Document EdknK6ZNXDRpVqLMZYpOOQ0EL

jr**' PRODUCED IN MATTER i fiARROW V. MIDALCO NO U48 OF 1987 PLAINTIFFS exhibit 4_uax>__ PlAINTffF'S EXHIBIT CSR-46 ftiffg maj ! PRODUCED IN MATTER OF HtViV MIDALCO NO J16J OF 1987 14th Deeenber, 1943. TSIT TO ASBESTOS KILL. ZBgBAN - TffiffanffiR, 194a. 0 3mo g & (j 8s wEIl |b 4c5J .c 3% lil ^ a.s g sf Th sain difficulty at the Bill until just prior to ay arrival .-had been to aspirate asbestos fibre .Voo the screens without also aspirating grit and dust* 1 few days before I arrived, however. Hr* HcRoberts h*-d erected a troaael in front of the main aspirating screen and this screened out Dost of tho fine grit and was a major laproweaent* < Other alterations Bade during the period of my visit were;(1) Extra buckets were fitted to the main elc.etor in order to increase its capacity* (; Two extra hammer bars were fitted to the Xublt Hill and this machine was speeded up from 900 to 1600 r.p.m. (3) Adjustments were Bade to the Gyratory Cruc*..r to enable It to crush finer and a new eccentric bush is being ordered for this machine to enable it to crush still Bore finely. (4) the size of ore fros the jaw crusher was increased in order to prevent asbestos fibre being overheated *.j.d discoloured In the drier. (b) The use,of No* 1 fan and cyclone to aspirate . e**flbre from No* 1 screen was discontinued as the small amount of fibre collected at this stage was discoloured i.nd this (6) The was reversed in order to use the 1A fwf A. unworn side of the hammers in this machine* KJif The sill is running quite well and with the above alterations appears capable of producing frb'af now on about v- S tons of-asbestos per day. The asbestos is fairly clea*,;; and roughly equivalent to grade 4K. To increase t:.La PRODUCCD in matter of BARROW V M1DALCO NO 1148 OF 1987 2. F.TOD- .'CEO IN MATTER C. Hc.VoV MIDALCO NO 1161 OF 1C87 capacity, Additional plant will be required but An estimate of the cost of this has not yet been made. a the mill has been veil erected and Ur. HcRoberta has-done a very good job. This is particularly 'creditable as he has been without adequate assistance and in a locality A where weather and supply difficulties have been moat severe. --------- -------- ---....................... -- ' C r- c> CQ -O ; in U. \-.7-s "*2? rl It is not possible as yet to assess accurately the prospects of the venture as these are almost wholly dependent on the mining side and this is the side to which careful attention must be paid from now on; Here also, additional plant such as hoppers, flying foxes, tiwcks, etc. should be provided immediately, 1 consider, but an estimate of'* the cost of such equipment has not yet been prepared. One major difficulty we shall have if we wish to increase production by working more.than one shift, or if we wish to instal new plant whilst maintaining production, is manpower, the Test Coast district of Tasmania is very short of men at present and I understand men have been taken away even from Ut. Lyle to assist with the pioduction of foodstuffs. Ur. A.. Hander has promised, howevoi, that he will advise the Tasmanian Han Power Authorities to accord our asbestos project an equal priority with food and timber. For record purposes, a copy of notes taken whilst in Zeehan, also a copy of notes I left for Ur. McRob< rts guidance are attached. Portion of the attached notes deal with a visit to the Ut. Lyle Co. and I wish particularly to stress the cw and co-operation uisplayed to Be by each officer of this Company whom I have met. PRODUCED IN MATTER OF , BARROW V MIDALCO NO 1146 OF 1QK7 PRODUCTLD IN MATTER OF HEYli V MIDAI.CO NO 1161 OF V.67 10th December, 1943. NOTES TOR HR. HCROBERTS. Ye should consider now that the asbestos min is definitely in production and hence should be operated each day just as any other working concern* In ether words, the sain object now will be to operate continously and to obtain anil mm yield and production of good clean fibre. .She question of additional plant such as -Junto, trommels, rolls etc. will be taken up by ae on return to --- Sydney, but in the aeantiae, you should gradually go urtil sh ssi *mprp*to&** bitora r- t ssa--s-i------ ----i------ --------- --- * t fnf ------iiMlllms faif If this fan proves to ue too aaall, please advise us. Also an elevator to return overs from No. Z screen to Torrey cyclone should be erected. \ Ku^ Ua-*e. As regards aining, at present the supply will continue `to coae from the spur and from the aain hill near No. 1 uJU-.tW' ** ^ tsjol tJW tunnel (by lorry), when the apur is exhausted and I will `take up the matter of flying fox, hoppers, trucks, drying // sheds etc. in Sydney. The traa around to No* 2 tun .cl should be continued as labour permits as this will Kiovlde (J -1 t? , C?C0 i?jv a good place for dumping barren rock. .You shoulc obtain a firm price for the flying fox at T.A.T. As regards the mill, it appears to me that the woven ## 8* m c./'dv wire screens (particularly the fine types) and" the hammers in the Torrey and Kubit will wear rapidly and you should ensure that ample spares of these are kept in band to avoid n.... LD IN MA LK CF HARROW V MJDALCO NOTES ON VlSgf W gfetS&N - DECEMBER. 1343. PRODUCED IN MATT" HiiVoV rMr > ( NO UC; Or *; .. .Qa.Saturday 4th December, I visited the mill a*.d tooK ioit photographs of the slXX and of the hlXX from variousjaspects and aXso ran the pXant for a short period with ore which was in the drier. The gyratory 4 crusher was not working, but Mr. McRoberts is to reassemble it and get it back in working condition jeudy for Monday morning. The whole plant is rather dusty but 4A^MMHPwppnMaas unbearable. Clouds-- of dust rise so thickly that the machine cannot be seen. From what I saw on Saturday, I considered ip w.-.s not 4 ^x.^l^^^orthwhlle aspirating from No. 1 screen as A* y <i , here Is short and discoloured and hence we Mi UL- (iW* |*/ ^ Mr* Howard, Timber Mill Proprietor, took McRoberts *Q and self to Renlson Belle on Sunday. The mine at Renlson Belle is Renlson Associated and this mine has Just requested a loan of 5,000 from Government to instel more plant-* They'4*" Intend replacing stamping mill by rolls es they get too much sliming* Mr* O'Dea, the Manager, did not know much about rolls as he hod never used them but said Ht. Lyle had 8gj* 8 recommended them* Z asked him about wear on the rolls and he said be believed high speed rolls wore rapidly and corrugated hut low speeu rolls were better* He was installing 05 low speed rolls - 30" dim* x 16" face and running 27 r.p*m. y-S 5 .o Be said Electrolytic Zinc at Rosebery had a couple of pairs of Allis-Chalmers rolls - high speed 30" x 14" - which needed doing up but which were for sale* Re said the difficulty of using high speed rolls as slow speed rolls was that pulleys etc. would not deliver enough power* Mt* Lyle had told him that the best type were Cornish*'roily with //# <9 * O HCuDUCIiD IN M/M'l i.; i ;| BARROW V MIDALCO -2- NO 1148 OF 1987 RRODi 'CLL> :> K\T HEVG v i NO 116101-1 high belt speed end then geared down to low roll speed* ...Atrthe old Tasmanian Amalgamated Tin mine at Renlmcn3elle, we Inspected the air compressor and receiver thab-me Atave purchased from Mr* Howard* (Hr* Howard purchased most of the plant from this mill.) Also ae flying ex which he offered to us is Installed he -e. The air compressor Is a BS3, 8|" bore x 10" stroke - Broomwade Machine Ho* 38576, pressure 100 lbs* per square inch* It was driven by a 45 H*P* 1440 r*p.&* motor (a.G.E.) S*C* The motor d.s not being supplied to us.7Vee belts used for drive* The machine delivered air to workings several hundred yards away through a 8* pipe* The flying fox seemed rather small to me* Jhe bucket was said to be } ton, which for one shift per day at the mill would mean SO trips per hour. (Bodge said it had made 70 trips in two hours, l*e* 35 trips per hour)* To operate the mill 3 shifts would mean 60 trips per hour which it could not do* Visited Henlson Associated new mining face* They commenced taking out by open cut but had about 15 feet or more overburden and considered lifting all this to trucks and tramlng out end tipping too expensive. They have now driven a tunnel some 30 feet lower, with rise to surface and they remove the overburden and drop it through the rise into trucks below for taking to tip. Saving in cost seemed very doubtful to me* General practice at all mills 1 have seen and been told about is to have air compressors at the mill not at the site of workings* Kenison Amalgamated have horisontal- L.gersol Hand compressor roughly equivalent to our 023 and they take air about 1$ miles to mine by 4" pipes. Monday. 6th December. Telegraphed Jacques Melbourne to supply, an,eccentric PRODUCEDIN MATTER CF HEY3 V MIDALCO N O I1 6 IO F T .J? bush wearing.;plate for our crusher -s it was running without one* Also asked then whether it was practicable , fj for us Tto use an eccentric bush with only f* eccentricity Instead .of present in order to get finer crushing. 1 The plate is to be forwarded in one week and Jacques i answered they recommended a bush with minimum of i" total .. travel eccentricity. They considered anything less-than * this would femdly reduce capacity. However, Jacques &i c, to enlarge spon this in a following letter. At f total a , movement the movement of mantle will be g and this, ith good segments should enable rock to be crushed to i" maximum. Arrived at plant about 10 a.m. but men were still busy finishing the gyratory **'V- unwrwiinin MM j ,a* . ............ .PSvUDLUi) i.N.............. BARROW V MIDM CO NO I MS OF \% 1 .. # sh <stc f *8 Commenced running ore through plant at 1 p.m. ' The ore was just as excavated, l.e. no picking was done. The jaw crusher operates very smoothly and takes readily any ore which will enter the top of the mouth. Some of the ore is as large as IS" x 10" x 6* and some as fina as 1/6* nash. The tonnage into the mill is estimated by the number of trucks brought In. Each truck (and tipping trucks) is called a "half ton truck" and is SS* x 85" x 24* deepi One was taken at random and the ore was bagged and weighed. The weight was 9 cwt. 6 quarters 14 lbs. l.e. 14 lbs. short of | ton. The ore was damp but not really wet. It may li&ve had 5% water in it. On the above basis our ore as delivered to mill gives S2| cubic feet per ton. The drier runs very smoothly and gets very hot but no means of measuring the temperature is available. The fan on the outlet Is out of balance on touching on one spot and -vibrating rather badly and Hr. HcHoberts is to attend to this Be is also to fit a butterfly valve in the outlet stawk. In wet weather when ore is wet a high air speed through drier can be used but on a hot dry day like Monday, t. e fan g? i2S-0S* a. 5 W Sit,* *8p 5*e* oSP"r-frc &i 8.= & a.\ PRODUOXJ'iK MARIK OK BARROW V MIDALCO v NO J14B OF 1987 4. PROO'JCHD IN MATTER of HEYS V. MIDALCO NO 1161 OF 1987 . 3 car < Las msfcesto# fibre and dust out of the drier* Wood Iocs m.ttnt in the drier and combustion it quite food* normally* About"l ton per day (at 15/- per ton) app* jxlmately, delivered mine, is burnt, but on wet days this increases to about -&?tons per day* Loose asbestos in the drier it discoloured due to heat and hence we should not aim to 'I crush too Tine before the drier* The'ftrommel after the drier has 1" holes and rotates z at about 1&-20 r.p.m. Approximately l/3rd of rock goes 7 through the trommel and by-passes the gyratory* The trommel runs eery smoothly and gives no trouble. The gyratory erusher runs fairly smoothly but. at present does a rather poor job* The segments are belly worn on one side and with the mantle set to touch the segments on the good side there is a minimus gap oi about 1/2" on the other side* This means that with the movement of the mantle there is about l" gap'on one side of the machine through which the rock passes* This is aggravated by the fact that the machine Is not being fed to capacity and hence Is never choke fed* Also the mantle was revolving rapidly throwing rocks around until they found the largeat opening to drop through. We stopped the mantle revolving and diverted all feed to the unworn portion of the segments and got better results but still not good. The mneh^ne needs new segments properly centred and less throw. The action of the machine Is good, however, as It Is a cracking action and hence does not lead to excessive wear* At this stagv we should crush down to about I believe* 1st Screen* Fibre Is apparent at this stage but it is not necessarily the longest fibre In the ore and it Is almost Invariably discoloured from the drier* Zf collected separately, this bad colour is very apparent but if taken in with the asbestos 'H liberated later it cannot be noticed* PRODUCERIN MATTER OF . BARROWjV. MiDALCO NO 1J48 OF 1987 5- PRODUCCD N MATTER OF HJVJ V K1DALCO NO 1161 OF 1937 r^^rc this ruo no rt.br* was aspirated from this scrmenm&fi hence the screen acted simply as a screen to a remove Takes and as a conveyor* * , :lhit screen is nosi- Sop Deck - j* opening w* a* wire} 2nd Deck - i* boles in plate; Zrd Deck 20 -cib. I estimate that 6/lStbs of total goes over top deck, 5/12th% over Ho. 2 deck, 2/12tha over No* Z deck and 1/ietb goes lrough No. Z deck to tailings. Of the overs froa top deck, most material is } or less vlth a small percentage up to ii. from the screen all aaterial except tailings goe*"^- r to tbe belt elevator running at about 200 feet per ulnute. Roughly made buckets are spaced on this about 2*-6" apart and this unit at present, limits capacity to about 6 tons per hour* At least twice as many buckets are required* Tbe elevator delivers to the JCubit Ulll* This does an excellent lob of breaking ore and separating out the fibre but does not tease tbe fibre. Very little material over remains after this machine, the bars of thi*__ machine are getting worn but not badly so; tbe llnii*g of tbe machine shoss no sign of wear. Inc machine is uow i-unnlng about 950 r.p.m. Zt Is proposed to try this machine at 1800 r.p.m* and with two extra bars fitted making a total of 4 bars. The flywheel will nave to be removed to do this as otherwise tbe speed of this alii be 18000 ft. per minute which Is too dangerous. No. C Screen, on to which ore discharges from che Kublt kill, is at present:- Top Deck - i# opening woven wire; 2nd Deck 20 mesh. 1 estimated that about 5/l2ths of date-rial went over the top screen, about 5/lths over the deck and about 2/12ths went through the second deck to tailings. A fair quantity of fibre is aspirated from the find Deck of No. 2 screen (how much in the total is impossible to estlmote accurately, but probably something under l/3rd), tut 9 j. 'JIN MATTER OF `RAKROW V. MJDALCO i no U*8 OF 1967 PRODUCED IN MATTER OF HliYl V. MIDAI.CO hU 1I6JUIIU>7 4 laage-quantity passe* over without being aspirated becaiae is not sufficiently teased out. This screen appeew to buap slightly at the front end which makes it difficult? to set the hood to pick up fibre without x ick, as there Us a tendency to bounce rock up into the he The fact ^that the driving rod from the eccentric -l attached to the f&nt of this screen (whereas it is connected to the back of both other screens) may be at least a contributing eause of this bouncing particularly if the eccentric or bearing bushes are slack, from Ho, S Screen the overs from decks Nos. 1 and 2 drop into the Torrey Cyclone running at 1440 r.p.m. This machine teases out the fibre fairly well and breeks rock down to below 1/4*. It did not do as well as we thought it should and after the run the hammers were examined and found to be badly worn. The leading edge for about 4" from tip was very much rounded away, for to-morrow's ruh the Toirey will be reversed thus bringing the unworn side of hammers into play. The bottom bearing of this machine gets very hot - whether this is because of poor grease or because bearing is overloaded is not known at present. Heat cannot get away very readily from the bearing and we may find e circulating oil system Is necessary instead of greass. I think a spare race ehould be kept on hand, The Torrey discharges into e Trommel with 1/6" plate and then & 20 mesh screen around this again. This trommel screens out a large quantity of dust, almost half tha total tailings coming from this unit. The material both t.uough and over the 1/8" hole passes on to the No. 3 screen. At present this screen is as follows;- Top Den - 14 mesh, 2nd Deck - 20 mesh. , *** * Two aspirating hoods are fitted on this screen, one on each deck. It is from top deck No. 3 screen that most of -4 *--.*`. PRODUCED in matter of BARROW V MIDALCO NO l1*8 OF 1987 -7* PRODUCED jn matter HEY3 V MIDALCO *0 I1C1 0.*-* I-.J7 really-geod fibre is obtained, although a quantity (say l/8rd of* total) of fine fibre is obtained from the lower deck. * < material is about 3/16" diameter and contains a high proportion of unteased fibre. (Actually, this material was returned after the run and the Torrey made a wary poor job on the second pass. The material was still ^alsiy large and a large quantity of fibre still remained though an extra 30 lbs. of fibre was obtained by ,uitlng about 1} tons of the overs from Ho. 8 screen back into the Torrey). The material from the second deck goes to tailings. (About 6/L2ths of the total on this screen) and the throughs from the second deck also go to tailings (about 3/li:ths of total). Tor this run the total yield was only and the rate was about 6 tons of rock per hour. The fibre was very clean and of grade at least equal to 4K. The main reason for the low yield appeared to be the poor performance of the Torrey. e Tuesday 7th December. Plant ran for 5 hours Torrey had been reverse; All remarks made re Uonday's.ruh still hold except that the Torrey now does a much belter job. Material coming from Torrey was about half the sl2e of yesterday and much more fibre was teased out. The material was batter than after the second pass yesterday. In the oven from top deck of Ho. 2 screen, however, there is still a lot of fibre which must be collected as it Is of recoverable site. There is JJRODUOD in matht. of BARROW V MIDALCO - NO *148 OF 1987 PRODUCED IN MATTER OF Hi!YJ V KIOAI.CO NO 1161 OF 1.-7 also* tlty of fibre going out with the material from Mo. 3 Atrtti and with other tailings but X believe this fibre I is too etiort to warrant its recovery unless a mar^e. for shorts li found. 5 It-Snay be necessary to put the oaterial from fJr. 3 screen-*top deck through rolls to grind the rock to powder then to trommel this through a 20 mesh trommel and return the overs through the Torrey to tease the fibre out. the yield from this run was 4% and the flbre~w;:s~clfca&JH-- and although not quite as good a grade as yesterday-was still-- very close to 4S. The more fibre recovered the *lower will <5 & ' $!? be the grade apparently, as it is the shorter fibre on the k<% whole which is ^recovered". The total ore to the plnt was S5 tons in five hours, i.e. & tons per hour and one ton of *$ ife Hi * fibre was obtained. Based on the above run an approximate flowsheet of 6 tons of ore per hour is attached. A point which must be,watched is that the aspit itlng hood nxst be cut out before the screens are stopped otherwise the grit on the screens is sucked up intu the 4Jfr asbiestos cyclone collector. yV ?^*ew-*ep fJLsr ^` %-4 Jc than 1 must fit an efficient. ^oTltor in X believe we IN MATHl; r.F BARROW V MIDAICO NO J148 OF 1987 9- PROl K.JCU) N MATTOX C? HcV3 V l`"t>A*.CO NO ut; Of 1-7 H4>ieM eell+i t. **US .WW f &r Jr 1*** ' t, with tbs No. i c lUiwaai barnraitfli. . irrn t Bill withmit . dy?t ..-ly ovr a ac*en or fhut*| |fly *-4iat s* U sentttl JU'l 1UU1 l)U UntfSfl" 1 positions where Tine dust occurs, such is trommels, tailings, chutes, Torrey cyclone-^end Kubit oilIT,' to permit inspection \T xV / 1L Ifv when necessary and a teM^CA A Ho einh pmeititi ^A hinged flap should be provided at the end of each tailings chute to fit over a * tailings truck when one is in position. w 'SlUMbure *** **ar g^curs and in tola *ltO. -*-- >n*f co <u a . ad: 1 8"? Friday. 10th December. A run was aade on Friday after two extra hammer bars had been fitted to the Kubit Hill and after fitting extra buckets to the elevator. In one hour t cwt of good clean asbestos was obtained but losses were heavy as the plant was being fed at the rate of about 8 tons per hour. No. 3 screen was ov*..loaded and the aspirating hoods could not deal with the .juanclty of asbestos coning over the screen. Also much of the fibre was Insufficiently teased In the Torrey cyclone at this feed rate. Towards the end of the run the feed was cut down to about 5 tons per hour and No. 3 screen^, $nd xhe Torrey then handled the material comfortably. The two additional bars on the Kubit Mill did not appear to sake much difference. . BARROW V. wIDWX -10- r 3bd Cubit Kill was then speeded up to 1800 r,p.m, aud"ia-W little over half an hour 5 cwt'of fibre wa; obtained. The quantity of tailings from Ho, scre.n inczwawta considerably thus relieving the Torrey of unnecessary work and there was very little saterial going ver Ho, z screen top deck. It appeared as though the Habit was grinding about twice as finely & befo**.. 3t still did not tease out the fibre in the way the Torrey does, however, and consequently such unteaseu fibre vent over into the Torrey, This does not matter as the Torrey does not cut up the fibre. The runs on Friday were too short to get reliable figures but the plant will run all day Saturday, However, it appeared that a rate of, say, 7 tons per hour and a yieM of e> fibre could probably be maintained, thus giving, say, 2 to 2$ tons of fibre per day or, say, 600 tons per annus. Mining, Hr, XcBoberts and Ur, Hodge believe the drier will not dry the ore in wet winter weather without previous drainage and atmospheric drying. This means we may have to have, say, a weeks storage at mill and hence more than a hopper at the crusher is necessary. If we build a long hopper or drying shed on tho spur we oust then feed the jaw crusher by conveypr and if this hopper is in line with the building it will not be the right ang^e for a flying fox. It appears, therefore, that we will need eventually a long hopper running at right angles to building; a conveyor over this to distribute ore as it is delivered from a flying fox; a conveyor beneath the bin to deliver to 'the jav crusher, Jls the ore Is variable, in order to keep a constant grade of asbestos it may even be necessary for the hopper to be divided Into section*, each to taVe a dlfferent__grr^*-_QTe__ai^M 10*0 5 Xi. t> oo>> Dg-Js- u2 sit s1/5: i wJ oO. gtl S a cl 1-8 PRODUCED IN M.V* BARROW V. MIDALCO NO 2 )48 OF 1987 -11- PRODUCED IN MATTEROF HUY3 V MIDALCO NO 1161 OF 1.-7 as It is mined, with the object of mixing these ou Che conveyor belt as required. The quality of the ore on the spur appears to me to be generally equivalent to the ore elsewhere on *ne hill and there is no reason, therefore, why we should not take off the top of the whole spur at least to .he level.of the roadway at this point. After further inspection, 1 doubt whether then Is any need to worry much about commencing mining at Vo. 2 ' tunnel -- we could just as easily commence at the site of the He. 1 tunnel although we should still put in a tram line to Vo. 2 tunnel for the purpose of disposing of barren rock. Alternatively, a good spot for disposal of barren rock is the side of our spur nearest to the railway tunnel and by running the conveyor mentioned above beyond the bln, waate roc* could be brought down by flying fox, conveyed out past the hopper and shot down the hillside. Tailings. McRoberts and Bodge suggest that to save lut/ur involved in carting tailings to dumps (two men per d <y when.on full capacity) we could sluice tailings to dump. This would also Involve use of large quantity of water, of course. Air Compressor. It is proposed to instal the D23 air compressor and receiver at the aide of the mill building nearest roadway and near the lower entrance to the mill. Air will then he token to the workings by 2" pipeline. Mill. To increase the capacity of the mill and cut down losses, further plant which should be installed issAfter Gyratory crusher, fit a trommel- to -by-pas's * material under 1/4* and put remainder through Mublt Mill. After Kublt Mill put a trommel to take out all dust and put remainder over aspirated screen. No. 1 screen wouVi go PKODUCID IN MAT] .J; (;*r BORROW V M1DALCO NO 1148 OF 1967 -li- PRODUCEL) :N MATTER CF HtVJ V MlfMLCO NO U61QFK3? to this position* Prom the screen the material would go to a,_ ;t and the xlemalnder goes to a screen for aspirating fibre. The present Ho. 2 screen would be In this position. The remainder of plant up to Mo. 3 screen vould remain, but after*No. 3 screen, overs would go to rolls, then to tresael to remove all fine grit and dust and then back Into Torrey cyclone. -----------:,r Costs to date. Costs to date on rock on spur are as follows There is approximately 15,000 tons to be excavated, first 300 tons cost 200 on day wages and with expense of. removing overburden etc. Now men are as. 3/~ per ton (plus, say, 6d cost to us for air.) Bence, total cost 1200 tons 9 3/6 * 420w/- plus 300 tons (Total 4000/- - cost -200) ______ 1500 tons t0 cost 6200/- 5/6 per ton approximately. Wood. food is cut on contract for 9/- per ton * 60 cubic feet. In addition 1/6 per cord ( 126 cubic feet) is paid to Porrestry Commission, llr. KcRoberts estimates wood costa us 15/- per ton delivered at mill. Jn fine weather about 1 ton per day is burnt in drier. In wet weatner about 2 tons per day is used in drier.' Labour. Mr. Hodge receives 7.17. 6 per week (5/* -per dey plus 1 retaining fee * and has no particular status but is accepted as seeond-ln-charge by the men. Mr. Mcr.uberts thinks we should definitely make him second-ln-charge and ssswssr* AO^*W0F 19JJ7 -XB- prcc* rrr* v ma HKVbV MU). NO II610FMS7 :-; ta** next highest paid Ban is Tonkin a carpenter andkIiir who receives 7. 14* 6 and who was originally giBen^this on being in charge of 3 carpenters. Hext higfcttxt ^-s Bob Clark who gets 6. - par week and is claasllled, X believe, as a truck driver in order to give him ctfc^s rate. Be is a valuable Ban and it would pa/ us to give him more. HcRoberts suggests calling his Bill Fort n and paying his, say, 6. 17. 6 per week. * i wr The basic--industry wage Is 4. 12. - plus 3/- per week war loading. Other classifications' ia*Sfae Bill will be as far?**- X can see:- Jaw crusher attendant, Brier attendant (to be understood to do other work when not stoking drier), operator to attend to screens, elevators and other equipment (one aan). Tailings truck uan (probably two aen), Asbestrs bagger (one aan). At present the aen on tailings also bag and it would be handy to keep these two jobs equal xn pay. Kr. BcBoberts is to forward copies of all relevant awards to Head Office as soon as.possible. Other classifications such as miners, flying fox operator, etc., are already covered by award to which Br. McRoberts is working. Hr. KcRoberts would like to pay 9/- margin to crusher attendant, drier attendant and mill hand, and 5/6 margin to bagger and tailings aan. Samples. The following samples have been collected for forwarding to Sydneys- Ore Saaple ) JSame truck Ore Saaple ) Over Mo. 1 Top deck Over No. 1 Second deck Over Mo. 1 Third deck _______ Over Mo. Top Deck marked a a a IS 2S 4S 3 6S produced in matter of BARROW v. MIDALCO NOJ148 OF 1987 -14-- i Orer Ho. 2 Second Deck Ovier Ho. S second dock Sailings from No. Z Over Ho. 5 Top Deck < before reversing Torrey Over No. S Top Deck PROOUCZD MATT!? CF * HI:VS V i -UDALCO NO 1161 OF l9o? marked 9 9 9 9 7S 68 88 103 118 The possibilities in this regard are:- (1) Puap from Melba Creek where it crosses the Zeehan Renison Belle road. This is a distance of about i mile and the creek is about 400 feet 'below alii level. (2) Where the old East Pund&s tramway and the transalssion line intersect, well up lu the hills, Melba Creek is still running quite strongly and the East Dundas tramway almost forms a dam at this point. To pump from here would mean about the tame distance as before but there would be much less head. The actual height Is not known at present. (5) The Argent River in front of No. turoel is a possibility but is very inaceesslble and has been known to dry up in Summer. (4) A further possibility would be to construct a lb ft. dam between our spur and the Renison Belle Road. This would entrap water from the catchment formed by our main hill and the flat in front of the mill. The main objection to this is that we wish to fill tuis area with tailings eventually.- ^* NOiW8 0F]987 -15- PROI^X!.!):nmaTTcRC HtVw V ,.;!DALCO NO 1161 OF 1937 lit, Lvlq U. & R. Co. Ltd. - **1 McRoberts and X visited the lit* Lyle Co* on t Thursday 9th December* Mr* Murray, General Manager was ILL'lu^ we saw Mr* Mallne, General Superintendent^ Mr* Jafci&s, Mining Superintendent, Mr* Barclay who is apparently Mr* Jaklns assistant, Mr* Duff whose position is not quite clear but who has taken Mr* Robinson1s place apparently (Mr* Robinson died some six weeks ago) anu a number of other officers of the Company* All officers . were most friendly and co-operative* Mr* Kallne said he had a brother in tne C*SP.* Co* * ltd* many years ago who was manager at Harwood Mill. We questioned Mr* kallne concerning the best type of truck for our mining operations and he recommended the "Bavkum* 1 cubic yard side tipping truck, 2*-0 gauge, and he iude plans of this truck available to us* He also said he could sell us a couple of dozen wheels for this type if we found it difficult to obtain them. Mt* Lyle Co* make their own trucks and Mr* Mallne said that in normal times they would be quite willing to make some for us but he could no< offer to do so at present due to material and staff shortages* This truck weights 12$ cwt. and in 1935 cost 32 each to [ sw? make in Mi* Lyle Workshops* f X told Mr* Mallne we would shortly have to renew the to segments in our No* 2 Jacques gyratory crusher and as we had no experience in this work we would welcome any assistance be-could -offer u*. -He offered to make a man available to us who was used to this work immediately we were ready to fit the new segments. Mr. Jakins had visited the site of our asbestos mill but said that he had not considered the best, methods of mining* He said, however, that it had crossed his ulnd that for mining on a fairly large scale it would be p;<Ol H Cl \) IN MATHJ< OK bakkow v MiOALCO NO 1148 OF 1967 -16- i -;av\ nu< i H..\ j V i.UJMLCO WO i 16} OF 19b7 possible to driva a shaft Into the hill almost at sill.............. leel# i*lst to the surfaea in the hill and then excavate and-du^ rock down the rise to trucks In the drive. Barclay took us up to Vest Lyle to see the open___ cutwosjk after Ur. Haline had explained the whole of the $ workings to us on a sodel 100 feet to 1* made of t.oii. The aodel is corrected each year. jit Vest Lyle sose 6000 tons of rock per day is being excavated. Host of this is Billable rock containing 0.6 to l.ijC ore* but a percentage Is barren rock whicKHiJus'ed^r^ j " to fora roads around the hillside.' All "roads aye well ' nade, bltuaen sealed and a minimum width of about 30 feet. There are three sain benches each about 50 feet high and a further bench sunk 80 feet belo* the ordinary working level. To take out material from this lower bench instead of hoisting the material, a 24 ft. tunnel has been cut into the bench from lower down the hillside and the ore *. s taken out through this by lorry. ------- For blasting, holes are drilled up to 30 feeb oeep^ but--- SO feet is most comaon and these are charged with A.H.' SO-- . .. polar gelignite. Monobel had been uaed following x-ocomaeadatlar by Ur. Edwards of Z.C.Z. but Ut. Lyle could find no advantages and have reverted to gelignite. All holes all over the workings are shot at the one time, usually at a change of shift or at crib time and three minutes before firing a siren wails and continues to wail until all shots have been fired. Material that has been blasted out is lifted by aechanical shovels (aostly 2$ cubic yard Harman typo) and placed in 16 and 20 ton trucks. Any rocks larger than 2*-0* are drilled again and pop shots put in to break tueo up. The reason for this is that the maximum sire rocs the rail trucks running to the all! can discharge is 2'-0". Produced id Asbestos Personal Injury Cases: Abrams lead and copied to Richard F. Scruggs WXXXJLU) IN MATTER OF BARROW V WIDALCOT^ NO U480F 1987 _. . -17- n H*XG V ^`^CO "O 1161 OF i*-,7 There ere about 9 aechaalcel shovels, these being 4 - ) cubic yard, 5 - 2 cuble yard,. 1 - l cubic yard and 1 - 1/Srd cubic yard* About half of then are diesel driven and the remainder are electric driven and cables have to be run to these* When blasting some of the rock Is scattered fairly widely and to save the time of the mechanical shovels, a tulldoser Is used to push all the pieces to a common dump on each bench* ______ _ ___ --------Some-of the-14 and^O-ton^lorrfes'-are Leylands which have not given very good service and the remainder v.iich are Podeas with Gardner ingines have given wonderful service* All trucks (9 total) are fitted with semi-trailers* The lorry has two front wheels, four back wheels and the trailer has two sets of four wheels* The chassis as Imported were too light in every case and lit* Lyle now makes all tnelr own chassis from channel iron* The truck bodies whljh are exceptionally sturdy are made by Peters Bros*, Sydney* The lorries discharge into a vertical shaft abc it 6*t0* diameter which has a conical top some 50 feet in diameter* The top portion of this shaft is about 10o feet deep'.and this, together with the SO feet diameter cone, constitutes a storage hopper* At this level the ore is regulated to fall a further 600 feet as required, into railway trucks (10 tons with discharge doors at each side of the bottom). This shaft is never allowed to fill up ms if -a blockage occured it would be almost impossible to free it* The discharge from the 600 feet shaft into the trucks is controlled by a 'curtain of heavy chains which is moved away from or in front of the discharge opening as required by means of a motor* ^, All tools, excavating equipment, lorries etc*, are fully maintained and repalred~by the Xt* Lyle Co. at -18- PRODXEDINM HEYS V. |.<1D NO JIM OF *'4 VawfeMyle, and an extraordinarily complete stock of spare of ^aweonditlonlng and Mr* Jakins told me that out of every * 8 npa^e parts now Issued from the store for replaceawj.t, two - For deep drilling, Mt* Lyle uses detachable bits, but . for popping and for shallow drilling, steels are still used* Mr* Barclay considered detachable bits were not economical for drilling shallow holes as the hole was invariably bigger than could be drilled with a steel and the tendency then was to use too much explosive* The bits were originally re-sharpened on a cold grinding machine but this has been replaced by the hot milling process* Too such metal had to be ground off the worn bits wl ;h the cold grinding and often only 3 or 4 uses were obtained from They now average 9 uses per bit. a bit* / Mt* Lyle offered to sharpen bits for us, if we commenced using them, at 3d per bit and also agreed to recondition the shank of some of our existing steels. The total cost of excavating rock at West Lyle (including, Z believe, maintenance, depreciation on aqulpment, overhead etc*) vaa given to me by Mr* Mallne as 8/6 per ton* He said this was far too high and he fully believed that after the war when he could obtain adequate equipment for the work that ha would be able to reduce this greatly* The locker rooms at Mt* Lyle are fitted with lockers X $>* deep and approximately 4*-t8s from seat height to top of locker* The door opens just above seat height and a seat runs along the front of all lockers. Eacu pair of lockers is fitted with a 1/3 K.W* electric heater t the bottom for drying clothes, and ventilation. is ^rovid. u in the locker top* This heat which can hardly be felt in each locker i* sufficient to dry the miners' clothes in 8 nours. ff/CCX . /Vo*/ /jut jz_e///9rt 7~%:<-.