2021-12-29_PERMIT FILE - M2021009 ‎(23)‎

• Permit No: M2021009
• IBM Index Class Name: Permit File
• Doc Date: 12/29/2021
• Doc Name Note: Appendix GS-1 - Galena Informatinon
• Doc Name: Adequacy Review Response
• From: Lewicki & Associates/Young Ranch Resource, LLC
• To: DRMS
• Email Name: AME
• Email Name: MAC
• Media Type: D
• Archive: No

-------------------
Parameter descriptor: XL XR R
Range of variation: 300.00 200.00 150.00
Trial positions within range: 50 50 50
- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -
7.2. RESULTS: Analysis 7 - Reclaimed Mined Bench Slope
Bishop Simplified Method of Analysis-Circular Failure Surface
---------------------------------------------------------------
Critical Failure Surface Search using Multiple Circle Generation Techniques
Initial failure surface approximation-Factor of Safety: 36.559
Analysis Summary
----------------
There were: 125001 successful analyses from a total of 125001 trial failure surfaces
Critical(minimum) Factor of Safety: 1.94
------------------------------------------
Results Summary-Lowest 99 Factor of Safety circles
----------------------------------------------------
Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS
1 340.10 8203.00 382.80 8181.01 739.03 8925.14 825.00 1.942 <--Critical Surface
2 340.10 8203.00 382.80 8181.01 737.62 8922.41 821.94 1.942
3 340.10 8203.00 382.80 8181.01 732.01 8911.52 809.69 1.942
4 340.10 8203.00 382.80 8181.01 736.22 8919.69 818.88 1.942
5 340.10 8203.00 382.80 8181.01 733.42 8914.25 812.76 1.942
6 340.10 8203.00 382.80 8181.01 734.82 8916.97 815.82 1.942
7 340.10 8203.00 382.80 8181.01 725.00 8897.91 794.39 1.942
8 340.10 8203.00 382.80 8181.01 730.61 8908.80 806.63 1.942
9 340.10 8203.00 382.80 8181.01 729.21 8906.08 803.57 1.942
10 340.10 8203.00 382.80 8181.01 727.81 8903.36 800.51 1.942
11 340.10 8203.00 382.80 8181.01 726.41 8900.63 797.45 1.942
12 340.10 8203.00 382.80 8181.01 723.60 8895.19 791.33 1.942
13 340.10 8203.00 382.80 8181.01 720.80 8889.74 785.20 1.942
14 340.10 8203.00 382.80 8181.01 717.99 8884.30 779.08 1.942
15 340.10 8203.00 382.80 8181.01 722.20 8892.46 788.27 1.942
16 340.10 8203.00 382.80 8181.01 719.39 8887.02 782.14 1.942
17 340.10 8203.00 382.80 8181.01 716.59 8881.57 776.02 1.942
18 340.10 8203.00 382.80 8181.01 713.79 8876.13 769.90 1.943
19 340.10 8203.00 382.80 8181.01 710.98 8870.68 763.78 1.943
20 340.10 8203.00 382.80 8181.01 712.38 8873.40 766.84 1.943
21 340.10 8203.00 382.80 8181.01 715.19 8878.85 772.96 1.943
22 340.10 8203.00 382.80 8181.01 708.18 8865.24 757.65 1.943
23 340.10 8203.00 386.88 8178.91 741.03 8924.02 825.00 1.943
24 340.10 8203.00 386.88 8178.91 738.23 8918.58 818.88 1.943
YRR Geotech
October 2021 34 Lewicki&Associates