Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock
The rock-breaking mechanism and effect of confined blasting were analysed by blasting and impact dynamic mechanics, fluid dynamic mechanics, fracture mechanics as well as blasting experiment. The results showed that the fracturing of surrounding rock in confined blasting condition is the result of c...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-09-01
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| Series: | International Journal of Mining Science and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095268617305797 |
| _version_ | 1818931916436406272 |
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| author | Liu Changyou Yang Jingxuan Yu Bin |
| author_facet | Liu Changyou Yang Jingxuan Yu Bin |
| author_sort | Liu Changyou |
| collection | DOAJ |
| description | The rock-breaking mechanism and effect of confined blasting were analysed by blasting and impact dynamic mechanics, fluid dynamic mechanics, fracture mechanics as well as blasting experiment. The results showed that the fracturing of surrounding rock in confined blasting condition is the result of coaction of rock pre-cracking by shock wave and stress wave and the continuing expanding crack-enhancement of confined medium, and the model of crack development of borehole surrounding rock in confined blasting condition was established. This study acquired the damage range of surrounding rock under the action of shock wave and stress wave, as well as the crack development characteristics of surrounding rock after the wedge-in confined medium into the crack space. Deep-hole confined blasting experiment on large rock showed that the high-efficient utilisation of in-hole explosive was achieved and the safety of rock blasting operation was ensured. Safe static rock-breaking under the action of high-efficient explosive blasting was achieved as well as the unification of super dynamic load of explosive blasting and static rock-breaking of water medium. Keywords: Shock wave, Confined medium, Water-wedge action, Crack development, Confined blasting |
| first_indexed | 2024-12-20T04:24:11Z |
| format | Article |
| id | doaj.art-894a9e2f99024f8287a09a8195541317 |
| institution | Directory Open Access Journal |
| issn | 2095-2686 |
| language | English |
| last_indexed | 2024-12-20T04:24:11Z |
| publishDate | 2017-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Mining Science and Technology |
| spelling | doaj.art-894a9e2f99024f8287a09a81955413172022-12-21T19:53:33ZengElsevierInternational Journal of Mining Science and Technology2095-26862017-09-01275795801Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rockLiu Changyou0Yang Jingxuan1Yu Bin2School of Mines, China University of Mining & Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining & Technology, Xuzhou 221116, China; Corresponding author.Datong Coal Mine Group Company, Datong 037003, ChinaThe rock-breaking mechanism and effect of confined blasting were analysed by blasting and impact dynamic mechanics, fluid dynamic mechanics, fracture mechanics as well as blasting experiment. The results showed that the fracturing of surrounding rock in confined blasting condition is the result of coaction of rock pre-cracking by shock wave and stress wave and the continuing expanding crack-enhancement of confined medium, and the model of crack development of borehole surrounding rock in confined blasting condition was established. This study acquired the damage range of surrounding rock under the action of shock wave and stress wave, as well as the crack development characteristics of surrounding rock after the wedge-in confined medium into the crack space. Deep-hole confined blasting experiment on large rock showed that the high-efficient utilisation of in-hole explosive was achieved and the safety of rock blasting operation was ensured. Safe static rock-breaking under the action of high-efficient explosive blasting was achieved as well as the unification of super dynamic load of explosive blasting and static rock-breaking of water medium. Keywords: Shock wave, Confined medium, Water-wedge action, Crack development, Confined blastinghttp://www.sciencedirect.com/science/article/pii/S2095268617305797 |
| spellingShingle | Liu Changyou Yang Jingxuan Yu Bin Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock International Journal of Mining Science and Technology |
| title | Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock |
| title_full | Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock |
| title_fullStr | Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock |
| title_full_unstemmed | Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock |
| title_short | Rock-breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock |
| title_sort | rock breaking mechanism and experimental analysis of confined blasting of borehole surrounding rock |
| url | http://www.sciencedirect.com/science/article/pii/S2095268617305797 |
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