Document qdRV2XM2x075mbYj7MKXREjDn
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State Uinins Engineer, ? ::ines Deportment, PERTH.
2CtJi July, 1562.
Ventilation Herort - .7ur.e, 1962.
Herewith, in triplicate. Inspector Siasons report together with duot counts,'
Other than the usual irregulati&fc -found, conditions
rerc fairly good except at Australian Blue Asbestos Ltd,, end at Ravensthorpe Copper i'ines.
The overall dust counts at Australian Blue /sbestos arc the worst I have, seen. There is no d.-.ubt that in general
conditions underground have improved, this being due to firm action token by the Inspectors, ,,`ve still have, however, the hazardous dust problem, end this problem will remain whilst present airing ECthod6 continue. I have written to
the Manager of the L'ine, requesting the abolition of *under hand*. stoping;- a co;y of ay letter is attached.
Bust is no doubt still being produced uj-derground but the high counts found on the lost inspection or.*, not 'o' due to underground mining operations.
r
You will notice the follo'd-i, cc
19.6,62, Day Shift - Bain Adit Bench,
650
19.6.62. 20,6,62. 19*6.62.
Aft.Shift nn n ft nn
- .'tain Adit Bench ft
650 1C00+
Transfer belt Uiin /dit
660
Ho.6 Ross Chain feeder il.Adit 720
18.6.62.
Ho, 3 Ross Feeder ``a in Adit 650
Transfer belt Esin Adit
1000+
19.6.62.
7 level Transfer Grizzly
1000+
It alii be realised that dust is entering the olne from the .1111 via the 'tain <`dlt and that du6t is also being produced from Cre ter.sfer points in the Adit; this air continues through the underground workings,
I realise only too well that until such time when on effective dust collecting plant la installed In the `tilling section we 'will hr.ve this trouble but the company hr.e under expert guldenee, eonstrueted a new pilot plant for dust collection and is In the process of testing this pirnt, 1 feel therefore that 1 oust be a little patient with tht aillln:. Soction.
There ore however several points where dust is produced and shore no effective control has been undertaken. I oo instructing Inspectors to stop work ot any of these points until the aottcr is reaedied.
I am without doubt losing .patloneo with this Cocpany. JM1 our Inspectors hove gone out of their way to offer 'assistance to this mine end I oa beginning to think that 'this hou been token as s sign of weakness. All kinds of proaipea hove beer, aode by tho Usnogcacnt but very feu ful filled.
Inspector Ibbotson and ayself both feel thot oe have rocehed tho stage when we ore ofreid that our peroonal disgust' could eloud reasonable unbieseed interpretation.
Z hove alroody told the manager thot if he does not fulfill his obligations, I personally rill Initiate prosecutions against hia.
I must await results of the present dust collectirs teste, but if they ore not successful, or if th.y are success ful and work not put in hand to iaaediotcly r.etty :*ll4.f<;ct& 1 will be both sorclly end duty bound to close the dire.
Ravonsthorpo Copper Hines is mother problea, but now that tho Hino io to continue productler, fira action will be tekon to reraedy defects..
SEI'IOB U7SPHCT0S OF HIKES
Sfc.to Wining taclnoor, limes Zapsrtoort,
l.tft --ly, i,,C
Vcntllc tioij `liotrolisn flue 'cbcstoo J,tu,
Color.!?! ?!lrc - -lttcreoa.
/ceofaponicd by /ooietani Inspector loxton 1 carrie on cn inspection during 'both day ft afternoon ehlftc of the ainir^y & silling opcratior.c, A eocplctc oirfloc survey ace alco carried on, Tho opportunity nee token to caapcre the tyndolloscopo, kirdly^ooncd by '"cotem lining Corpor.tlon, oith our koniaetcrc, Ao yet the rc6ultc have not been eollotod, but once coeiplctod a ceccrotc report sill be forvmrdcd.
Vicuolly, conditions thr-aigbeut the sine generally have deteriorated considerably since ay loct vicit. The race Oust counts ero high, porticuIcrly durijjc r-fte:noon chlft . then ODoko was oloo visible plus the oslroue orcll of fusee. As c:r. be seen fros tho figures belou, Uic. overage count .for dey ehlft lo tho highest ever.
Tho following figures chew the r.v'.-.i, e u.t c-un.
i-LCordcd ever the past too yoorc ft Ulucti' lc U'/. ' r-c conditions.
Dnoy
Shn ift
fo r
June, . ovcGbor
i96 0
*t
t August * -'arch
1961 1962
nn
June
1962
fttcmoca
ovesbor I960
n n A'UgUOt 1961
n .Juno
1962
23C .c. 15^ pp*cc (<
sJC p,;;,C,c, 270 p.p.Cc, h90 p,p,cc. 110 p,p,c,c.
630 p.p.c.c. 990 p,p,ee
utti break)
The underground employees A sur,-. rvicoro op; c:.r to hove nt loot been educated in the correct uso of the vent
ilating, o;-.lint ccs,Qlco the obr,. rvov-ce of the *'irec reguletio: '>ct gCJJCJxjly,
The rein edit, or.c ogai!:, ie caucis:r such tr.ublc i :< rd to tho dust hrsc-rd, rust counts taken ot v.-riouc tire: during cur i,-:.section resulted in on average count of -`r5C pp-
Tho cause Of thio tould bo attributcoblc to the no/.-.rtivc
;irfloa through tho adit below `.o, 2 level, 10,CC0 cusinc
ccia found to be entering the coir, edit nt the curf- cc, but nl
hod leaked into the loner ccas cu:-cult on 'u, 1, 2 ft j level:
The oi'cn botrxen : v,c 3 ft 5 levels oca found to be 'dead*,
a total of 6,000 casino cere leaking doon through ?*o, 5 A 6
lovele euifleo riucu into the sain edit : thanes passing. to
*' 7 level order tho irflucnco o.' o
;,,J\ cftlch exhausts
this air r.lorv; `o. 7 level into tho otepo e;-cte. c...cc- tho
leilxfco oru rectified it should bo poc-cibi. to
t.-u rir
Ihr-uJja the edit frer top to bottoa, thus :.ii . ir 2 .. km
r,?;ry c y dust gcn-rsteci nt veriouo ;/0-;.tc .
..t.
2<
. \
The etopo drlvo ;ro^ntano 1c no- v.cli i on effort to epced up thlo pro^rosac cost stove . r.vco ... . being driven oro 6* high x 5' ride irate?/- si' <`c.- ci; 1 r: of 2u* oido end 3i* high.
It lo nou rpesible to boro, iiic . e-r* pc :x* 5 * cut i or shift, ufcich givo8 an cdvus.ee of 11 feet .or day ru '-.oinot tho previous acthodo otivanec of oppres. 4 feet ::cr da;.
j> t' lbcos continue to be c-`o urteLiTventilated eitfc Dy/fi eooordory o pliatcc, Civon orothor eonth or oo tony core ctepe drlvo connections oill-have boor, ofvoctcd-thsin-clTlr-p tho-preoeft^'arrclrai-ariwi caeh hotter dcanoirc of. cot ' particularly noticeable should be tho Lrprovou conditions during afternoon chift.
An interesting point 1g in reerrd to tlr. dent counts recorded ot tho oeraper positioner These oner- tore ciuuld hovo cood freoh olr because it peace direct to thss froa the intake crcns via . the various levels. The svcjvge counts sccor vero 420 & 610 ptp.c.c* for day end oftomoon ehlfte rec,.octiv It can therefore, be readily seen that tho ventilation officer ftos virtually eh iapoceible tost In cour.totactile the dusty eir.e atroephero txben the freeh air is polluted to ouch a degre
AIT!
Too Pichardoon 60 A.F. close A exisl flea fnne
eentinuo to provide for the pricary circuits, '/heir cc.t: mod output* lo approx. 149,000 cunina, of thin, bouever-, o 1/ eppica* 107,000 euraina is fresh elr, chicli ,,,;.. ar.tn flootivo f.eoh-clr throughput of approx. 7-1 *
Xm^: VZ.t.-CTr&)7? -
..............................................
This sous le eirviced by the :i x: ..
,, t tii
of 563* It cue found to ho forcln- co.e ;7,CCC a. i.. 1 le
tho oorkinno. Of this, hovrever, 3000 cuti - --.ere l^r-ki^ th o.
tho door positioned north of tho curfr.eo rluc t :c bol. reel:
In tod. A voluac of 54 *CCO cunlr-e le tho;'.fore bolng drr.cn
into tho siijo vlo tho surface rioo at 540. ''3ns officials
expect to epoed up thlo fen in the nosr future eo Ir.cr ete
its output to QFprea. 65,OCO cuoinr., chieh le ctlll cell bdoc
lto capacity. Because of the increased prtosuro difference
botuoon tho tro oeose, bo'sevur, o errattr sliort-eircuit could
cvcntuoto urdcso the brottlco lcakofcc art overcome.
The 57,000 cuaino poscing thr.Ui'h the .'an trrvcl Co.'.r !?o. 4 Adit and split t `-o. b levol. 16,500 cucir-s coin;: couth tt 24,000 euaina goire north. Tho rcaolrdr^ 16,500 cuuinc continues down T'o. 4 Adit to t*o. 7 level.
At present a door la cited 1?. >-o* 3 ,'Clt .just uuut
of :*o. 4 level, thus preventing the elr of the lorur levels passing to tho upper lcvelo. t- rou t.o; ition betoocn ou. 5 C levolo In "o. 2 Adit has b on prepared for tho door " iv. rill
bo rc-uitou in the rtnr future.
Tho volutes arr-sured cei'e sc follous:
433 Cliff Opening
rjchuuut
12,000 cuti.^u.
12s "
- 12,000 c-- 1 c.
TOTAL
24,000 vu'-l f.
lio. *j level Curfrcc iee 1:'v *"-* -f * _ ____
2..^ . "*
Tho remnininfl 30,000 cuainu {*6,000 - 2Jj,CC0) suet
therefore he locking into the loner ecoa circuits through the poorly erected brstticoo betwoen the too eeaes*
Ltrrr n::'--' cncnrrt
The prisery fan servicing this eoas ie situated r-t tt
cliff Koce in the upper ccax nt co-orde 630' * '} effective
brsttlue soo 100* 'cst of tho fen prevent lonto^e of cir free
the upper ocas Into tho f'-n direct* Zt see fxoxl to bo csivuoi !;<: oor.u 32,500 euair.c iron tho lover coos of etich w4.y 53Ccc cuslfffi 1 oro found to bo cntoMnp through the lntrko nr.'-; o* Tho 30,000 cuslno entering fron the upper ocos, oo t rcvicusly
explained, would give on cctusl intake of G3,0CC cuxIho to this circuit, of which, howevor, only approx* 6U% la 'freeh air'*
Tho voluaos scoeurod ve:c oe folios* .
hoIn 'dlt
:o* 1 Cliff Opening
r^* 2 "
M
: o* 3 "
**
?to. U "
W
Ir.teko n
M If.
11,000 cusi1 1.300 5,000
16,200 1,,,0C'.
Ti,T i.
1
Surface "cr
Exhaust
V2CC0 Cu;;ir.e*
w.:Pt/ Tt
Conditions ir. the nill oppe-ar eor-olotov-t ~itli pteviouc inspections* I-orticulsrly noticeable nt night r--e the dust hone surrounding tho rill ft adjocant crcas* This in turn ir. ent-.rirv: the sine atxocphero ft no Oout-t eontribut.'.o tcs*:rdc tho high Cvunts recorded* both und'rgr.-.und ft in the plru.t* Throe separate dust csur.to taken at the 3ir.o bcr-ch recorded 1000+, ft'6J0 pp*c*e* during afternoon chlft inspections / ona token after lunch Curing day shift fsv& a conccr.ti-r tion of 650 p*p*c*c* Two inspections we:o done, or* during day clifft ft tho other durir^j eftemoon shift* The ave-ege counts tsinf 695*-770 p*p.e*c* reoi-cctivoly*
Vt ego dust co;nts recorded fire eo follov-e:-
Overhaul Crushing Section
Juno
1960
i'optcaber I960
"oveobar I960
August 1561
ixcsnber 1961
'arch
1965
June
1363
3C0 p*j>*c*c,, kP.O
U60 " 390 ** 510 " 300 730 ~
3L:0 p.p.c.c. uzo hho 160
635 350 * 700 M
.'III.
5^0 p.p.c.c* WO ** UftO : 20 6.20 J.C t
Tho ova rgc dust count le ttw hi . t
Vi. ; to.1 -
Conditlona however did iht appear cr... crcc t.. :
inspection, excogt the or.c in .`Jorch, l^-.J* ..c. - : it
eaphaeiooa the fruitlossnes of tryin to ru _ conditions
by viounl observations only* The cVv.-ra dui-t count jv-cor^ed
in (torch woo one of the lowest ever* '"he r usoi'. Vchln;: Uclt
was explained in detail in the `torch ru;rt*
*/h*
' ` `iucii offort -r. ioney lo still bcir., i. .. t l.; i.
control the durfc at itc source. .'11 a-c : v.r^lc, ho ; v
because the auction in tost if v.ot r.ll J-.-vc- t..- x cc.
V.
* thcrcrorc incapable or dmuing li the ..ust . :o tbe u. t
collection unito; 7he unite oust there X'orc be V
*l
-usto, especially then one considers, the re -y t of ;'u. t iriv-
cxhnucted to c.-fioo heix- fron thee: o c _j:til ilu sc rrc r .-J.vcc.
by o non? efficient urrcgczont littlo or r.o ir.Ti'ovtIn cn.- 'iitiona con to effected.
i t prr.ocntc?.. crlrscr.to .-re- bci:y r.ructorl with
o pilot duet collection unit of the tag filter t^.-yc. Tlx brpr
or oockn conoict of n j.ylor Xhhrle ttoraifretured ir 'or ico.
The oir.unt of tine we r.oro otic to c-ejjd et the e^pcriicr.ts
vuo very Halted, but r.evrrthcloce tx coined o folrly good
idea of the unite opettio. it design, -uitc runtcr of sunt
oaaplco cere obtained b; uc, but owing to excessive dust being
lihCThted curing;'curtoi . operations thus ducting up the elide,
the first elide had to be discorded - a nee caapling plon forsmlrtcd. ?'ivo soto of ccopies were firouly recorded rt
variouo intervolc. so
odou.
t>o unit
on-'-f-tl: ~ cn t- 2. Iv.u: cycle on tlx dry
of r-.jp r, xiivp-# The* cycle vuvjriuc-i t. avczl uu::t cxtr.ctic
for '2 h uro ?? vir. ixc -, the ru^v- .* j' ;ci, uto belnr used to
coil* tc c-teli -'i; srn ever*: the
*il .'jeiritioftC ore
-utoa-tic ft*:: he v-rric-.* by sit: sv* V.< ;* ileus aettl: s.
5 60 75 105 120 175
slnutes eCtor collide
n it
D
tt n
t
* ft
n
t t
t
n it
i
670 10 a/C i:v mo 210
(l.c. 5 ainutec before neat collr;.:c.)
'.v.e.u.
.'ltlicuyh the rosultn do not epperr lapresolve ::t first glance- it icrr*;ocnto o tr-rrxndeue laprovcncnt ovc: the prase: t itotoclor.co* cyotca. /loo to be reaca.iuC is th technicians conducting the tecta ore vir<uolly c?;'^is.<:/-in, ,
r. until tlx tests i:rv conclude*! & all ^oto collected, the
oiove results ore of little use except they do ivc suae luce of the units efficiency. 11 i.srticleo in tlx dust aacplec oyr.curcd to be lees tlx:. 2 aideno. The high arjrrl c recorded i iruteo after collapse c;:uld be ignored because i; the ctucl full size u; it tliO dust libO'tvfcfifJ durinr colls: GC "iil tv ;;;u-c tlirough otlicr br.ee ccllcctod befor being eivcisr: ::1 to f.taos..hcru.
Cor.Titlor.c tlir.uf.hout the sine froo the curt or-; 1c
would be et their worst, in i'r-ct the stc a; c ci.un. for
shift is the highest ever, '.`-her- the onount of nur-t peuri.;
into the sine with the freoh sir is conoidcttd, o. c :
whrt c bopclees task tho uniercround p*.i-aor-ci Irv-. i, c . b ti
the hacord. Ono fcela, however, thst^ruch r.o. ,ccut_v-
c
could be t^kcr. ir. the alr.e toward reduciJi. tl.^ u. ti
. .. :
Sose ocboutou van seen In oil u:r;c?> end jsucii fibre tr-c seen In tbs treatment cS l. portieulnrly tlio gill ctctlor.. The ir.-.i:. .1 -< bench clue revenloJ fibre.
The o^;:c;i-cntcl wtopin." bloch :
still, /ftc chet apycfired ertirf-ctor;/ .rocj-ett
halted yillnrs etc >-oa btir^r cut, *lw rair . *,
this aovo is rot kr.otm, but c.uifi be n nfrt in i;
for tho bulldozer trlo'/.c.
Good eo~o.':i^tion still csiota bctv/con us personnel* but it is felt sort positive setter ce ;l. rlth the vtrlouo projects A probleao.
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