PERMFILE124988

• Permit No: C1981022
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: STABILITY ANALYSIS OF RECLAIMED CONTOURS
• Section_Exhibit Name: Exhibit 2.05-E2 Part 1
• Media Type: D
• Archive: No

• Tha Ihining and Reclamati.or, flan for Somerset Mine contains
rege.lest far a ~a.riance to r=storing three areas to appru:;imate
Or'1.glnal conto~_rrs, rehear- to pages ~.~)h-4 Yp ~~.!~h-1~1. bteep
slopes maL::e r-~=storati!~n ~_+ h.he Bear and Hubbard Carryon ventilation
facili.~ticas and t.lre I_a:z.;r Canyar-, B Seam degas sil:e impract~.ca.l.
U. _. 3tre1 hlini. r~•_i I_u. cor-~~1 ~_rc t_ed a st•_,bility analysis of tfle
pr'_7po;ed ;~i.na.l cor,i.=o~_Ir~ ':-on±_~rned in the Somerset Kline permit
-.pp.l lea±i.or~.
GE_fJEF+ril_
Tlir_~ f;eta{_i.one_L Ege.ri.librium rnalysis of h1~_rltilayered Err~GanL~.rnent
(F'EAh1Ei ~~;rograrr~, de~~ el op ed by th_ Univer=_ity of K~entucF~y, wets
~_rsed to par'farm i:h~• safety fac:tur c:~~lculatii~ns. A circular-
fa.ilure s~_rrface ~is a.ssumFd under a rotating mass. The mass
is drvi~~ic:d into s.tices and the se.lm of moments tending to ca~_rse
~;•.r,~1 r~esis± fa.ilur-e ~:,.re deterrr,ir~ed. The safety factor is the
ratio ~,f {_hess~' two s~.lms. REAh1E c:an r_a.lculate the safety factor
usxn{1 ezr.i~.t~~er the r-,orn,.~.l method or the sin~,plified Eishap method.
A1. 7. _~.lc~-i.L_.t.eca-is .,.are cornp.leted using the simplified Pi shop
n~etf_,od.
=oa.1. s~•~nples were ar,alyzvd to determine the internal angle o+
friction :.nd cehe•sir_•n. One sample w;?.s ta4;en along ±.he crass
section 1..rne I.-C. :;hover, on h1a.p C>?--12_1 in He.IGGard Cre-•F:. This
• s•an,ple wa=_ used tp n'~odel the sail char acteristir_s ^f the uncr._~r,-
soli~.lat~d ..,l.luvixal ,na.teri.al ~.n HuLbr.r,-i CreeF::. n second coil.
~.ntpl_ ~•i.?.s taf;er, a~h thN Erea.r- 1_r=_.~=4; f=ar-,. This s•_.~nple was ~_rsed
Kra m•„iel the =ci1 ct-~aracJ._eri.sties of 'the Clear CanYOn Fan r;re;a
ar-,ra r.l-,rz L"t~-~~_;~.~=„n Oraga•= I~Tole iboth _~re located in L•r_ar Cree4i).
L~_Irirna !Kee s~_unm-~r- o+ 1'=+El' J.1=.1-. Agapito and Associa±es c:ond!rcted
rw_4:: n,e-rehe•.nics ~.atl.rdir_~s 'underground in Hubbard Creel: area of
Snmers•=t Kline. These studies determined that. a~:erage proper±ie_
f~~r the r!~of racF~: are as follows:
Urn_onfined Compressive Strength 1014 psi
Cohesion =542 psi (SC4,-1~FSpsf)
Angle of Internal Friction 4x1.15 degrees
these values were used to represent ~_he properties of any ruck:
ue~tcrops encountered in the ar~alysis.
C~ '_Ff;M DEGAS HALE F~REA - FEAR CF:EEI::
Map r,f3-l.~cl`a contained in the Somerset Kline hlininq and keclamation
Flan ,.peacie _..Ob-r;] ;hews a plan view and cross section of the
d~=gas hole area.. i_]. ~. Steel hlining Co, investi~.3ated the area
al.~-anq __caion A-r; a.nd de*s.rn~,ined the geoJ.ogic str~_.rc±,_Ire shown
an E.~hil.',it A. T~E',is H~^3 then ,_ISed to develope the sectic•n shown
• in F~;i-,ibit fi •.an whi•..h the sta.br.lity anal ;:sis was conducted.