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Mining Publication: Loading Characteristics of Mechanical Rib Bolts Determined Through Testing and Numerical Modeling
Keywords: Numerical modeling Roof bolts Support design and selection
Original creation date: January 2020
Authors: K Mohamed, G Rashed, Z Radakovic-Guzina
Peer Reviewed Journal Article - January 2020
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NIOSHTIC2 Number: 20058493
Int J Min Sci Technol 2020 Jan; 30(1):17-24
Underground coal mines use mechanical bolts in addition to other types of bolts to control the rib deformation and to stabilize the yielded coal ribs. Limited research has been conducted to understand the performance of the mechanical bolts in coal ribs. Researchers from the National Institute for Occupational Safety and Health (NIOSH) conducted this work to understand the loading characteristics of mechanical bolts (stiffness and capacity) installed in coal ribs at five underground coal mines. Standard pull-out tests were performed in this study to define the loading characteristics of mechanical rib bolts. Different installation torques were applied to the tested bolts based on the strength of the coal seam. A typical tri-linear load-deformation response for mechanical bolts was obtained from these tests. It was found that the anchorage capacity depended mainly on the coal strength. Guidelines for modeling mechanical bolts have been developed using the tri-linear load-deformation response. The outcome of this research provides essential data for rib support design.
First page of Loading Characteristics of Mechanical Rib Bolts Determined Through Testing and Numerical ModelingPeer Reviewed Journal Article - January 2020
Go to Web Page
NIOSHTIC2 Number: 20058493
Int J Min Sci Technol 2020 Jan; 30(1):17-24
See Also
ARBS - Analysis of Roof Bolt Systems - 2.5.02
Coal Bumps and Odd Dynamic Phenomena - A Numerical Investigation
Design of Primary Roof Support Systems in U.S. Coal Mines Based on the Analysis of Roof Fall Rates
Evaluation of the Impact of Standing Support on Ground Behavior in Longwall Tailgates
A First Step in Developing Roof Support Design Criteria Based on Ground Reaction Data for Pittsburgh Seam Longwall Tailgate Support
The Introduction of Roof Bolting to U.S. Underground Coal Mines (1948-1960): A Cautionary Tale
Investigation of Pillar-Roof Contact Failure in Northern Appalachian Stone Mine Workings
A Method for the Selection of Rock Support Based on Bolt Loading Measurements
Numerical Modeling for Increased Understanding of the Behavior and Performance of Coal Mine Stoppings
Preventing Falls of Ground in Coal Mines With Exceptionally Low-Strength Roof: Two Case Studies
Page last reviewed: March 7, 2022
Page last updated: March 7, 2022
Content source: National Institute for Occupational Safety and Health, Mining Program
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