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Mining Publication: External L5-S1 Joint Moments When Lifting Wire Mesh Screen Used to Prevent Rock Falls in Underground Mines
Keywords: Lifting or lowering Roof falls Roof screen
Original creation date: September 2009
Authors: S Gallagher, S Kotowski, KG Davis, C Mark, CS Compton, RL Huston, J Connelly
Peer Reviewed Journal Article - September 2009
Download PDF Document (1.64 MB)
NIOSHTIC2 Number: 20035010
Int J Ind Ergon 2009 Sep; 39(5):828-834
Bolting large sheets of wire mesh screen (WMS) to the roof of underground mines prevents injuries due to rock falls. However, WMS can be heavy and awkward to lift and transport, and may result in significant spinal loading. Accordingly, six male subjects (mean age = 45.8 years + 7.5 SD) were recruited to lift WMS in a laboratory investigation of the biomechanical demands. Biomechanical modeling was used to estimate external moments about L5-S1 for sixteen lifting tasks, using two sizes of WMS. Full-size WMS involved a two-person lift, while half-size WMS involved a one-person lift. Lifts were performed under 168 cm and 213 cm vertical space. Restriction in vertical space increased the maximum L5-S1 extensor moment from 254 to 274 Nm and right lateral bending moment from 195 to 251 Nm. Lifting full sheets of screen (as opposed to half sheets) resulted in an average 33 Nm increase in L5-S1 extensor moment. The L5-S1 extensor moment was increased by an average of 44 Nm (18%) when lifting screens positioned flat on the floor compared to an upright position.
Image of publication External L5-S1 Joint Moments When Lifting Wire Mesh Screen Used to Prevent Rock Falls in Underground MinesPeer Reviewed Journal Article - September 2009
Download PDF Document (1.64 MB)
NIOSHTIC2 Number: 20035010
Int J Ind Ergon 2009 Sep; 39(5):828-834
See Also
Best Practices and Bolting Machine Innovations for Roof Screening
Load Capacity and Stiffness Characteristics of Screen Materials Used for Surface Control in Underground Coal Mines
Make it Safer with Roof Screen
Manual Materials Handling
Optimizing Secondary Roof Support with the NIOSH Support Technology Optimization Program (STOP)
Performance Characteristics for Welded Wire Screen Used for Surface Control in Underground Coal Mines
Potential of Roof Screening to Reduce Workers' Compensation Cost
Reduced Workers� Compensation Costs With Roof Screening
Roof Screening: Best Practices and Roof Bolting Machines
Technology News 483 - Safety Training Tools for Rock Scaling Personnel
Technology News 508 - NIOSH Releases New Safety Video: Make It Safer With Roof Screen
Page last reviewed: March 15, 2017
Page last updated: March 15, 2017
Content source: National Institute for Occupational Safety and Health, Mining Program
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