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2022-08-11_REVISION - M1994117
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2022-08-11_REVISION - M1994117
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Entry Properties
Last modified
8/15/2022 8:33:16 PM
Creation date
8/15/2022 7:45:54 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1994117
IBM Index Class Name
Revision
Doc Date
8/11/2022
Doc Name
Request for Technical Revision
From
Colorado Milling Company, LLC
To
DRMS
Type & Sequence
TR11
Email Name
JPL
JLE
AWA
Media Type
D
Archive
No
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SCHNABEL ENGINEERING <br /> BY...RLC....DATE...........3/15/22....... SHEET NO...........OF............ <br /> CHECKED BY...CMG....DATE............ JOB NO.................................. <br /> SUBJECT......TIMES MINE BULKHEAD............................................................................................................................................... <br /> CALCULATION - HYDROFRAC <br /> Maximum Hydraulic Pressure Head p:=H•-y,,,=44.6 psi <br /> (p) <br /> Minimum Rock Cover Required (Z): Hydrofrac (Abel Z:= (p) =19.5 ft <br /> Method) 2•`Y, <br /> Minimum Rock Cover Required Zh : H drojack Z (��•y°•FRc) =43.8 ft <br /> q ( 1) Y 1 H� <br /> (Y, •cos(a)) <br /> Minimum contact grout pressure 0-minGP:=Bw•-yw=11.3 psi <br /> (0,minGP) <br /> Maximum contract grout pressure 0'maxGP:=2•B1,,•-yr=59.6 psi <br /> (Abel assumption of 2x Bw) <br /> Maximum contact rout pressure Based on (2•Ba •yr•cos(/3)) =53 psi <br /> 9 p ( maxNTA/•— <br /> NTM) FRC <br /> Required bulkhead thickness <br /> for pressure gradient (Lhp) Lhp:= =1.1 ft <br /> pay <br />
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