Assessment Of Wood And Alternative Materials For Supplemental Roof Support Construction

Barczak, Thomas M.
Organization: International Conference on Ground Control in Mining
Pages: 11
Publication Date: Jan 1, 1994
The engineering of a support system is driven largely by economics. The goal is to provide effective support at minimal cost. For this reason, wood has been extensively used as a support material for centuries. The cost of timber for mining applications has risen by more than 50% in the past 5 years and is likely to continue to increase as the supply diminishes and further environmental restrictions are placed on timber harvesting. The increased cost and lack of high strength wood in the Western United States has provided incentives to improve the utilization of wood and to develop alternative support materials. This U.S. Bureau of Mines' (USBM) report discusses the basic engineering requirements for the application of various materials for supplemental roof support construction and provides an overview of support systems that use materials other than wood. A comparison of support performance and cost for various material constructions is made to assist the mine operator in support selection. The scope of materials discussed in the report include: (1) conventional mine timber loaded perpendicular to the grain, (2) parallel to the grain timber loading, (3) steel fiber reinforced and air entrained concrete, (4) steel, (5) granular fill materials, and (6) combinations of these as composite support structures. The range of support systems analyzed include wood and concrete cribs, concrete columns and props, steel beams, friction props, and several novel support concepts.
Full Article Download:
(3484 kb)

Additional chapters/articles from the SME-ICGCM book Proceedings of 13th International Conference on Ground Control in Mining

Cable Bolting - Potential Applications For Variable Strata C
Evaluation Of Support Performance In A Highly Stressed Mine
Operational Experience With FLEXIBOLT Systems In Australian
Roofbolting In The Cape Breton Development Corporation'
Some Factors Influencing Stability Of Longwall Gateroad
Design Of Roadway Support Using A Strain Softening Model
Automation Of A Progressive Failure Procedure For Analysis O
The Massive Collapse Of Coal Pillars - Case Histories From T
Time Dependent Strength Of Coal Strata For Long-Term Pillar
Yield Pillar Behavior At Jim Walter No. 7 Mine Stress And St
A Comparison Of Overburden Response Due To Longwall Mining
Longwall Ground Behavior Characteristics In The Illinois Coa
Cavability Study Of A Competent Roof - A Case Study
Roof Pressure Monitoring Using The Integrated Longwalt Autom
Longwall Production, Maintenance, And Roof Control System
The Design And Selection Of Powered Supports For Application
Tailgate Support Practice In U.S. Longwall Mines - A Survey
Influence Of Support Capacity And Geometry On Tailgate Suppo
Innovative Concept In Tailgate Entry Support: Elimination Of
Resin-Grouted Cables For Longwall Tailgate Support Stability
Tailgate Roadway Convergence: A Key Indicator Of Potential G
Assessment Of Wood And Alternative Materials For Supplementa
Experience With The Boundary Element Method Of Numerical Mod
The Fault At The End Of The Tunnel
Microseismic Monitoring In The Sydney Coalfield
Realistic Design Of Ground Control Based On Geotechnical Dat
Underground High Resolution Seismic Method As A Low Cost Alt
Pillarless Longwall Mining For Multiple Seams
Stable Entry Design In A Multi-Seam Environment
Evaluating Roof Control In Underground Coal Mines With The C
Hazard Mapping Combining Geostatistical Modeling Of Coal Min
Stereological Sampling And Analysis For Characterizing Disco
Determining Horizontal Stress Direction Using The Stress Map
Stability And Stress Evaluation In Mines Using In-Seam Seism
Hydrogeologic Effects Of Subsidence At A Longwall Mine In Th
Monitoring Railroad Response To Mining Subsidence And Assess
Study On The High-Pressure Grouting Of The Overburden For Su