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Dynamic Effect of Shaped Charge Blasting and Its Application in Coal Seam Permeability Enhancement

[Image: see text] The dynamic effect of shaped charge blasting and its application in coal seam permeability enhancement have been investigated. Comparative experiments of shaped charge blasting and conventional blasting to fracture the concrete are carried out. Then, the propagation characteristics...

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Autores principales: Li, Xiangshang, Si, Kai, He, Tuan, Li, Chunyuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9330100/
https://www.ncbi.nlm.nih.gov/pubmed/35910146
http://dx.doi.org/10.1021/acsomega.2c02329
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author Li, Xiangshang
Si, Kai
He, Tuan
Li, Chunyuan
author_facet Li, Xiangshang
Si, Kai
He, Tuan
Li, Chunyuan
author_sort Li, Xiangshang
collection PubMed
description [Image: see text] The dynamic effect of shaped charge blasting and its application in coal seam permeability enhancement have been investigated. Comparative experiments of shaped charge blasting and conventional blasting to fracture the concrete are carried out. Then, the propagation characteristics of explosion stress waves under shaped charge blasting and conventional blasting are analyzed by ANSYS/LS-DYNA. Finally, the fracture mechanical model of shaped charge blasting is established. The experimental results show that the width of the four main cracks formed after conventional blasting is 0.3 cm, while the width of the cracks in the energy accumulation direction after shaped charge blasting is 1.1 cm and the width of that in the vertical energy accumulation direction is 0.4 cm. The numerical simulation results show that the crushing area after shaped charge blasting is “dumbbell type”, and the area is smaller than that of conventional blasting. However, the cracking area is “spindle type”, and the development of the fracture degree is better than that of conventional blasting. In addition, shaped charge blasting is used to improve the permeability of coal seams. The results show that shaped charge blasting effectively improves the permeability and gas extraction rate of coal seams.
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spelling pubmed-93301002022-07-29 Dynamic Effect of Shaped Charge Blasting and Its Application in Coal Seam Permeability Enhancement Li, Xiangshang Si, Kai He, Tuan Li, Chunyuan ACS Omega [Image: see text] The dynamic effect of shaped charge blasting and its application in coal seam permeability enhancement have been investigated. Comparative experiments of shaped charge blasting and conventional blasting to fracture the concrete are carried out. Then, the propagation characteristics of explosion stress waves under shaped charge blasting and conventional blasting are analyzed by ANSYS/LS-DYNA. Finally, the fracture mechanical model of shaped charge blasting is established. The experimental results show that the width of the four main cracks formed after conventional blasting is 0.3 cm, while the width of the cracks in the energy accumulation direction after shaped charge blasting is 1.1 cm and the width of that in the vertical energy accumulation direction is 0.4 cm. The numerical simulation results show that the crushing area after shaped charge blasting is “dumbbell type”, and the area is smaller than that of conventional blasting. However, the cracking area is “spindle type”, and the development of the fracture degree is better than that of conventional blasting. In addition, shaped charge blasting is used to improve the permeability of coal seams. The results show that shaped charge blasting effectively improves the permeability and gas extraction rate of coal seams. American Chemical Society 2022-07-14 /pmc/articles/PMC9330100/ /pubmed/35910146 http://dx.doi.org/10.1021/acsomega.2c02329 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Li, Xiangshang
Si, Kai
He, Tuan
Li, Chunyuan
Dynamic Effect of Shaped Charge Blasting and Its Application in Coal Seam Permeability Enhancement
title Dynamic Effect of Shaped Charge Blasting and Its Application in Coal Seam Permeability Enhancement
title_full Dynamic Effect of Shaped Charge Blasting and Its Application in Coal Seam Permeability Enhancement
title_fullStr Dynamic Effect of Shaped Charge Blasting and Its Application in Coal Seam Permeability Enhancement
title_full_unstemmed Dynamic Effect of Shaped Charge Blasting and Its Application in Coal Seam Permeability Enhancement
title_short Dynamic Effect of Shaped Charge Blasting and Its Application in Coal Seam Permeability Enhancement
title_sort dynamic effect of shaped charge blasting and its application in coal seam permeability enhancement
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9330100/
https://www.ncbi.nlm.nih.gov/pubmed/35910146
http://dx.doi.org/10.1021/acsomega.2c02329
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