Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine
In an open-pit mine in Xinjiang, part of the stripped area is covered by burnt rock. Due to the low strength and fragility of burnt rock, dust is more easily generated during blasting. Taking the mining area as the research background, the mechanical property parameters of burnt rock were tested, an...
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| Format: | Article |
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Frontiers Media S.A.
2022-03-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.832650/full |
| _version_ | 1830512322385281024 |
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| author | ZhengZhao Jia ZiLing Song JunFu Fan JuYu Jiang ShuPeng Guo |
| author_facet | ZhengZhao Jia ZiLing Song JunFu Fan JuYu Jiang ShuPeng Guo |
| author_sort | ZhengZhao Jia |
| collection | DOAJ |
| description | In an open-pit mine in Xinjiang, part of the stripped area is covered by burnt rock. Due to the low strength and fragility of burnt rock, dust is more easily generated during blasting. Taking the mining area as the research background, the mechanical property parameters of burnt rock were tested, and the blasting parameter design of on-site operation was understood. The blasting numerical simulation of burnt rock step was carried out by using a numerical simulation software (LS-DYNA). From the angle of stress on rock, the stress cloud and stress curve of numerical simulation are analyzed, and it is concluded that the fundamental reason for the large dust production in blasting operation is that the burnt rock is crushed excessively after the action of explosion wave, and the explosive energy is too large, which is converted into kinetic energy to drive the dust to escape. In order to improve the utilization rate of explosives and reduce the output of blasting dust, the original blasting parameters were optimized as 8-m hole spacing, 6.5-m row spacing, 0.21-kg/m³ unit explosive consumption, 1-m interval charge, and 55-ms short-delay blasting through numerical simulation and orthogonal experiment. In the mining area, the measures of dustproof and dust reduction by blasting protection blanket and dust absorption cotton are adopted. Combined with the optimized blasting parameters, the field test proves that the dust removal efficiency is up to 82.4%. |
| first_indexed | 2024-12-22T02:26:08Z |
| format | Article |
| id | doaj.art-3a36b08194d64c0d83a7c9b7086f098a |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-22T02:26:08Z |
| publishDate | 2022-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-3a36b08194d64c0d83a7c9b7086f098a2022-12-21T18:41:59ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-03-011010.3389/feart.2022.832650832650Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit MineZhengZhao Jia0ZiLing Song1JunFu Fan2JuYu Jiang3ShuPeng Guo4College of Mining, Liaoning Technical University, Fuxin, ChinaCollege of Environment, Liaoning Technical University, Fuxin, ChinaCollege of Mining, Inner Mongolia University of Technology, Hohhot, ChinaCollege of Mining, Liaoning Technical University, Fuxin, ChinaCollege of Mining, Liaoning Technical University, Fuxin, ChinaIn an open-pit mine in Xinjiang, part of the stripped area is covered by burnt rock. Due to the low strength and fragility of burnt rock, dust is more easily generated during blasting. Taking the mining area as the research background, the mechanical property parameters of burnt rock were tested, and the blasting parameter design of on-site operation was understood. The blasting numerical simulation of burnt rock step was carried out by using a numerical simulation software (LS-DYNA). From the angle of stress on rock, the stress cloud and stress curve of numerical simulation are analyzed, and it is concluded that the fundamental reason for the large dust production in blasting operation is that the burnt rock is crushed excessively after the action of explosion wave, and the explosive energy is too large, which is converted into kinetic energy to drive the dust to escape. In order to improve the utilization rate of explosives and reduce the output of blasting dust, the original blasting parameters were optimized as 8-m hole spacing, 6.5-m row spacing, 0.21-kg/m³ unit explosive consumption, 1-m interval charge, and 55-ms short-delay blasting through numerical simulation and orthogonal experiment. In the mining area, the measures of dustproof and dust reduction by blasting protection blanket and dust absorption cotton are adopted. Combined with the optimized blasting parameters, the field test proves that the dust removal efficiency is up to 82.4%.https://www.frontiersin.org/articles/10.3389/feart.2022.832650/fullopen-pit mineblasting dustblasting parameter optimizationshort-delay blastingcharge constitutiondust suppression measures |
| spellingShingle | ZhengZhao Jia ZiLing Song JunFu Fan JuYu Jiang ShuPeng Guo Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine Frontiers in Earth Science open-pit mine blasting dust blasting parameter optimization short-delay blasting charge constitution dust suppression measures |
| title | Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine |
| title_full | Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine |
| title_fullStr | Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine |
| title_full_unstemmed | Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine |
| title_short | Numerical Simulation Study on Dust Suppression Mechanism of Burning Rock Blasting in Open-Pit Mine |
| title_sort | numerical simulation study on dust suppression mechanism of burning rock blasting in open pit mine |
| topic | open-pit mine blasting dust blasting parameter optimization short-delay blasting charge constitution dust suppression measures |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.832650/full |
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