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|A summary of the results of a limited subsidence monitoring program at Cyprus Amax Coal Company's Shoshone Mine No. 1 in the Hanna Basin of south central Wyoming is presented. The monitoring program was designed to meet regulatory requirements for confirmation of subsidence predictions made in the mining permit. The longwall panels were 380 ft to 600-ft wide. Mining heights varied from 11 ft to 13.5 ft. Gate road development included three-entry and two-entry head and tail gates. Overburden depth varied from 150 to 945 ft. The coal seam and overburden dip at approximately 11 degrees. The overburden is very low to low strength mudstone and carbonaceous shale with low to moderate strength, silty sandstone interbeds. Panel W/h ratios varied from subcritical to supercritical. Smax was 0.9 of the mining height. The subsidence ratio was about 0.6 for subcritical width. The draw angle on the up-dip side averaged 20 deg. The draw angle on the down-dip side averaged 12 deg.|
Additional chapters/articles from the SME-ICGCM book Proceedings of 14th International Conference on Ground Control in fining
|Truss Systems For Longwall Tailgate Support - Update||Cable Support Systems For Longwall Gate Road Stability||Innovative Tailgate Support For Heavy Ground: 11 Left Longwa||Parameters Affecting Resin-Anchored Cable Bolt Performance:||Roof Support Performance In High Stress Conditions||Regional Horizontal Stress And Its Effect On Longwall Mining||Deformation Development Around Mine Roadways And Simulation||Monitoring Mobile Roof Supports||Analysis Of Retreat Mining Pillar Stability||Planning And Design For Barrier Pillar Recovery Three Case H||Influence Of Partings In A Coal Seam On Long Term Pillar Sta||A Cooperative Study Of Gate Entry Designs Welbeck Colliery (||Comparative Case Study Of Yielding And Critical Coal Pillar||Comparison Of Empirical, Analytical, And Numerical Methods O||Nonlinear Approach For Determining Design Criteria For Yield||In-Situ Coal Strength Determination - Case Studies||The Design And Application Of Propsetter? In Underground Coa||Renewed Interest In Prop Supports As A Replacement For Wood||Improved Intersection Design And Monitoring In The Sydney Co||Drivage System In Retreat Longwall Gateroad||Case Study Of Stability Investigations Related To Shallow Un||Analysis Of Rockbolt Performance At The Waste Isolation Pilo||Continuous Improvement In Cuttable Coal Rib Support In Austr||Floor Failure Induced By Lateral Stress Ahead Of Longwall Su||Towards A Method Of Determining Floor Quality In An Undergro||Chinese And North American High-Extraction Underground Coal||Integration Of CAD-Based Mine Planning And Subsidence Engine||Development Of A Subsidence Database And Determination Of Su||Statistical Regional Calibration Of Subsidence Prediction Mo||Subsidence Monitoring Results, Thick Seam Longwall Mining In||Application Of Mechanical And Groundwater-Flow Models To Pre||The Application Of Underground In-Seam Seismic Methods (UISS||Vertical Stress Redistribution Around A Retreating Longwall||Entry Stability Monitoring & Analysis For Longwall & Continu||A Case Study Of A Deformation Mechanism Around A Two-Entry G||Multiseam Mining On South African Collieries||Design And Planning Of Lower Seam Longwall Gateroads||Optimizing Pillar Design In A Multi-Seam Environment|