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REP14910
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REP14910
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Entry Properties
Last modified
8/24/2016 11:44:36 PM
Creation date
11/27/2007 1:32:30 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1983194
IBM Index Class Name
Report
Doc Date
4/21/2003
Doc Name
Submittal of Geotechnical Reports from 1995
From
Natural Soda Inc.
To
DMG
Media Type
D
Archive
No
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Page i <br />AN EVALUATION OF IMPACTS <br />'~~~ OF HIGH-EXTRACTION SOLUTION MINING <br />ON OVERLYING AQUIFERS <br />AND MINABILITY OF OIL SHALE <br />TABLE OF CONTENTS <br />Section Paee <br />1.0 INTRODUCTION ..............:............................................ . 1 <br />2.0 MINE PLAN AND AVAILABLE RESOURCE ............................ . 2 <br />2.1 Mine Plan ............................................................... 2 <br />2.2 Available Resource ...................................................... 4 <br />2.3 Overlying Stratigraphy ................................................... 4 <br />3.0 CAVITY SHAPES AND COLLAPSE MECHANISMS ..................... 9 <br />3.1 Possible Solution Mining Cavern Shapes ................................. 9 <br />3.2 Cave Development ....................................................... 11 <br />4.0 CASE STUDIES AND CRITERIA .......................................... 13 <br />4.1 Introduction ............................................................. 13 <br />4.2 Multiple-Seam Coal Mining ............................................. 13 <br />4.2.1 Impact of Minability of the Upper Seam from the Lower Seam <br />Mining .......................................................... 13 <br />4.2.2 Effect of Underground Mining on Groundwater .................. 16 <br />r 4.3 Evaluation Criteria ....................................................... 17 <br />, <br />`~~~ 5.0 ANALYTICAL EVALUATION OF PROPOSED MINE PLAN ............ 18 <br />5.1 Introduction ............................................................. 18 <br />5.2 Two-Dimensional Finite Difference Analysis ............................ 18 <br />5.2.1 Stratigraphy and Model Pazameters .............................. 18 <br />5.2.2 Analysis Results ................................................. 21 <br />5.3 Surface Subsidence Prediction ........................................... 21 <br />6.0 CONCLUSIONS AND RECOMMENDATIONS ............................ 30 <br />7.0 REFERENCES ............................................................... 31 <br />APPENDIX A-Calculation of the Height of Caving Zone .......................... A-1 <br />APPENDIX B-Two-Dimensional Finite Difference Analysis Results .............. B-1 <br />APPENDIX C-Evaluation of Changes on the Hydraulic Conductivities in the <br />Aquitard and Aquifer ............................................................ C-1 <br />LIST OF TABLES <br />Table pate <br />2-1 Thicknesses of the Various Beds and the Equivalent Nahcolite Thickness ...... 6 <br />2-2 Typical Depth and Thicknesses of Overlying Strata from Core Hole 26-88-1 ... 8 <br />4-1 Multiple-Seam Longwall Mines ......... .............. 13 <br />........................ <br />5-1 Geomechanics Properties ...................................................... 19 <br />i <br />Agapito Associates, Inc. <br />
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