PERMFILE137027

• Permit No: C1981041
• IBM Index Class Name: Permit File
• Doc Date: 5/13/2002
• Doc Name: Protective Pillar Design for Ute Water Property ‎(10/81)‎
• Section_Exhibit Name: Tab 20 Appendix 20-1
• Media Type: D
• Archive: No

iii

• TABLE OF CONTENTS

Summary .............................................................................................. ii
... Introduction» ....................................................................................... I
Strength of Cameo "B" Coal Seam» ......................».»......................». 2
~_
Pillar Strength - Ponel "C" .................................................................
6
' Pillar Design - Ute Water Co. Area ................................................... I I
Pillar Design - 2nd East Section ..............».......................................» IS
Potential Subsidence Effects ............................................................... 19
Conclusions and Recommendations ...................................................... 23
Appendix A, Test Results ................................................................... 24
Appendix B, Physical Test Results - Western Coals ........................... 28
Appendix C, Confined Core Pillar Loadinq Analysis .......................... 29
•
Appendix D, Loan Transfer Data ....................................................... 36
Appendix E, Subsidence Tolerances .................................................... 39
References .......................................................................»............... 44