Investigations of Damage Characteristics in Rock Material Subjected to the Joint Effect of Cyclic Loading and Impact
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作者:
Chen, Yanlong
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China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Chen, Yanlong
[1
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Wu, Haoshuai
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China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Wu, Haoshuai
[1
]
Pu, Hai
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机构:
China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Xinjiang Inst Engn, Coll Min Engn & Geol, Urumqi 830091, Peoples R ChinaChina Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Pu, Hai
[1
,2
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Zhang, Kai
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China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Zhang, Kai
[1
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Ju, Feng
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China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Ju, Feng
[1
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Wu, Yu
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China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Wu, Yu
[1
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Liu, Jiangfeng
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China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R ChinaChina Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
Liu, Jiangfeng
[1
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机构:
[1] China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China
[2] Xinjiang Inst Engn, Coll Min Engn & Geol, Urumqi 830091, Peoples R China
Investigation of the damage characteristics of rock material under the combined effect of cyclic load and impact load is extremely crucial for many mining engineering applications. Based on energy dissipation theory, we considered factors such as circulation times, the cyclic stress of a uniaxial cyclic load test, and the impact pressure (strain rate) of a split Hopkinson pressure bar (SHPB) test, studying the damage mechanism of red sandstone under the combined action of a uniaxial cyclic and impact loads. We found that when the load stress is 60%, 70%, and 80% of the uniaxial compressive strength (UCS) of red sandstone, the stress can still promote the development of microcracks and the generation of new cracks in the rock, increasing the inner damage of the rock so that it reduces the rock strength. As the cyclic time increases, the energy dissipation ratio presented a trend of decreasing dramatically and then maintaining basically no change, and the peak strain and the damage variable of the rock both increased first and then tended to remain relatively constant. The damage variable of the rock specimen under the combined action of the uniaxial cyclic loading and impact load had a significant corresponding relationship with the initial damage. As the rock specimen initial damage increases, the damage variable and the peak stress of the rock specimen both decreases almost linearly with initial damage. Meanwhile, the average particle diameter of the rock specimen after breakage gradually increased, showing a positively correlated tendency. The ratio between the fragment quality of the bigger particle diameter in the total rock specimen quality gradually increased. Under the conditions of the same initial damage, a higher impact pressure resulted in smaller rock fragment average particle diameters.
机构:
China Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
China Univ Min & Technol, Key Lab Deep Coal Resource Min, Minist Educ, Xuzhou 221116, Jiangsu, Peoples R ChinaChina Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
Xie, Hongxin
Li, Xuehua
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China Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
China Univ Min & Technol, Key Lab Deep Coal Resource Min, Minist Educ, Xuzhou 221116, Jiangsu, Peoples R ChinaChina Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
Li, Xuehua
Shan, Changhao
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机构:
China Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
China Univ Min & Technol, Key Lab Deep Coal Resource Min, Minist Educ, Xuzhou 221116, Jiangsu, Peoples R ChinaChina Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
Shan, Changhao
Xia, Ze
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机构:
China Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
China Univ Min & Technol, Key Lab Deep Coal Resource Min, Minist Educ, Xuzhou 221116, Jiangsu, Peoples R ChinaChina Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
Xia, Ze
Yu, Liqiang
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机构:
China Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
China Univ Min & Technol, Key Lab Deep Coal Resource Min, Minist Educ, Xuzhou 221116, Jiangsu, Peoples R ChinaChina Univ Min & Technol, Sch Mines, 1 Univ Rd, Xuzhou 221116, Jiangsu, Peoples R China
机构:
Univ Adelaide, Sch Civil Environm & Min Engn, Adelaide, SA 5005, AustraliaUniv Adelaide, Sch Civil Environm & Min Engn, Adelaide, SA 5005, Australia
Shirani Faradonbeh, Roohollah
Taheri, Abbas
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Univ Adelaide, Sch Civil Environm & Min Engn, Adelaide, SA 5005, AustraliaUniv Adelaide, Sch Civil Environm & Min Engn, Adelaide, SA 5005, Australia
Taheri, Abbas
Karakus, Murat
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Univ Adelaide, Sch Civil Environm & Min Engn, Adelaide, SA 5005, AustraliaUniv Adelaide, Sch Civil Environm & Min Engn, Adelaide, SA 5005, Australia
机构:
Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R ChinaUniv South China, Sch Civil Engn, Hengyang 421001, Peoples R China
Sun, Bing
Yang, Haowei
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Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R ChinaUniv South China, Sch Civil Engn, Hengyang 421001, Peoples R China
Yang, Haowei
Fan, Junwei
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Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R ChinaUniv South China, Sch Civil Engn, Hengyang 421001, Peoples R China
Fan, Junwei
Liu, Xiling
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机构:
Cent South Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R ChinaUniv South China, Sch Civil Engn, Hengyang 421001, Peoples R China
Liu, Xiling
Zeng, Sheng
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机构:
Univ South China, Sch Resources Environm & Safety Engn, Hengyang 421001, Peoples R ChinaUniv South China, Sch Civil Engn, Hengyang 421001, Peoples R China