Numerical Simulation of Dynamic Response of Surrounding Rock Anchored by NPR Bolt / Cable

被引：1
|
作者：
Guo L.-J. [1 ,2 ]
He M.-C. [1 ,2 ]
Qu D.-J. [3 ]
Tao Z.-G. [1 ,2 ]
机构：
[1] State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology(Beijing), Beijing
[2] School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing), Beijing
[3] Yuan’ an County Liaoyuan Mining Co., Ltd., Yichang
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2022年 / 43卷 / 08期
关键词：
chamber stability; FLAC3D; NPR bolt / cable; rock burst; surrounding rock support;
D O I：
10.12068/j.issn.1005-3026.2022.08.013
中图分类号：
学科分类号：
摘要：
In this paper, a coal mine is used as the research region to study the problems caused by deep mining, such as rock burst, large deformation and failure of conventional bolt/ cable. Based on the large deformation failure mechanism of high in-situ stress soft rock, the FLAC3DPFC3D coupling modeling method was used to carry out the dynamic numerical simulation study of NPR (negative Poisson’s ratio) bolt/ cable for the first time. Numerical models of two support schemes of PR and NPR bolt/ cable were established, and the stress and displacement of the surrounding rock of the chamber and the bolt/ cable under dynamic loads were compared and analyzed. The results show that under the impact load of 25 MPa, 21 of the 25 PR support bolts/ cables failed, the surrounding rock was damaged in a large area, the coupling wall was severely deformed, and the chamber presented inner convex arc-shaped deformation and failure. Under the same conditions, none of the NPR bolts/ cables failed, and the stability of the surrounding rock of the chamber remained good. © 2022 Northeastern University. All rights reserved.
引用
收藏
页码：1159 / 1167
页数：8
相关论文
共 23 条
  • [1] Qi Tai-yue, Numerical simulation of interaction between rock bolt and surrounding rock [ M ], pp. 1-120, (2002)
  • [2] Kang H, Wu Y, Gao F, Et al., Mechanical performances and stress states of rock bolts under varying loading conditions [ J ], Tunnelling & Underground Space Technology Incorporating Trenchless Technology Research, 52, pp. 138-146, (2016)
  • [3] Freeman T J., The behavior of fully bonded rock bolts in the Kielder experimental tunnel [ J ], Tunnels & Tunnelling, 10, 5, pp. 37-40, (1978)
  • [4] Nanda B K., Study of the effect of bolt diameter and washer on damping in layered and jointed structures[J], Journal of Sound & Vibration, 290, 3, pp. 1290-1314, (2006)
  • [5] Wu Y, Gao F, Chen J, Et al., Experimental study on the performance of rock bolts in coal burst-prone mines[ J], Rock Mechanics and Rock Engineering, 52, pp. 3959-3970, (2019)
  • [6] Kang H, Yang J, Gao F, Et al., Experimental study on the mechanical behavior of rock bolts subjected to complex static and dynamic loads [ J ], Rock Mechanics and Rock Engineering, 53, pp. 4993-5004, (2020)
  • [7] Kang H P, Li J Z, Yang J H, Et al., Investigation on the influence of abutment pressure on the stability of rock bolt reinforced roof strata through physical and numerical modeling[J], Rock Mechanics and Rock Engineering, 50, 2, pp. 1-15, (2016)
  • [8] Bobet A, Einstein H H., Tunnel reinforcement with rockbolts [ J ], Tunnelling & Underground Space Technology Incorporating Trenchless Technology Research, 26, 1, pp. 100-123, (2011)
  • [9] Hu T, Hou G Y, Li Z H, Et al., Study on the parameters of roadside support after the cantilever beam of the basic roof with height of fracture zone cut by deep-hole blasting [ J], IOP Conference Series: Earth and Environmental Science, 283, 1, pp. 12038-12048, (2019)
  • [10] Wang Guang-yong, Guo Xiaoy-an, Wang Chao, Et al., Numerical analysis of dynamic response of anchor bolt under blast load of arch waist, Blasting, 32, 2, pp. 33-38, (2015)
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