Strain Rate Effect and Mechanical Constitutive Model of Coal Samples Under Dynamic Load

被引：30

作者：

Gu, Zhoujie ^{[1
,2
]}

Shen, Rongxi ^{[1
,2
]}

Liu, Zhentang ^{[1
,2
]}

Zhou, Xin ^{[1
,2
]}

Li, Xiaoliang ^{[1
,2
]}

Zang, Zesheng ^{[1
,2
]}

Zhang, Li ^{[1
,2
]}

Liu, Wei ^{[1
,2
]}

Wang, Xi ^{[1
,2
]}

机构：

[1] China Univ Min & Technol, Key Lab Gas & Fire Control Coal Mines, Minist Educ, Xuzhou 221116, Peoples R China

[2] China Univ Min & Technol, Sch Safety Engn, Xuzhou 221116, Peoples R China

来源：

NATURAL RESOURCES RESEARCH | 2023年 / 32卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Strain rate; Energy; Failure; Constitutive equation; ENERGY-DISSIPATION; CRACK-PROPAGATION; FAILURE; BEHAVIOR; ROCK; SANDSTONE; EVOLUTION; STRENGTH;

D O I：

10.1007/s11053-023-10247-8

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The failure characteristics and mechanism of coal under dynamic and static loading are a basic problem for studying the mechanism of rock burst. It is also a basic research problem to solve the protection of deep underground engineering. By using the split Hopkinson bar system, the mechanical behavior and energy change of coal were analyzed. The law of stress and energy evolution during coal sample failure were analyzed. Combined with a high-speed camera, the analysis of a coal sample after failure showed that, in the process of dynamic loading, it produced cracks along its axial direction. The critical strain rate in the dynamic damage process of coal samples was also analyzed, and the damage degree of coal samples intensified gradually within a certain range of strain rate. Finally, a dynamic mechanical constitutive model was established by considering the influence of strain rate, and the damage changes of coal samples were analyzed. The research results provide a reference basis for further revealing the mechanism of rock burst and preventing coal rock dynamic disaster.

引用

页码：2769 / 2785

页数：17

共 47 条

[1] Experimental and numerical investigation of crack propagation and dynamic properties of rock in SHPB indirect tension test [J].

Ai, Dihao ;

Zhao, Yuechao ;

Wang, Qifei ;

Li, Chengwu .

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 2019, 126 :135-146

[2] Topological derivative-based topology optimization of structures subject to Drucker-Prager stress constraints [J].

Amstutz, S. ;

Novotny, A. A. ;

de Souza Neto, E. A. .

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 2012, 233 :123-136

[3] Acoustic emission response and evolution of precracked coal in the meta-instability stage under graded loading [J].

Ding, Zeng ;

Feng, Xiaojun ;

Wang, Enyuan ;

Wei, Qilei ;

Zhao, Xue ;

Hu, Qinjing .

ENGINEERING GEOLOGY, 2023, 312

[4] Some Challenges of Deep Mining [J].

Fairhurst, Charles .

ENGINEERING, 2017, 3 (04) :527-537

[5] Experimental and numerical study of failure behavior and mechanism of coal under dynamic compressive loads [J].

Feng, Junjun ;

Wang, Enyuan ;

Huang, Qisong ;

Ding, Houcheng ;

Zhang, Xiangyang .

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, 2020, 30 (05) :613-621

[6] Energy dissipation rate: An indicator of coal deformation and failure under static and dynamic compressive loads [J].

Feng Junjun ;

Wang Enyuan ;

Chen Xia ;

Ding Houcheng .

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, 2018, 28 (03) :397-406

[7] Investigation on energy dissipation and its mechanism of coal under dynamic loads [J].

Feng, Junjun ;

Wang, Enyuan ;

Shen, Rongxi ;

Chen, Liang ;

Li, Xuelong ;

Xu, Zhaoyong .

GEOMECHANICS AND ENGINEERING, 2016, 11 (05) :657-670

[8] "Double Peak" of Dynamic Strengths and Acoustic Emission Responses of Coal Masses Under Dynamic Loading [J].

Feng, Xiaojun ;

Ding, Zeng ;

Ju, Yunqiang ;

Zhang, Qiming ;

Ali, Muhammad .

NATURAL RESOURCES RESEARCH, 2022, 31 (03) :1705-1720

[9] Dynamic Characteristics of Coal under Triaxial Constraints Based on the Split-Hopkinson Pressure Bar Test System [J].

Gu, Zhoujie ;

Shen, Rongxi ;

Liu, Zhentang ;

Zhao, Enlai ;

Chen, Hailiang ;

Yuan, Zichen ;

Chu, Xiaomeng ;

Tian, Jiawei .

NATURAL RESOURCES RESEARCH, 2023, 32 (02) :587-601

[10] Dynamic tensile behaviour and crack propagation of coal under coupled static-dynamic loading [J].

Hao, Xianjie ;

Du, Weisheng ;

Zhao, Yixin ;

Sun, Zhuowen ;

Zhang, Qian ;

Wang, Shaohua ;

Qiao, Haiqing .

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, 2020, 30 (05) :659-668

← 1 2 3 4 5 →