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Field Application of Mixed Emulsion Explosives with Decked Charge Technology in an Open-pit Mine
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Jian-hua ZHANG1, Jia-le LI1, Ken ZHANG2, Qiang ZHAO3, Gang HUANG1, Ben LIU4, Su-chen JIANG1, Wei-tao LIANG1, Liang ZHAO1, N M MUNYARADZI1
Blasting | 2025, 42(1) : 63 - 70
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Blasting | 2025, 42(1): 63-70
• BLASTING IN ORE AND ROCK •
Field Application of Mixed Emulsion Explosives with Decked Charge Technology in an Open-pit Mine
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Jian-hua ZHANG1, Jia-le LI1, Ken ZHANG2, Qiang ZHAO3, Gang HUANG1, Ben LIU4, Su-chen JIANG1, Wei-tao LIANG1, Liang ZHAO1, N M MUNYARADZI1
Affiliations
  • 1.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
  • 2.Anhui Jiangnan Chemical Industry Co., Ltd., Hefei 230031, China
  • 3.North Blasting Technology Co., Ltd., Beijing 100097, China
  • 4.Huaxin Cement (Chenzhou) Co., Ltd., Chenzhou 423022, China
Published: 2025-01-10 doi: 10.3963/j.issn.1001-487X.2025.01.008
Outline
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To investigate the effects of decked charge structure on the energy transfer and blasting outcomes, a study was conducted to improve the energy utilization rate of explosives and enhance the blasting impact based on the blasting operations of a limestone mine in Chenzhou. Combining LS-DYNA numerical simulations with on-site optimization experiments, this research examined the rock stress distribution across different charge structures during bench blasting. Simulations were performed on four charge structures: continuous charge, 0.6 m deck, 1.0 m deck, and 1.5 m deck, with effective stress monitored at key points. Field optimization experiments were then conducted using a novel transmissible explosive deck to analyze the overall blasting performance of the blast pile. The research results indicate that the rock damage extent and average maximum effective stress reach peak values at a 1.0 m deck length, resulting in favorable fragmentation. In field tests, the decked charge reduced the powder factor from 0.199 kg/t to 0.179 kg/t, lowered the fine ore rate by 6.54%, reduced the oversize rate by 3.7%, and increased the average block size by 5 cm. This approach minimized energy wastage and resolved uneven fragmentation issues with mixed emulsion explosives, enhancing the mine's economic efficiency.

mixed emulsion explosives  /  air decking  /  numerical simulation  /  block rate  /  fine ore rate
Jian-hua ZHANG, Jia-le LI, Ken ZHANG, Qiang ZHAO, Gang HUANG, Ben LIU, Su-chen JIANG, Wei-tao LIANG, Liang ZHAO, N M MUNYARADZI. Field Application of Mixed Emulsion Explosives with Decked Charge Technology in an Open-pit Mine[J]. Blasting, 2025 , 42 (1) : 63 -70 . DOI: 10.3963/j.issn.1001-487X.2025.01.008
Funding
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  • National Natural Science Foundation of China(42271296)
Appendix
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Year 2025 volume 42 Issue 1
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104
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Article Info
doi: 10.3963/j.issn.1001-487X.2025.01.008
  • Receive Date：2024-09-18
  • Online Date：2026-03-18
  • Published：2025-01-10
Article Data
Affiliations
History
  • Received：2024-09-18
Funding
National Natural Science Foundation of China(42271296)
Affiliations
    1.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
    2.Anhui Jiangnan Chemical Industry Co., Ltd., Hefei 230031, China
    3.North Blasting Technology Co., Ltd., Beijing 100097, China
    4.Huaxin Cement (Chenzhou) Co., Ltd., Chenzhou 423022, China

Corresponding:

HUANG Gang(1986-), male, bron in Huanggang city, Hubei province, associate professor, Ph. D, master's supervisor, engaged in teaching and research in mining, blasting and safety, (E-mail) .
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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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