Study of crack propagation of bump-prone coal sample
A series of studies about the rule of crack propagation and the process of instability in bump-prone coal sample have been carried out by using scanning electron microscope (SEM), image of surface fracture morphology and the numerical method. The results of three-point bending experiment show that the crack is mainly the tear-type crack under quasi-static loading and can be analyzed with the mode I crack theory. paper deduced the critical length derived from static to dynamic stage based on fracture and damage mechanics theory and introduced the cohesive element. With the cohesive force model of three-point bending notched beam of the sample, the process of the initiation and propagation of crack by us ABAQUS finite element software. This study discussed the energy variety in the whole process, it is coincide with the experimental results.
bump-prone coal crack propagation cohesive force model ABAQUS
Han Zhi-ru Jiyang Yao-dong Zhao Yi-xin Guan Qing-ji
School of Mechanics, Architecture and Civil Engineering, China University of Mining and Technology, School of Mechanics, Architecture and Civil Engineering, China University of Mining and Technology,
国际会议
The 6th International Conference on Mining Science & Technology ICMST 2009(第六届国际矿业科学技术大会)
徐州
英文
1-8
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）