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APPCOR12523
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APPCOR12523
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Entry Properties
Last modified
8/24/2016 6:32:56 PM
Creation date
11/19/2007 2:31:36 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981011
IBM Index Class Name
Application Correspondence
Doc Date
6/11/1980
Doc Name
REVIEW OF THE GEOTECHNICAL ASPECTS OF SUNLAND COALS APEX 2 UNDERGROUND COAL MINE
From
MLR
To
ROGER FUESION
Media Type
D
Archive
No
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' C <br />Pnrc 3 <br />Roger Puns ton <br />aunt .L.l. 1930 <br />:I'he subjecC slope alas or~iginnlly precipiCOUS1y steep, significantly exceeding <br />ZO drg,recr,. 'I'bis s.Lopc, Chcreforc, qu;il.if:ics ns n "steep slope" situation, <br />subject to pOSS'Lb.LL' steep sl.upe variance. In addition, the original portal <br />di.sCnrb;uice prcdnCCS Clio sin'Pnce mining ncC and is Cher.ef:ore, under section <br />4:L4.2 (1), a candirlaCC fur variance and backfill requirements. <br />'fhe applicant should redrsi.l;n the porCa.l backfill Co result in a final slope <br />caiCl~ Che safely Cactur in excess oC 1.~. 'fhe coal scam and sealed portals <br />:hnulrl be backFillyd, hcil: need not be covered ~aiCh fi' to 10' of material as <br />a:iginally proposed. '1'Ire Linal backfill slope should be topsoiled and reveRetated. <br />The mnCCr~ial. should he plnr_ed in Clcin 1.iCCS, not Co ercecd approximately 2', <br />and appropriately compacCCd i.n order Co achieve the design factor of safety <br />~in r•.;:ccn;: of L. 7. <br />JP/r,p <br />
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