标题:Numerical simulation of shear modulus's influence on coal pillar's anti-disturbance capacity
作者:Jian, Hao ;Yongkui, Shi ;Yuting, Hou ;Xiaoyuan, Zhan
作者机构:[Jian, Hao ;Yongkui, Shi ;Yuting, Hou ;Xiaoyuan, Zhan ] State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong Univer 更多
通讯作者:Yongkui, Shi
来源:Electronic Journal of Geotechnical Engineering
出版年:2014
卷:19
期:J
页码:2289-2302
摘要:In order to study pillar's dynamic disturbance rule and shear modulus's influence on mechanical response, using an explicit finite difference program FLAC3D, plastic zone's developing rule and of shear stain rate, velocity field, strain energy's distribution rule of a cylinder pillar with a ratio of 2 between height and diameter which was disturbed by dynamic wave were analyzed. Results showed that, disturbed by dynamic wave, shear failure was caused in pillar, particles 's stress variable quantity and stored energy, where was on constraint surface edge, was greatest, and they would develop to plastic zones earliest. Plastic zones would increase with shear modulus becoming greater catastrophically, that is while shear modulus becoming greater than threshold, plastic zones would increase sharply, which indicates there exists a anti-disturbance capacity to given rock mechanics parameters. Dynamic disturbance's mechanical work to pillar would transform into elastic strain energy partly, and others would transform into plastic strain energy. While shear modulus is smaller than threshold, dynamic disturbance's mechanical work to pillar would transform into elastic strain energy mainly, pillar's strain and strain energy would return back to original state after dynamic load disappeared. While shear modulus is greater than threshold, dynamic disturbance's mechanical work to pillar would partly transform into elastic strain energy, and others would transform into plastic strain energy, even if dynamic wave disappeared, pillar's strain could not return back to original state after dynamic load disappeared, and the strain energy would become greater. © 2014 ejge.
收录类别:EI
资源类型:期刊论文
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