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Numerical Simulation of the Mechanical Behavior of Cobble Rock Mass during Tunneling Using Granular Discrete Element Method
This study mainly discusses the mechanical behavior of a cobble rock mass during tunneling in Chengdu Metro Line 1.A cCobble rock mass could be regarded as ail assembly of discrete particles, with the micro parameters of the rock mass having a significant impact on its macro mechanical behavior. Due to the characteristics of such rock masses, the conventional study method in continuous mediums is no longer available; thus, in the study of the granular discrete element method [basically particle flow code (PFC)] is applied. The results show that when supporting force is relatively low at the tunnel face and is unable to maintain the stability of the face, then large displacement happens in the frontage of the heading, and the stress of the rock mass is loosened. With time lapse, displacement becomes larger and the loosened area of the rock mass extends; then, the tunnel face collapses. With the help of the Chengdu Metro Line 1 project, it proves that PFC is applicable in analyzing the mechanical behavior in a cobble rock mass during tunneling.
Numerical Simulation of the Mechanical Behavior of Cobble Rock Mass during Tunneling Using Granular Discrete Element Method
This study mainly discusses the mechanical behavior of a cobble rock mass during tunneling in Chengdu Metro Line 1.A cCobble rock mass could be regarded as ail assembly of discrete particles, with the micro parameters of the rock mass having a significant impact on its macro mechanical behavior. Due to the characteristics of such rock masses, the conventional study method in continuous mediums is no longer available; thus, in the study of the granular discrete element method [basically particle flow code (PFC)] is applied. The results show that when supporting force is relatively low at the tunnel face and is unable to maintain the stability of the face, then large displacement happens in the frontage of the heading, and the stress of the rock mass is loosened. With time lapse, displacement becomes larger and the loosened area of the rock mass extends; then, the tunnel face collapses. With the help of the Chengdu Metro Line 1 project, it proves that PFC is applicable in analyzing the mechanical behavior in a cobble rock mass during tunneling.
Numerical Simulation of the Mechanical Behavior of Cobble Rock Mass during Tunneling Using Granular Discrete Element Method
Shu, Lei (author) / Qiu, Wenge (author)
2014 International Conference of Logistics Engineering and Management ; 2014 ; Shanghai, China
ICLEM 2014 ; 1375-1380
2014-09-17
Conference paper
Electronic Resource
English
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