PERMFILE57196

• Permit No: M1999002
• IBM Index Class Name: Permit File
• Doc Date: 6/18/1999
• Doc Name: OBJECTORS EXHIBIT
• Media Type: D
• Archive: No

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FIG. 1. (a) Inslallatlon for Monitoring of Rock Deformation; and (b) Associated
TDR Dala for Deformation above Longwall Minc
was w•rillen to allow gr;lpltical analysis of large, raw data files produced by
high-resuhdiun digiLd veccions o('I'D It sign:dures for cables hundreds of
ntclcrs long. II will L•ICilil:nc Display, cumpa rival, analysis, :uul xnnnully
of 'fh12 w•avcfunm ronsiNing of as m:ulp as 2.5111 Bala puiuls. Arqui~inun
and Iranslnissiun of thrsc Iargr files via nunlew reyuin'd Ute Iclrcunuuu-
niattiun amlrul protuatl, NUMOb.
'hhe pascal study was made nl a lungwall coal tutor :n the mining Faa•
advanced luw:ml the prcinstallcd ctble.'I'I)IL signaltncs wcrc acquired Iwicc
daily and compared wish defonualion nteauacd un the surface. Subsurface
dcfurnlalion mc;lsund h)• ~1 ~1)IL was shmvn In he Ioc:diicd ;end pn•dumi~
nalcly shearing in nahu~c. Localized changes wcrc detected at depth sonic
four days bcforc the rlcfurmalion was observed al the surface.
'this :u~l icle begins wish a dcscliptinn u( the site :end is followed by an
interprcudion of the results of dlc twice-daily remote polling, DGails u(Ihc
inst nnncnlaliun and installation procedure arc contained iu the Appendix
of thts p:q,cr.
SITE
Geometry of ~9iuin);
Old IScu Coal Company's Minc No. 2.5 is totaled in I~t anklin County near
Well Fraukfurl, fll. As shown iu Pig. 2, the borehole for the "Tll1L cable
was fuelled near a residential slnlclure west of I Icnm Koad. Location of
the lungwall miuc face in the curd se:un some 15') m (522 (t) below ix indiealerl
by the Thick, nullh-south lines identified by d;de. A schematic west-(u-call
cross section in Pig. 3 shows the lonsa•all face advancing westward toward
the verlic;tl TllR hole. "phis face advanced Toward the TDR cable a[ the
consuutl rdc of 111 nt/d as shown in Pig. 4 by the mnslanl slope of the plot
ul dlseutce between face :end cable as :I function of lime since inslallalion.
Inlcrsecliun of This distance versus (into rehlliunship with the zero-rlislane'e
line (when the mine face undercuts the cable) shows That the cable had been
inslalleJ fur some •1811 h ur 2(I days. Simil:u ly, irate rscctiun with the zero
lime line (whcu the ethic was installal) shows that Thu advancng none Clcc
was some 15(1 m (5(111 II) ;nv;ly from the cable.
Gculul:Y
A 7G.2-nuu (3 in.) di:uncler hole w;ts wire line cored to characterize the
overlying strata. Illinois Stale Geological Survey personnel (Mclutcrt cl :II.
1992) visu:dly lugged the core and the hole was grnphysically logged ("Geo-
physir:d" 1991). '1~6ese geophysical lugs Then allowed estimates of ruck
density, purttsity, shear modulus, Poisson's ratio, bulk modulus, and Young's
modulus to be computed. Inslntmcnlaliun details arc conlaincd in Appen-
dix I.
Major changes iu rock Iypc arc found in this cyclulhcnn geology, which
is typical in the Suulh Illinois coal basin. Por insl;mcc, as can be seen in
Pig. 1, curd scants al depths of :48, 107, :end I IS m arc overlain with 8, 16,
:uul 8 m of shales, respectively. Pnrlhernutrc. Ihcsc ch;mgcs in IilhologY
dcscrihcrl in Pig. 3 col relate with lucnlizcrl dcLmn:dion shown iu Pig. 5.
Specific nwvcntenl was dclcclcd near the 0.2 m of Iimcslone al 3(I m, U.7
m of inlcrlaminalcd sillslonc ;utd s;utdstonc ^l d0 m, ;end 0.1 m o(limcslouc
al GG nt.
INTERPRETATION OF AESULTS FROM REMOTE POLLING
Inlcrprclaliun of ~1'avcfonus
Pig. 5 presents s:unplc TDK records arranged by date and lime (increasing
lu the right) and ilhtstrncs signature patterns Ih:n occur prior to severnncc
as the face approaches ;old moves past the cable (neg:rlive values inrlicalc
Distance past the cable).'I'hcse records show that strata nutventen( sheared
the c;tblc producing the Icfhvanl signal dcflcclions, called rcllccliun cocf-
ficicnlsmarked ;ts (a) in Pig. 5 :end measured in millithns (nip). -these
reflections increase in amplilurle as the lungwall face advances bcforc strata
nu,vcntcnl severs the cable which products the open end marked ax (b)].
Additional shearing Is also dclcclcd and is nlarkcd as (c). Prccrimpcd dis-
rata talc