scholarly journals Numerical Simulation Analysis on the Supporting Effect of Different Pre-reinforcement Methods in Portal Section of the Shallow Buried Soft Rock Tunnel

2020 ◽  
Vol 455 ◽  
pp. 012175
Author(s):  
Shaohua Shi
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Soft Rock ◽  
Supporting Effect ◽  
Rock Tunnel

Numerical Simulation Analysis on Deformation Mechanism of Shallow-Buried Soft Rock Roadway

2013 ◽  
Vol 734-737 ◽  
pp. 773-776
Author(s):  
Zhi Chao Tian ◽  
Long Hao Dong ◽  
Ye Jiao Liu
Keyword(s):  
Numerical Simulation ◽  
Deformation Mechanism ◽  
Simulation Analysis ◽  
Soft Rock ◽  
Pressure Control ◽  
Calculation Model ◽  
Underground Mines ◽  
Rock Support ◽  
Geological Conditions ◽  
Rock Tunnel

The pressure control of soft-rock and roadway support has been one of the challenges of underground mines. Soft-rock support is very difficult in many places in China and is becoming a kind of main influencing factors in the development and economic of mining community. Numerical simulation research on the deformation mechanism of soft-rock tunnel contributes to the development of soft-rock support theory. The numerical calculation model of shallow buried soft-rock is based on Hongya coalmine; ANSYS is used to analysis the deformation law inward to find out how to control the soft-rock deformation. Hence we can know the main influence in the shallow soft-rock tunnel stability. The results are of great importance to the mines that have similar geological conditions.

scholarly journals Construction Monitoring and Numerical Simulation of Water-Rich Tuff Soft Rock Tunnel

2020 ◽  
Vol 455 ◽  
pp. 012163
Author(s):  
Fangliang Chen ◽  
Kaihua Zeng ◽  
Xuejun Li ◽  
Manqing Xu ◽  
Hongtao Dai
Keyword(s):  
Numerical Simulation ◽  
Soft Rock ◽  
Construction Monitoring ◽  
Rock Tunnel

The Bench Method Numerical Simulation of Soft Rock Tunnel

2013 ◽  
Vol 438-439 ◽  
pp. 949-953
Author(s):  
Hao Bo Fan ◽  
Jin Xing Lai ◽  
Dan Dan Hou
Keyword(s):  
Numerical Simulation ◽  
Measurement Data ◽  
Soft Rock ◽  
Simulation Method ◽  
Internal Force ◽  
Surrounding Rock ◽  
Supporting Structure ◽  
Highway Tunnel ◽  
Tunnel Design ◽  
Rock Tunnel

This paper based on Chaoyang tunnel by bench method excavation, using the finite element numerical simulation method, simulates the surrounding rock displacement of soft rock tunnel and the stress characteristics of supporting structure to get the various stages of tunnel surrounding rock stress, strain and the internal force changes of tunnel supporting structure. After the analyses of the numerical simulation results and field monitoring measurement data, the safety and rationality of the method are determined. The research provides certain reference for highway tunnel design and construction.

Study on Construction of Long Span and Soft Rock Tunnel with Numerical Simulation

2013 ◽  
Vol 438-439 ◽  
pp. 964-967
Author(s):  
Bin Zhu ◽  
Xiao Jing Shi
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Soft Rock ◽  
Tunnel Excavation ◽  
Finite Element Program ◽  
Factors Affecting ◽  
Long Span ◽  
Element Program ◽  
Main Factors ◽  
Rock Tunnel

With characteristics of the long span and soft rock tunnel, this paper analyzes the main factors affecting tunnel stable on the basis of the way of tunnel excavation method. The large finite element program is used in research of a tunnel, with a numerical simulation of two different way, top heading and bench method and double side drift method. From the result of stress field and displacement field of the tunnel , some useful conclusion are obtained, that double side drift method is appropriate for this kind of soft rock tunnel.

scholarly journals Numerical Simulation Analysis of New Steel Sets Used for Roadway Support in Coal Mines

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 606 ◽  
Author(s):  
Qinghai Li ◽  
Jingkai Li ◽  
Jinpeng Zhang ◽  
Changxiang Wang ◽  
Kai Fang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Theoretical Analysis ◽  
Simulation Analysis ◽  
Coal Mines ◽  
Soft Rock ◽  
Observation Point ◽  
Surrounding Rock ◽  
Surrounding Rock Control ◽  
Roadway Support ◽  
Two Sides

The surrounding rock control is a tough issue in the roadway with the swelling soft rock. The steel set is an important material for the control of swelling soft rock roadways. However, traditional steel sets failed to prevent the expansive pressure of the soft rock. Based on traditional steel sets, this paper developed a new steel set through both theoretical analysis and numerical simulation. The results showed that the new steel set was the set with the roof beam 1000 mm from the top of the set and the floor beam 400 mm from the bottom end of the set. The maximum deformations of the roof-floor and two sides of the ventilation roadway controlled by the best-improved set at the observation point were 147 mm and 108 mm, respectively. So, the best-improved set can effectively control the surrounding rock of the ventilation roadway. This provides an effective method for the surrounding rock control in extremely soft rock roadways.

The Study of Numerical Simulation about Roadway Bolting and Reinforcement to Jointed Rock Mass

2012 ◽  
Vol 577 ◽  
pp. 159-162 ◽  
Author(s):  
Zhi Qiang Kang ◽  
Shu Hui Yan ◽  
Qiu Yan
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Soft Rock ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Joint Surface ◽  
Shearing Resistance ◽  
Grouting Reinforcement ◽  
Soft Rock Roadway ◽  
Rock Roadway

Through the mechanical derivation on bolt grouting reinforcement shearing resistance strength of the joint surface, shows that bolt grouting reinforcement focus strengths on the anchor bolt and grouting, and it enhances and elaborates self-supporting ability of rock. Combined with the numerical simulation analysis using the Flac3D software during the jointing soft rock roadway with no supports and protections and bolt grouting reinforcement, we can see that bolt grouting reinforcement has a significant role on improving jointing soft rock roadway force status and limiting roadway rock deformation. Therefore bolt grouting reinforcement is a worthy technology to popularize.

Numerical Simulation Analysis of Underground Integrated Support under High Stress

2012 ◽  
Vol 466-467 ◽  
pp. 1031-1035
Author(s):  
Zhan Jin Li ◽  
Xue Li Zhao ◽  
Yang Zhang
Keyword(s):  
Numerical Simulation ◽  
Coal Mine ◽  
Simulation Analysis ◽  
High Stress ◽  
Simulation Technology ◽  
Support Structure ◽  
Support Mechanism ◽  
Supporting Effect ◽  
Coupling Support

Using numerical simulation technology, coupling support mechanism of anchor-mesh-cable+ bottom-anchor has been analyzed. According to actual engineering of the Fifth Coal Mine of Hemei, the reasonable coupling support structure of anchor-mesh-cable+ bottom-anchor + truss under high stress has been analyzed. It is proposed roadway damage is twist deformation under high stress. By using the reasonable coupling support structure and parameter of anchor-mesh-cable+ bottom-anchor the high stress in underground rock laneway can be controlled and supporting effect is perfect.

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