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Study on Pre-Splitting Blasting Parameters of a Small-Dip Open-Pit Bench Slope in Yunnan
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Hao LIU1, Zehu ZHAO2, Zengzai LYU1, Shuo YAN1, Jingming GAO1
Mining Research and Development | 2026, 46(2) : 92 - 98
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Mining Research and Development | 2026, 46(2): 92-98
Study on Pre-Splitting Blasting Parameters of a Small-Dip Open-Pit Bench Slope in Yunnan
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Hao LIU1, Zehu ZHAO2, Zengzai LYU1, Shuo YAN1, Jingming GAO1
Affiliations
  • 1.Yunnan Geological and Mineral Construction Engineering Co., Ltd., Kunming, Yunnan 650200, China
  • 2.Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
Published: 2026-02-25
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At present, pre-splitting blasting technology is not used in the construction of bench slope in an open-pit in Yunnan, which leads to unsatisfactory slope forming effect. In order to improve the forming quality and design coincidence rate of the bench slope with small-dip in the stope, the pre-splitting blasting test was carried out for the 55° gentle slope. Using the control variable method, the field control test was carried out with the pre-splitting hole spacing, line charge density and hole diameter as variables. The test results show that it is feasible to use the pre-splitting blasting method to realize the forming of the gentle bench slope with a small-dip of 55° in the blasting area. The quality of the slope is significantly improved after blasting, and the design coincidence rate is high. When the hole spacing is 1.3 m, the hole diameter is 115 mm, and the linear charge density is 0.8 kg/m, the test area achieves the best blasting effect, and the residual hole mark rate of the blast hole is about 80%.

Gently inclined slope  /  Pre-splitting blasting  /  Residual hole mark rate  /  Blasting parameter
刘浩, 赵泽虎, 吕增在, 严硕, 高镜明. 云南某小倾角露天靠帮边坡预裂爆破参数研究. 矿业研究与开发, 2026 , 46 (2) : 92 -98 .
Hao LIU, Zehu ZHAO, Zengzai LYU, Shuo YAN, Jingming GAO. Study on Pre-Splitting Blasting Parameters of a Small-Dip Open-Pit Bench Slope in Yunnan[J]. Mining Research and Development, 2026 , 46 (2) : 92 -98 .
Appendix
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Year 2026 volume 46 Issue 2
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  • Receive Date：2025-02-25
  • Online Date：2026-10-29
  • Published：2026-02-25
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  • Received：2025-02-25
Funding
Affiliations
    1.Yunnan Geological and Mineral Construction Engineering Co., Ltd., Kunming, Yunnan 650200, China
    2.Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, 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
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Genus		 种数
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Percentage of total
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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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