Rock support design based on the concept of pressure arch

2006 ◽  
Vol 43 (7) ◽  
pp. 1083-1090 ◽  
Author(s):  
C. Chunlin Li
Keyword(s):  
Rock Support ◽  
Support Design

scholarly journals Previous classification of rock mass surrounding underground excavations and rock support design using block models

2021 ◽  
Vol 74 (4) ◽  
pp. 511-519
Author(s):  
Iure Borges de Moura Aquino ◽  
Rodolfo Renó ◽  
Roberto Mentzingen Rolo ◽  
André Cezar Zingano ◽  
Hernani Mota de Lima
Keyword(s):  
Rock Mass ◽  
Underground Excavations ◽  
Rock Support ◽  
Support Design ◽  
Block Models

scholarly journals Rock support in hydropower projects of Nepal: case studies

2006 ◽  
Vol 34 ◽  
pp. 29-38
Author(s):  
Subas Chandra Sunuwar
Keyword(s):  
Rock Mass ◽  
Large Diameter ◽  
Design Guidelines ◽  
Rock Mass Classification ◽  
Classification Systems ◽  
Rating Systems ◽  
Rock Support ◽  
Support Design ◽  
Tunnel Support ◽  
Mass Classification

The principal objective of rock support is to assist the rock mass to support itself. One common example is where the rock support system (e.g. rock bolts and shotcrete) actually becomes integrated with the rock mass. Rock support strengthens the rock mass surrounding an excavation by creating a reinforced zone, which maintains the integrity of the excavated surface, possesses sufficient flexibility to allow for the redistribution of stresses around the excavation, and has enough stiffness to minimise the dilation (opening) of discontinuities. Rock mass classification systems are used worldwide as a basis for tunnel support design. The Q and Rock Mass Rating systems have been extensively applied in rock support design on most of the hydropower projects in Nepal. Generic design guidelines based on rock mass classification systems cannot provide suitable rock support for every site. Therefore some modifications are necessary to suite the site-specific ground conditions including local rock mass and geological hazards. There are relatively few tunnels excavated in the tectonically active Nepal Himalaya. Large diameter tunnels in Nepal are commonly lined with concrete whereas recently smaller-diameter tunnels are either shotcrete-lined or left unsupported. "Leaky" lining has been used in most of the projects to avoid the heavy reinforcement needed to withstand the occasional very high external water pressures.

Research on an IDSS for rock support design in Jinchuan mine

2018 ◽  
pp. 503-508
Author(s):  
Liu Tongyou ◽  
Zhou Chengpu ◽  
Gao Qian ◽  
Ma Nianjie
Keyword(s):  
Rock Support ◽  
Support Design

scholarly journals Stability Analysis and Design of Rock Support for Tunnel and cavern of Kathmandu University Geo-lab

2018 ◽  
Vol 13 (1) ◽  
pp. 1-19
Author(s):  
Shyam Sundar Khadka ◽  
Ramesh Kumar Maskey
Keyword(s):  
Rock Mass ◽  
Stability Analysis ◽  
Numerical Study ◽  
Support Pressure ◽  
Underground Structures ◽  
Rock Support ◽  
Support Design ◽  
Element Analysis ◽  
Analysis And Design ◽  
Weak Rock Mass

 This study focuses on the design and stability analysis of underground structures in the Lesser Himalayan Region of Nepal. The rock support design for such opening depends upon the rock mass strength. In this study a proposed Kathmandu University Geo-Lab tunnel and cavern, which passes through weak rock mass conditions, was used as a case study. Existing empirical and analytical methods for the stability of the proposed tunnel and cavern are used for the estimation of support pressure and design support. A detailed numerical study was carried out in 2D finite element analysis to design the tunnel in such region. The results of analysis showed that the support pressure and deformation can be predicted very well from the numerical analysis.Kathmandu University Journal of Science, Engineering and TechnologyVol. 13, No. 1, 2017, page: 1-19

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