Fractal characteristics of cracks and fragments generated in unloading rockburst tests
True triaxial rockburst experiments with four different unloading rates were performed on four prism specimens of granite sampled from Beishan, China. The damage evolution in the rockburst test was investigated from two aspects including fracture surface crack and fragment characteristics. The scann...
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| Veröffentlicht in: | International journal of mining science and technology 2014-11, Vol.24 (6), p.819-823 |
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| container_title | International journal of mining science and technology |
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| creator | Li, Dejian Zhao, Fei Zheng, Maojiong |
| description | True triaxial rockburst experiments with four different unloading rates were performed on four prism specimens of granite sampled from Beishan, China. The damage evolution in the rockburst test was investigated from two aspects including fracture surface crack and fragment characteristics. The scanning electron microscopy was used to observe the micro crack information on fragment surface. Combing binarization and box counting dimensions, the fractal dimensions of cracks were obtained. Meanwhile, the fragments were collected and a sieving experiment was conducted. We weighed the fragments qualities, counted the amount of fragments and measured the fragments length, width and thickness. Utilizing four methods to calculate damage fractal dimensions of fragments, the trend of fractal value changing with unloading rates can be roughly described. It can be concluded from these experiments that the fractal dimension either for crack or for fragment holds a decreasing trend with the decreasing unloading rate, indicating a reduction of damage level. |
| doi_str_mv | 10.1016/j.ijmst.2014.10.014 |
| format | Article |
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The damage evolution in the rockburst test was investigated from two aspects including fracture surface crack and fragment characteristics. The scanning electron microscopy was used to observe the micro crack information on fragment surface. Combing binarization and box counting dimensions, the fractal dimensions of cracks were obtained. Meanwhile, the fragments were collected and a sieving experiment was conducted. We weighed the fragments qualities, counted the amount of fragments and measured the fragments length, width and thickness. Utilizing four methods to calculate damage fractal dimensions of fragments, the trend of fractal value changing with unloading rates can be roughly described. It can be concluded from these experiments that the fractal dimension either for crack or for fragment holds a decreasing trend with the decreasing unloading rate, indicating a reduction of damage level.</description><identifier>ISSN: 2095-2686</identifier><identifier>DOI: 10.1016/j.ijmst.2014.10.014</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>China ; Damage ; Fractal analysis ; Fractal dimension ; Fractals ; Fracture mechanics ; Fragments ; Grain distribution ; Micro crack ; Reduction ; Rockbursts ; Trends ; Unloading rockburst test ; 分形特征 ; 分形维数 ; 卸载 ; 岩爆 ; 扫描电子显微 ; 表面裂纹 ; 裂缝 ; 试验</subject><ispartof>International journal of mining science and technology, 2014-11, Vol.24 (6), p.819-823</ispartof><rights>2014</rights><rights>Copyright © Wanfang Data Co. Ltd. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c399t-bced0becd586c9a31dad08de3579bcf425862e8713b2dd074ee17e373d66923b3</citedby><cites>FETCH-LOGICAL-c399t-bced0becd586c9a31dad08de3579bcf425862e8713b2dd074ee17e373d66923b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/85399B/85399B.jpg</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.ijmst.2014.10.014$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Li, Dejian</creatorcontrib><creatorcontrib>Zhao, Fei</creatorcontrib><creatorcontrib>Zheng, Maojiong</creatorcontrib><title>Fractal characteristics of cracks and fragments generated in unloading rockburst tests</title><title>International journal of mining science and technology</title><addtitle>Mining Science and Technology</addtitle><description>True triaxial rockburst experiments with four different unloading rates were performed on four prism specimens of granite sampled from Beishan, China. The damage evolution in the rockburst test was investigated from two aspects including fracture surface crack and fragment characteristics. The scanning electron microscopy was used to observe the micro crack information on fragment surface. Combing binarization and box counting dimensions, the fractal dimensions of cracks were obtained. Meanwhile, the fragments were collected and a sieving experiment was conducted. We weighed the fragments qualities, counted the amount of fragments and measured the fragments length, width and thickness. Utilizing four methods to calculate damage fractal dimensions of fragments, the trend of fractal value changing with unloading rates can be roughly described. It can be concluded from these experiments that the fractal dimension either for crack or for fragment holds a decreasing trend with the decreasing unloading rate, indicating a reduction of damage level.</description><subject>China</subject><subject>Damage</subject><subject>Fractal analysis</subject><subject>Fractal dimension</subject><subject>Fractals</subject><subject>Fracture mechanics</subject><subject>Fragments</subject><subject>Grain distribution</subject><subject>Micro crack</subject><subject>Reduction</subject><subject>Rockbursts</subject><subject>Trends</subject><subject>Unloading rockburst test</subject><subject>分形特征</subject><subject>分形维数</subject><subject>卸载</subject><subject>岩爆</subject><subject>扫描电子显微</subject><subject>表面裂纹</subject><subject>裂缝</subject><subject>试验</subject><issn>2095-2686</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqFUD1PwzAQzQASVeEXsFhMSKjFjhMnGRgQ4kuqxAKslmNfUqepXWwHKL8ehyBWbriznt6953tJckrwkmDCLrul7rY-LFNMsogs4zhIZimu8kXKSnaUnHjf4ViszMo8nSWvd07IIHok12J8gdM-aOmRbZCMwMYjYRRqnGi3YIJHLRhwIoBC2qDB9FYobVrkrNzUg_MBBfDBHyeHjeg9nPzOefJyd_t887BYPd0_3lyvFpJWVVjUEhSuQaq8ZLISlCihcKmA5kVVyyZLI55CWRBap0rhIgMgBdCCKsaqlNZ0nlxMuh_CNMK0vLODM9GRf7Wbvfr8rDmMWWAWW2SfT-yds29D_Cffai-h74UBO3hOomo0K8s8UulElc5676DhO6e3wu05wXyMmnf8J2o-yo_gZHA1bUG8-V2D415qMPFK7UAGrqz-Z__s13VtTfsWg_2zZYwWBckyQr8B_GaXUA</recordid><startdate>20141101</startdate><enddate>20141101</enddate><creator>Li, Dejian</creator><creator>Zhao, Fei</creator><creator>Zheng, Maojiong</creator><general>Elsevier B.V</general><general>State Key Laboratory of GeoMechanics and Deep Underground Engineering, Beijing 100083, China</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope></search><sort><creationdate>20141101</creationdate><title>Fractal characteristics of cracks and fragments generated in unloading rockburst tests</title><author>Li, Dejian ; Zhao, Fei ; Zheng, Maojiong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c399t-bced0becd586c9a31dad08de3579bcf425862e8713b2dd074ee17e373d66923b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>China</topic><topic>Damage</topic><topic>Fractal analysis</topic><topic>Fractal dimension</topic><topic>Fractals</topic><topic>Fracture mechanics</topic><topic>Fragments</topic><topic>Grain distribution</topic><topic>Micro crack</topic><topic>Reduction</topic><topic>Rockbursts</topic><topic>Trends</topic><topic>Unloading rockburst test</topic><topic>分形特征</topic><topic>分形维数</topic><topic>卸载</topic><topic>岩爆</topic><topic>扫描电子显微</topic><topic>表面裂纹</topic><topic>裂缝</topic><topic>试验</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Dejian</creatorcontrib><creatorcontrib>Zhao, Fei</creatorcontrib><creatorcontrib>Zheng, Maojiong</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Wanfang Data Journals - Hong Kong</collection><collection>WANFANG Data Centre</collection><collection>Wanfang Data Journals</collection><collection>万方数据期刊 - 香港版</collection><collection>China Online Journals (COJ)</collection><collection>China Online Journals (COJ)</collection><jtitle>International journal of mining science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Dejian</au><au>Zhao, Fei</au><au>Zheng, Maojiong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fractal characteristics of cracks and fragments generated in unloading rockburst tests</atitle><jtitle>International journal of mining science and technology</jtitle><addtitle>Mining Science and Technology</addtitle><date>2014-11-01</date><risdate>2014</risdate><volume>24</volume><issue>6</issue><spage>819</spage><epage>823</epage><pages>819-823</pages><issn>2095-2686</issn><abstract>True triaxial rockburst experiments with four different unloading rates were performed on four prism specimens of granite sampled from Beishan, China. The damage evolution in the rockburst test was investigated from two aspects including fracture surface crack and fragment characteristics. The scanning electron microscopy was used to observe the micro crack information on fragment surface. Combing binarization and box counting dimensions, the fractal dimensions of cracks were obtained. Meanwhile, the fragments were collected and a sieving experiment was conducted. We weighed the fragments qualities, counted the amount of fragments and measured the fragments length, width and thickness. Utilizing four methods to calculate damage fractal dimensions of fragments, the trend of fractal value changing with unloading rates can be roughly described. It can be concluded from these experiments that the fractal dimension either for crack or for fragment holds a decreasing trend with the decreasing unloading rate, indicating a reduction of damage level.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.ijmst.2014.10.014</doi><tpages>5</tpages></addata></record> |
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| ispartof | International journal of mining science and technology, 2014-11, Vol.24 (6), p.819-823 |
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| subjects | China Damage Fractal analysis Fractal dimension Fractals Fracture mechanics Fragments Grain distribution Micro crack Reduction Rockbursts Trends Unloading rockburst test 分形特征 分形维数 卸载 岩爆 扫描电子显微 表面裂纹 裂缝 试验 |
| title | Fractal characteristics of cracks and fragments generated in unloading rockburst tests |
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