Results 251 to 260 of about 18,688 (295)

Analysis and evaluation on stability of the tunnel surrounding rock

2011 International Conference on Electric Technology and Civil Engineering (ICETCE), 2011
One tunnel located in the north east of Ping Ding Shan city be used to put 5 steel pipes for transporting cinder of the power plant in the city. The tunnel region is just the mining coal subsidence area., so the surrounding rock stability of the tunnel is complicated problem because of strata displacement and subsidence because of mining coal.
null Yao Jinjie, null Wang Guizhu
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Face Stability and Reinforcement of the Tunnel in Weak Surrounding Rock

Geotechnical and Geological Engineering, 2020
According to the influence of surrounding rock levels and buried depths on the face stability of the tunnel. A stability analysis model of the full-face tunnel with weak surrounding rock is established based on the finite element method (FEM) and the Drucker-Prager yield criterion.
Xuxin Chen, Ping He, Dumin Yan, Aoxiang Nie   +3 more
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Influence of Rock Burst and Other Disasters on Stability of Surrounding Rock of Roadway

Geotechnical and Geological Engineering, 2017
In this paper, selecting 3 levels and 6 factors with an orthogonal test approach to investigate the stability of roadway surrounding rock under dynamic disturbance. The intuitive analysis results show that the main factors that affect the roadway deformation is period, followed by the location, lateral pressure coefficient, amplitude and buried depth ...
Yushun Yang, Sijiang Wei, Dongming Zhang
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Sensitivity analysis of rock mechanics parameters in stability of tunnel surrounding rock

Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2019
In this paper, we adopted the orthogonal numerical test method to study the effect of rock mass parameters on horizontal convergence, roof-to-floor convergence and plastic zone factor with select s...
Yushun Yang, Dongming Zhang, Xi Chen, Yong Zhao   +3 more
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Stability Analysis of Surrounding Rock Based on QGA-SVM

Advanced Materials Research, 2014
In order to analyze the stability of surrounding rock accurately and effectively, a rock classification method based on QGA (quantum genetic algorithm)-SVM (support vector machine) is put forward. QGA was used for global search in the solution space to optimize the kernel function parameters of SVM.
Fu Dong Xie, Wei Min Yang, Dao Hong Qiu, Yi Li   +3 more
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Optimization of monitoring the stability of surrounding rock in a metal mine

International Journal of Minerals, Metallurgy and Materials, 2009
Through analyzing the failure mechanics of rock under blasting effect, the optical fiber sensing system was used to monitor the strain of surrounding rock under blasting effect. Combined with practical exploration, the stability of surrounding rock was computed by numerical simulation using the blasting wave obtained from the site.
Bo Song, Min Zhong, Xin Dong, Pei-fu Wang   +3 more
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Stability of NATM tunnel faces in soft surrounding rocks

Computers and Geotechnics, 2018
Abstract NATM (new Austrian tunneling method) tunnel construction is unable to proceed under instable states of working face, so the stability of working face has been regarded as a key scientific issue. In this paper, a horizontal slice method based on the limit equilibrium analysis theory is employed to establish a model for the tunnel face ...
Zhiqiang Zhang, Xiaoquan Shi, Bo Wang, Huayun Li   +3 more
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Study of Stability Assessment Method for Deep Surrounding Rock

Applied Mechanics and Materials, 2014
According to the three characteristics of deep surrounding rock: high stress, high temperature and high seepage, the three field coupling control equation of temperature-stress-seepage are established, the finite element method is used for solution.
Zhi Tong Mao, Yan Peng Zhu
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A Study on the Influence by Karst on the Stability of Surrounding Rock in Neighborhood Tunnel

Advanced Materials Research, 2012
Based on the Shuangbei tunnel, this paper studied influences on the deformation and stress of surrounding rock, regarding different Karst sizes and locations in such a neighborhood tunnel. The study indicates that variations of size and distance of the karst have prominent influence on the vertical displacements of vault and right side-wall in the ...
Cheng Wang, Xiao Qiang Pi
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Stability Analysis of Surrounding Rocks of Underground Powerhouse in a Hydropower Station

Advanced Materials Research, 2014
The underground powerhouse of a hydropower station is a typical large-span and high side wall cavern group. The stability analysis of high side wall and the rock between caverns is key for cavern design. Based on the process of excavation and anchorage of underground caverns, FLAC3D numerical modeling technique is used to dynamically analyze the ...
Jun Hu, Xiao Peng Yu
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