Research on Rock Bolt Reinforcement and Integral Lined Tunnels

1967 ◽  
Author(s):  
Richard E. Goodman
Keyword(s):  
Rock Bolt ◽  
Bolt Reinforcement

Deep-buried rock bolt reinforcement for wide-span junctions in the Aikhal Mine

2020 ◽  
pp. 71-74
Author(s):  
M. V. Lysenko ◽  
◽  
A. S. Pozolotin ◽  
A. V. Aikin ◽  
O. A. Nikolenko ◽  
...  
Keyword(s):  
Rock Bolt ◽  
Bolt Reinforcement

Study on Rock Bolt Reinforcement for a Gravity Dam Foundation

2011 ◽  
Vol 45 (1) ◽  
pp. 75-87 ◽  
Author(s):  
S. H. Chen ◽  
Z. M. Yang ◽  
W. M. Wang ◽  
I. Shahrour
Keyword(s):  
Rock Bolt ◽  
Gravity Dam ◽  
Dam Foundation ◽  
Bolt Reinforcement

scholarly journals Improving the Numerical Modelling of In-Situ Rock Bolts Using Axial and Bending Strain Data from Instrumented Bolts

2022 ◽  
Author(s):  
Prasoon Singh ◽  
Hyongdoo Jang ◽  
A. J. S. Sam Spearing
Keyword(s):  
Numerical Modelling ◽  
Rock Bolt ◽  
Sensitivity Analyses ◽  
Rock Bolts ◽  
In Situ Data ◽  
Bending Strain ◽  
Data Source ◽  
Bolt Reinforcement ◽  
Reinforcement Design

AbstractNumerical modelling has become an important tool in the underground rock bolt reinforcement designing process. Numerical modelling provides the advantage of easily and quickly simulating complex underground geometries and mechanisms with sensitivity analyses. However, a numerical model needs to be calibrated using mathematical solutions, lab testing or with actual in-situ observations and measurements (which is the preferred method) before its results can be quantitatively applied to reinforcement design. Instrumented rock bolts provide a useful data source for calibrating in-situ rock bolt models. In this work, procedures have been presented to identify and determine the orientation of structures in the rock mass based on the strains on the instrumented rock bolts. A method to calibrate the rock bolt model with in-situ data is also presented. The results of the presented procedures have been validated with laboratory tests and numerical modelling. The procedures have been applied to create and calibrate an in-situ rock bolt model in FLAC3D and the results are validated using in-situ data.

scholarly journals Analysis of Reinforcement System (Rock Bolt and Shotcrete) Effect on The Pillars Strength in Underground Mining Using Physical Models Testing in Laboratory

2021 ◽  
Vol 9 (1) ◽  
pp. 73-87
Author(s):  
La Ode Dzakir ◽  
Made Astawa Rai ◽  
Nuhindro Priagung Widodo
Keyword(s):  
Underground Mining ◽  
High Strength ◽  
Horizontal Displacement ◽  
Confining Pressure ◽  
Rock Bolt ◽  
Physical Models ◽  
Strength Increase ◽  
Reinforcement System ◽  
Medium Strength ◽  
Bolt Reinforcement

The effects of reinforcement system on pillars were tested in laboratory, using three types of pillars with different strengths. The tests were performed using the UCS machine, to test pillar without reinforcement, pillar with rock bolt reinforcement, pillar with shotcrete reinforcement and pillar with the combination of both rock bolt and shotcrete reinforcement. Uniaxial compressive strength (UCS) testing aims to determine the effects of the reinforcement system on pillar strength. The results of this study indicate that the reinforcement system on high strength pillars causes a strength increase of 14.93% on pillar with rock bolt reinforcement, 21.45% on pillar with shotcrete reinforcement and 34.67% on pillar with combination of rock bolt and shotcrete reinforcement. On medium strength pillars, reinforcement installation shows a strength increase of 16.27% on pillar with reinforced rock bolt, 19.83% on pillar with reinforced shotcrete and 44.40% on pillar with combination of rock bolt and shotcrete reinforcement. Likewise, on low strength pillars, reinforcement installation causes a strength increase of 13.13% on pillar with reinforced rock bolt, 36.21% on pillar with reinforced shotcrete and 53.85% on pillar with combination of rock bolt and shotcrete reinforcement. The results of laboratory testing and numerical modeling indicate that the increase in strength occurs because the horizontal displacement on the surface of the pillar wall is detained by shotcrete and faceplate on rock bolt, so that the pillar seems to have confining pressure throughout the pillar wall surface, which is called as equivalent confining pressure.

scholarly journals MODELLING ROCK MASS IMPROVEMENT USING ROCK BOLTS

2017 ◽  
Vol 10 ◽  
pp. 43 ◽  
Author(s):  
Jan Pruška
Keyword(s):  
Rock Mass ◽  
Rock Bolt ◽  
Numerical Calculations ◽  
Underground Excavation ◽  
Rock Bolts ◽  
Fem Modelling ◽  
Excavation Stability ◽  
Bolt Reinforcement ◽  
Grouted Bolts ◽  
Underground Constructions

Anchor support currently represents a significant reinforcing technique in underground constructions. The principles of rock bolt reinforcement action are derived from various concepts of the underground excavation stability. In recent times, rock bolt design techniques have been complemented by numerical calculations procedures. The paper describes FEM modelling of a rock bolt system for mechanical and grouted bolts.

Validation of friction-anchored rock bolt characteristics

2019 ◽  
Vol 10 ◽  
pp. 35-43
Author(s):  
A.A. Zubkov ◽  
◽  
V.N. Kalmykov ◽  
I.M. Kutlubaev ◽  
M.S. Naydenova ◽  
...  
Keyword(s):  
Rock Bolt
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