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Mining Publication: Technology News 467 - Wood Crib Performance Model
Keywords: Support design and selection Wood cribs
Original creation date: November 1997
Authors: National Institute for Occupational Safety and Health
Technology News - November 1997
Download PDF Document (0.15 MB)
NIOSHTIC2 Number: 00241696
Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, NIOSH 1997 Nov; :1-2
A wood crib performance model (WCPM) was developed to assist in the design of wood cribs and their deployment in mines to ensure the safety of underground coal mine workers. The WPCM was developed through full scale testing of wood crib supports in a mine roof simulator load frame at NIOSH in the Pittsburgh Research laboratory. The design was evaluated under several hundred full scale tests. This interactive computer program was written in Microsoft QuickBASIC and had the advantage that it was easy to use. There were five subprograms, each with its own purpose and function: WPCM, MINLOAD, CRIBOPT, PLACOPT, SYSOPT. WCPM computed crib load as a function of displacement of the support structure induced by roof and floor convergence, assisting the user with recommendations to improve construction of the current crib. MINLOAD helped define support requirements based on the conditions of the designated mine. CRIBOPT optimized wood crib design by determining whether to use a 4 or a 9 point crib and what size timbers were needed to provide the needed support. PLACOPT determined the optimum crib spacing for a specific crib design and required support capacity per foot of mine entry. Finally, SYSOPT evaluated the material handing requirements and cost of the current support design along with the support capacity and allowed comparison of up to three alternative support systems.
Image of publication Technology News 467 - Wood Crib Performance ModelTechnology News - November 1997
Download PDF Document (0.15 MB)
NIOSHTIC2 Number: 00241696
Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, NIOSH 1997 Nov; :1-2
See Also
Design Methodology for Standing Secondary Roof Support in Longwall Tailgates
Diagnosing and Controlling Moisture-Sensitive Roof in Coal Mines
Longwall Tailgates: The Technology for Roof Support Has Improved, but Optimization is Still Not There
Optimizing Secondary Roof Support with the NIOSH Support Technology Optimization Program (STOP)
Overview of Coal Mine Ground Control Issues in the Illinois Basin
Pillar and Roof Span Design Guidelines for Underground Stone Mines
Standing Support Alternatives in Western Longwalls
Standing Support Alternatives in Western United States Longwalls
Technology News 482 - Ground Support Safety Training Video
Updating the NIOSH Support Technology Optimization Program (STOP) With New Support Technologies and Additional Design Features
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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