2020-06-30_REVISION - M1974086 ‎(6)‎

• Permit No: M1974086
• IBM Index Class Name: REVISION
• Doc Date: 6/30/2020
• Doc Name: Request for Technical Revision
• From: Asphalt Paving Co.
• To: DRMS
• Type & Sequence: TR4
• Email Name: ECS
• Email Name: MAC
• Email Name: AWA
• Media Type: D
• Archive: No

----------------
0.00 6106.00 759.00 6106.00
Piezometric Surfaces (2 surfaces)
--------------------
Surface within profile: 1 (5 points) - Tailings
1.00 6148.00 200.00 6180.00 280.00 6183.00 438.00 6235.30 743.00
6386.00
Surface within profile: 2 (5 points) - Colluvium
1.00 6148.00 200.00 6180.00 280.00 6183.00 438.00 6235.30 743.00
6386.00
Failure Surface (Critical, from previous analysis)
---------------
Initial circular surface for critical search defined by: XL,XR,R
Intersects: XL: 333.89 YL: 6230.87 XR: 647.39 YR: 6369.61
Centre: XC: 325.16 YC: 6674.16 Radius: R: 443.38
Variable Restraints
-------------------
Parameter descriptor: XL XR R
Range of variation: 268.00 371.00 25.00
Trial positions within range: 20 20 18
- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -
RESULTS: Analysis 2 - Zone 3B
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: 1.304
There were: 4324 successful analyses from a total of 7201 trial surfaces
2877 analyses terminated due to unacceptable geometry
Critical (minimum) Factor of Safety: 1.24
Results Summary - Lowest 99 Factor of Safety circles
----------------------------------------------------
Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS
1 397.37 6247.92 676.68 6382.78 354.72 6692.94 447.06 1.237 <-- Critical
Surface
2 397.37 6247.92 676.68 6382.78 354.04 6694.35 448.53 1.238
3 397.37 6247.92 676.68 6382.78 353.35 6695.76 450.00 1.244
4 397.37 6247.92 676.68 6382.78 352.67 6697.17 451.47 1.247
5 411.47 6251.71 676.68 6382.78 364.77 6680.05 430.88 1.249
6 397.37 6247.92 676.68 6382.78 351.99 6698.58 452.94 1.249
7 411.47 6251.71 676.68 6382.78 364.08 6681.46 432.35 1.250
8 411.47 6251.71 676.68 6382.78 363.39 6682.86 433.82 1.252
9 397.37 6247.92 676.68 6382.78 351.31 6699.99 454.41 1.254
10 411.47 6251.71 676.68 6382.78 362.69 6684.26 435.29 1.255
11 397.37 6247.92 676.68 6382.78 350.63 6701.40 455.88 1.255
12 411.47 6251.71 676.68 6382.78 362.00 6685.66 436.76 1.258
13 411.47 6251.71 676.68 6382.78 361.31 6687.06 438.24 1.260