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|This Bureau of Mines report considers some equations for mine pillar design from 1833 to the present. Most of the equations are of essentially the same kind, using pillar width to height relationships. The effects of end constraint and test volume size, that were implied in some of these early equations have received special emphasis in recent years. Experimental testing in the laboratory throughout the period given has been on prisms or cubes of coal or rock. Most of the present concepts have been known since about 1912. Wilson has recently emphasized the effect of end constraint in his confined core concept, but a number of other earlier relationships have indicated an awareness of the effects of constraint as well.|
Additional chapters/articles from the SME-ICGCM book Proceedings Of The 1st Annual Conference On Ground Control In Mining
|Stress And Stability In Coal Ribsides And Pillars||Improved Design Of Coal Pillars For U.S. Mining Conditions||Review Of Pillar Design Equations Including The Effects Of C||Abutment Pillar "Notching" Improves Abutment Tunnel Roof Con||The Influence Of Certain Geologic And Geotechnical Factors O||Considerations Of Gas Outbursts In Using Dome Salt Mines For||An Overview Of Bureau Of Mines Ground Control Research||Stability Behaviour Of Coal Mining Tunnels With Different Su||Strata Disturbance Prediction For Mining Beneath Surface Wat||Monitoring For The Evaluation Of The Stability Of Undergroun||Controlled Thrust And Torque Placement Of Mechanical Anchor||Roklok Polyurethane Binder: A Chemical Injection System For||Resupporting High Roof Falls||A New Combination Friction-Suspension Support System Scott||Inorganic Cement Grouted Bolt System||Development Of A Resin Point Anchor||An Engineering Analysis Of "Squeeze" Failure Of Pillars In T||Ground Control In Multiple Seam Mining||Applications Of Reflection Seismics To Mapping Coal Seam Str||The Use Of Geologic Modeling In The Prediction Of Adverse Ro||Design Of Shield Supports For The U.S. Coal Mining Industry||Longwall Mining Of Thin Seams||Support Selection For The Multi-Lift Mining Method||Design And Operation Of Powered And Entry Supports||Evaluation Of Existing Predictive Methods For Mine Subsidenc||A Study Of Longwall Subsidence In The Appalachian Coal Regio||Subsidence Studies In Thick And Steep Coal Seam Mining|