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|The Roof Control Division of the Pittsburgh Safety and Health Technology Center, MS HA, is routinely involved in the evaluation of ground conditions in underground coal mines. Assessing the stability of mined areas and the compatibility of mining plans with existing conditions are essential elements in assuring a safe working environment at a given site. Since 1985, the Roof Control Division has successfully used the Boundary Element Method of Numerical Modeling as a tool to aid in the resolution of complex ground control problems. This paper will present an overview of the modeling methodology established and details of techniques currently used to generate coal seam, rock mass, and gob backfill input data. A summary of coal and rock properties used in numerous successful evaluations throughout the country will be included and a set of Deterioration Indices that can aid in the quantification of in-mine ground conditions and verification of model accuracy will be introduced. Finally, a case study will be detailed that typifies the complexity of mining situations analyzed and illustrates various techniques that can be used to evaluate prospective design alternatives.|
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|