2025-07-03_REVISION - M1987079

• Permit No: M1987079
• IBM Index Class Name: Revision
• Doc Date: 7/3/2025
• Doc Name: Request For Succession Of Operator
• From: Oldcastle SW Group, Inc dba United Companies
• To: DRMS
• Type & Sequence: SO1
• Email Name: UEA
• Email Name: AME
• Email Name: SMS
• Email Name: EL1
• Media Type: D
• Archive: No

Initial circular surface for critical search defined by:XL,XR,R
Intersects: XL: 194.40 YL: 4040.00 XR: 250.90 YR: 4008.50
Centre: XC: 260.05 YC: 4091.33 Radius: R: 83.33
Variable Restraints
Parameter descriptor: XL XR R
Range of variation: 50.00 1.00 25.00
Trial positions within range: 25 1 25
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RESULTS:Analysis 1 -Active Mining Condition
Bishop Simplified Method of Analysis-Circular Failure Surface
Critical Failure Surface Search using Multiple Circle Generation Techniques
Factor of Safety for initial failure surface approximation: 2.410
There were:613 successful analyses from a total of 625 trial surfaces
12 analyses terminated due to unacceptable geometry
Critical(minimum)Factor of Safety: 1.16
Results Summary-Lowest 99 Factor of Safety circles
Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS
1 219.40 4040.00 250.90 4008.50 301.06 4090.16 95.83 1.162 <--Critical Surface
2 219.40 4040.00 250.90 4008.50 300.30 4089.40 94.79 1.165
3 219.40 4040.00 250.90 4008.50 299.54 4088.64 93.75 1.167
4 219.40 4040.00 250.90 4008.50 298.78 4087.88 92.71 1.170
5 219.40 4040.00 250.90 4008.50 298.02 4087.12 91.66 1.173
6 219.40 4040.00 250.90 4008.50 297.26 4086.36 90.62 1.175
7 219.40 4040.00 250.90 4008.50 296.50 4085.60 89.58 1.178
8 219.40 4040.00 250.90 4008.50 295.74 4084.84 88.54 1.181
9 219.40 4040.00 250.90 4008.50 294.98 4084.08 87.50 1.184
10 219.40 4040.00 250.90 4008.50 294.22 4083.32 86.46 1.187
11 219.40 4040.00 250.90 4008.50 293.46 4082.56 85.41 1.191
12 219.40 4040.00 250.90 4008.50 292.69 4081.79 84.37 1.194
13 219.40 4040.00 250.90 4008.50 291.93 4081.03 83.33 1.197
14 219.40 4040.00 250.90 4008.50 291.16 4080.26 82.29 1.201
15 219.40 4040.00 250.90 4008.50 290.40 4079.50 81.25 1.205
16 219.40 4040.00 250.90 4008.50 289.63 4078.73 80.21 1.208
17 219.40 4040.00 250.90 4008.50 288.87 4077.97 79.16 1.212
18 219.40 4040.00 250.90 4008.50 288.10 4077.20 78.12 1.216
19 219.40 4040.00 250.90 4008.50 287.33 4076.43 77.08 1.221