance of Shotcrete Support in Roadway Based on Laser Scanning
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Kaiyue JIN1, 2, Yujun ZUO1, Lujing ZHENG1, 2, Jianyun LIN1, Lin PAN2, Peng RONG1, Yuanjiang HOU1
Mining and Metallurgical Engineering | 2023, 43(3) : 11 - 15
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Mining and Metallurgical Engineering | 2023, 43(3): 11-15
• MINING •
Analyzing Effects of Uneven Rock Surface on Performance of Shotcrete Support in Roadway Based on Laser Scanning
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Kaiyue JIN1, 2, Yujun ZUO1, Lujing ZHENG1, 2, Jianyun LIN1, Lin PAN2, Peng RONG1, Yuanjiang HOU1
Affiliations
  • 1.College of Mining, Guizhou University, Guiyang 550025, Guizhou, China
  • 2.Guizhou Jinfeng Mining Limited, Zhenfeng 562200, Guizhou, China
Published: 2023-06-01 doi: 10.3969/j.issn.0253-6099.2023.03.003
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Guizhou Jinfeng Gold Mine was taken as an engineering example for investigating effect of geometric features of rock surface on the performance of shotcrete support in the roadway constructed by drilling and blasting. The rock surface of the roadway was scanned by using a 3D laser scanner, and a 3D geometric model was established for the roadway. The actual shape of cross-sections was created by slicing the geometric model with a 3D software for analyzing the geometric features. With numerical models respectively established for the designed and actual sections, the variation in internal forces of the shotcrete and its supporting effect for the surrounding rock were analyzed. The results show that uneven rock surface of a roadway can lead to significant increase in the shear force and bending moment of shotcrete, but relatively small effect on the axial force. It is found that concave part of surrounding rock in a roadway is subjected to maximum negative bending moment, while convex part is mostly subjected to maximum positive bending moment. Under the interaction of axial force and bending moment, the shotcrete on convex part has an obvious lower safety factor, leading to weakened support to the surrounding rock, thus tensile failure is prone to occur.

surrounding rock in roadway  /  surrounding rock support  /  3D laser scanning  /  drilling and blasting  /  uneven rock surface  /  shotcrete  /  support capacity diagram
Kaiyue JIN, Yujun ZUO, Lujing ZHENG, Jianyun LIN, Lin PAN, Peng RONG, Yuanjiang HOU. Analyzing Effects of Uneven Rock Surface on Performance of Shotcrete Support in Roadway Based on Laser Scanning[J]. Mining and Metallurgical Engineering, 2023 , 43 (3) : 11 -15 . DOI: 10.3969/j.issn.0253-6099.2023.03.003
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Year 2023 volume 43 Issue 3
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Article Info
doi: 10.3969/j.issn.0253-6099.2023.03.003
  • Receive Date：2022-12-03
  • Online Date：2026-03-05
  • Published：2023-06-01
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  • Received：2022-12-03
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Affiliations
    1.College of Mining, Guizhou University, Guiyang 550025, Guizhou, China
    2.Guizhou Jinfeng Mining Limited, Zhenfeng 562200, Guizhou, 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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