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Page ii <br />' ~ LIST OF FIGURES <br />Figure Page <br />2-1 Schematic of Solution Mining System ......................................... 3 <br />2-2 Stratigraphic Cross-Section MMC-IRI-1 to MMC-IRI-S, Dissolution Surface to <br />Base of Boies Bed ............................................................ 5 <br />2-3 Contour and Three-Dimensional Representation of the Equivalent Nahcolite <br />Thickness ................:.................................................... 7 <br />3-1 Possible Solution Mining Cavern Shapes ....................................... 10 <br />3-2 End-View Solution Cavity Configuration after Caving ......................... 12 <br />4=1 Three Zones in Overburden Due to Longwall Mining .......................... 15 <br />4-2 Interseam Shearing ............................................................ 16 <br />5-1 Material Models for Finite-Difference Analysis, 50-ft Caving Scenario ......... 20 <br />5-2 Material Models for Finite-Difference Analysis, 160-ft Caving Scenario ........ 20 <br />5-3 Predicted Horizontal Strains for 50-ft Caving Scenario ......................... 23 <br />5-4 Predicted Horizontal Strains for 160-ft Caving Scenario ........................ 23 <br />5-5 Predicted Surface Subsidence and Horizontal Displacement for 50-ft Cavern <br />Scenario ....................................................................... 24 <br />5-6 Predicted Surface Subsidence and Horizontal Displacement for 160-ft Cavern <br />Scenario ....................................................................... 2~ <br />~-7 Predicted Surface Subsidence and Horizontal Displacement for Two 800-ft <br />Panels ......................................................................... 26 <br />5-8 Range and Orientation of Solution-Mined Panels ............................... 27 <br />_ 5-9 Predicted Surface Subsidence Based on Integration of Influence Function ...... 29 <br />j <br />Agapito Associates, Inc. <br />