Experimental and Numerical Investigation of Hard Rock Breakage by Indenter Impact
To investigate the effect of indenter shape, impact energy, and impact velocity on the rock breakage performance, a test device for rock fragmentation by indenter impact was developed to obtain the rock breakage volume, depth, and area under different impact conditions. By comparing the rock breakag...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/2747830 |
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| _version_ | 1832566208205946880 |
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| author | Hongxiang Jiang Zhiyuan Cai Ouguo Wang Deguang Meng |
| author_facet | Hongxiang Jiang Zhiyuan Cai Ouguo Wang Deguang Meng |
| author_sort | Hongxiang Jiang |
| collection | DOAJ |
| description | To investigate the effect of indenter shape, impact energy, and impact velocity on the rock breakage performance, a test device for rock fragmentation by indenter impact was developed to obtain the rock breakage volume, depth, and area under different impact conditions. By comparing the rock breakage volume, depth, area, and specific energy consumption, the results show that indenter shape has a greater influence on the rock breakage performance than that of the impact velocity with the same impact energy, and impact energy plays a decisive role in rock breakage performance with an identical indenter shape and impact velocity. For the lowest to highest specific energy consumption, the order of indenter shape is cusp-conical, warhead, hemispherical, spherical-arc, and flat-top under the same impact energy and velocity, but the cusp-conical indenter is damaged after several impacts. The rock breakage volume, depth, and area all increase with the increase in impact energy, but the effect of the impact velocity could be ignored under the same impact energy. In addition, the rock breakage features of the numerical simulation and experiments are similar, which show that the crushing zone close to the indenter impact point is mainly caused by the high compressive stress, and then radial cracks are caused by the accumulative energy release. The findings of this study will contribute to progress in the performance and efficiency for percussive rock drilling. |
| format | Article |
| id | doaj-art-5cc68bb6301241ab98d7b585b707e945 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-5cc68bb6301241ab98d7b585b707e9452025-02-03T01:04:42ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/27478302747830Experimental and Numerical Investigation of Hard Rock Breakage by Indenter ImpactHongxiang Jiang0Zhiyuan Cai1Ouguo Wang2Deguang Meng3School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaTo investigate the effect of indenter shape, impact energy, and impact velocity on the rock breakage performance, a test device for rock fragmentation by indenter impact was developed to obtain the rock breakage volume, depth, and area under different impact conditions. By comparing the rock breakage volume, depth, area, and specific energy consumption, the results show that indenter shape has a greater influence on the rock breakage performance than that of the impact velocity with the same impact energy, and impact energy plays a decisive role in rock breakage performance with an identical indenter shape and impact velocity. For the lowest to highest specific energy consumption, the order of indenter shape is cusp-conical, warhead, hemispherical, spherical-arc, and flat-top under the same impact energy and velocity, but the cusp-conical indenter is damaged after several impacts. The rock breakage volume, depth, and area all increase with the increase in impact energy, but the effect of the impact velocity could be ignored under the same impact energy. In addition, the rock breakage features of the numerical simulation and experiments are similar, which show that the crushing zone close to the indenter impact point is mainly caused by the high compressive stress, and then radial cracks are caused by the accumulative energy release. The findings of this study will contribute to progress in the performance and efficiency for percussive rock drilling.http://dx.doi.org/10.1155/2020/2747830 |
| spellingShingle | Hongxiang Jiang Zhiyuan Cai Ouguo Wang Deguang Meng Experimental and Numerical Investigation of Hard Rock Breakage by Indenter Impact Shock and Vibration |
| title | Experimental and Numerical Investigation of Hard Rock Breakage by Indenter Impact |
| title_full | Experimental and Numerical Investigation of Hard Rock Breakage by Indenter Impact |
| title_fullStr | Experimental and Numerical Investigation of Hard Rock Breakage by Indenter Impact |
| title_full_unstemmed | Experimental and Numerical Investigation of Hard Rock Breakage by Indenter Impact |
| title_short | Experimental and Numerical Investigation of Hard Rock Breakage by Indenter Impact |
| title_sort | experimental and numerical investigation of hard rock breakage by indenter impact |
| url | http://dx.doi.org/10.1155/2020/2747830 |
| work_keys_str_mv | AT hongxiangjiang experimentalandnumericalinvestigationofhardrockbreakagebyindenterimpact AT zhiyuancai experimentalandnumericalinvestigationofhardrockbreakagebyindenterimpact AT ouguowang experimentalandnumericalinvestigationofhardrockbreakagebyindenterimpact AT deguangmeng experimentalandnumericalinvestigationofhardrockbreakagebyindenterimpact |