Document 65yxQOBBn31wmbpM064aBZk5m
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The lUnager, Auetrellea Blue eebeetoe Ltd., M?r&9a.
KALGOORUE. S?tb August, 1"
Bear Sir,
Atctted Is copy of duet counts end twpsr*tores recorded iu ua&ergreued eoehtus Plsese st yew OeleeAal sl BlttABoen aiest, AIo sbe result# of Bunt cone* tekea in the treetnteot pleat.
Yeu will observe suet the duet oea&ta ua&erefoued ere very high. these ecuid he lowered by eoeurlag thete greater vt volutao of fir is *de to floe through the wortlog piease*
o.l Bou&h Brlve Fluctuates (ay even reveres)
Ho.-H South Srlve
Bo*3 South Strive 27.000afa
, 60,700efbu
eitteaeoa Blast
Ertieuat (aesaared pee* fee) Zeteke (through cew portal)
50&$efa 3?.SCcfa
Air is lee* through the doers le the YolioeUg g*&titlee: *
through door to U8l Creeeeet 3,l?0afgL
* * 1200 Croeecut 6,1*30
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* ifioo Crosscut 9,100 *
" 2000 crosscut
" 9U00 Oroeeeut
leer$cs 2,200 etc to ventilate the 2702
270* fisopee.
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Yours faithfully,
nrereTCT
PLAINTIFFS EXHIBIT
y?xsm7
^ MTHfS. WV-004027
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gtite Mining Engineer, ulnae tepertseat.
10 WOOOCSLIB. 93rd August,
2 visited fcitteaooa during the period 23th to *7th
end in*pi eted eodergroufiA eorfciag piece* at both Colonial
sad lUitenom inaej nsde umacM of toe e*ior*irflo**j i
inspected eta secured dues eeeets is tfx treetoeat plant- - A eapi
of tbs uarih eat <U*t oouate recorded st toaee-please 1*
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The 9}prity of the ore it oow betas roa fra* the Col
onies aloe where about 90 asehines ere sagged on stoning opera-, tlone. Those anehinee break the ere on one Mft eatl on the shift opposite to the neeninee sorepers ere used to close the fact
ad aeve the broken ore into the passes. The ratio in spproziaet one scraper party to too sachinse, OevelopMat is esrriod oat hj
three perries, end appears to be lagging behind. At the ittenoca Bine the operations ere taw purely a * sslvsge bsels. six
serrper perties see engaged lee&jeg tbe broken ore fra* eeepes this l* expected t b eapleted by the ead of the current month.
Air ageevreatenta; These ware asd* using e van eoemoneter end resulted:
Colonial Vi&e s Extouet
&S,500cfn.
* intake through Asia Adit 9g.75Ccfm " through Ho. 2 South Drive ?2otuea
(o*y even revuree) * " to.J tooth Drive u,9S0efo.
(Fluctuates)
* . *. .JCo3 .South price-97,flOPoftnw
t*SrXSte&V
~--ftETOocfa.
K.B, la previous reposto to.2 South Strive ead go.3 South Drive have been referred to oe to.l Cliff Opening sod to-8 Cliff Opening reupeetlvely but the as* title* are these so* adopted at the sice.
The above figures for elrflo* ladleste that a large el4M of #lr is easing through the mine, tih is oorrset, tat the petp the sir teles la variable. At oae tisw the velocity of the
eir enteriofl through the aeia edit is very strong, whilst s abort
tiite 2s ter the velocity Is preotieelly negligible ead the eir oast be emeries the sloe through enolher opening. The etme* throug; the to.2 South Drive to very easll ee en iotsfco end st tines hst
been soeeured ee reversing. Xa feet there is no positive sitfi*
through the Intake opening* eod no eonatent p*t& that the eir ado* The cause la attributable to Che sir corrents in the gorges sad el<
the sella of the gorge- So order.to leprove the sirflov it sill i
nec*a*ry to lnetal doors, regulators, and feus to indues the r) ooirsd elrfloe. The attention of the alas esoegeeasat see drsen v
f this ns ter. ee eel! se the need for toe sir to be prevented fror*
short elftalting directly tc the **la fen rithout seeing through \ sorbing plscoa.
The fen inducing the *imo* ie * 6Qm Axis! no* feu io~ stalled at *o opoalug to tbe aloe eorkiag* on um wetere cliff f< 5CO feet north of the aeln edit.
uitteoooa Aines Itoemt Snteke through Me* Poreol
50.695c2 33,6&0cf
The diecrapeney betseea lotske eod Ktoaustad olr is 17975afit.
Meh is probably being snort siredted to toe ta tfcresgO tne ixt-
effective seeling of elu edit stealage, *<ui e poor atesplng at tor
To it*elf. (
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for the saooat of eork proceedina 1a tnsa aloe the 32,650 cubic feet per minute entering the nine la adequate eltheof Aoro air could be b*<U to extend to the betton of the sloe to vent ilete the S?0Q #topee. Tne leakage# through the doors does isprove oooditlcBB in eoee elopes, The loeeee through the doors at tabulated beio"i-
Zntwke through eee portal.
Loet through door So 1161 Crosscut. . Loot through door let 1200 Crowacut.
PloeCoae 1169 Drive,
boat through door to 16CO Croaeeut. PIor along 1360 Drive,
teat through door In 20G0 Grossest. Pie* along 1160 Drive.
. teat through door in SiiO0 Croeaeut. Plow along 1360 Drive.
32,65Gcfs. 2,120 6,u3C "
23.300 " 9,100 "
lb, 000 *
5.^00 "
8,600 * 6 600 2.200 "
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fhU 2,20Gcftn floe* to the 2700 atopee end Iclolog with the ether air evenWall? reaches the exhaust fan by way of old worked cut a topee eto.
Duet Couatei The attached figures appear to ree to be )i verr high for she underground workingB. Vhilet 1 do consider that attention eould be given to Isgsrcve the air circuit through
the oioe coalition* underground war# eetiefsetery end it evidenced by the wet eeddry bulb temporeturea, compressed it--water Jate era supplied at the era paaaea into which the era la aereped. During seventy five percent of the time 1 spent at the Colonial nloa water waa not available due to the mala water pipe te the min being brokea. fiiis caused boring operations to be suaoanded but did set affect the ccreplcg which continued Lrreapeotlve of water beioo available or not, Pitb the instruseat, used for taking' the sample of dust, there is a tendency, particularly in a dusty stoo*phero, for future section* of the glass slide to be pointed. X feel thee that the results cbtriced under these eosliclone for the duet samples ere sot e true indication of the dust casteat of the sir.
Treetaent Plson little visible iepreveraeot m evident to the extern*! eppesresce of the treatment plant. However such 1 being attempted to so endeavour to improve the dust collodion. That aeotioa of the plant which incladaa the holla. *x&>\t breaker aed aoreena Ms been totally seeloaed and fitted with exhaust duev which connect to dueting leading to s Kotoeioa* dust collector. This duet collection appears aatlafaetory. Another Rateeloce uni* la installed but aa yae haa net been paraaoantly eeaneeted to the roof discharge fros the fibre collecting cyclone*. An inadequate supply of power was given as one reeaoa. Shea eooneeted e great laoreveoeiit la expooted. FeBsdatiese for a third Botoolooe <Uat collector have been eocaacneed. it la entlolpated this will eahsm duet created et the crushing units inside the plaot bonding.
Plans have been prepared for th* construction of a new tree teent plant at the Colonial nine. aulldczera were in eperetlf leveling out fill for tne fomOaiioe tor the tits, mt Bign clevatioo of the entrance to the sine en the gorge face, ami tne fall into the valley of the gorge should aaalat lo the plant layout. 7i first mnatruotion antielpaved U vne icmtallatioA of a conveyor belt In the lower tunnel, to convey the ere free tha nine bio, to i $*v crusher, thence to a dymona cruaner end to a storage bin. w ore win be earted by truck* from thte bie to the tree Meet plant titieooon gorge whilet the remainder of * pleat ia cone trueusd.
Oscerals At preeept tne fibre belag recovered la lo the vieSalty of 1000 too* per four weakly ptriM and a.iia froa tne treatment of 17,000 tone of ore. It la envisaged that a tonnage of 410,000 tone of ere per four weekly period will be *tail* 4.
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TtvSs niil call for inereaeed jerkin* etopee enddevelecnant *U1 have to be etenped vt>. All la ill require swjwoTed venttlail end ooaoibly tfle sinking ef a ventilation eneft Ftoa toe top or tt\e hill iil be oecoaeery sooner tn*a i# a sue ip*ted at vne
aooenl.
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TABULATION OF DUST COUNTS