Document DG21MX8GqoLxproGm0D55GeG5

FILE NAME Colonial Sugar Refinery CSR DATE 1957 Aug DOC CSR134 DOCUMENT DESCRIPTION Govt Inspection Results with Dust Counts - Wittenoom Mines 3 ao 7 Y. a ; one Iko So Australian Blue Asbestos : . : . WITTENOOM Ltd a . . . wet Dear Sir a. : 2s. . - Attached is a copy of dust counts and temperatures recorded underground working places at your Colonial and Wittonoom mines Also the results of dust counts taken in the treatment plent ; You will observe that the dust counts ere underground very high through working places { air made flow - volume of These could be lowered by ensuring that's grester v^ is to the | : i. fb. wy os 00 a 5 OF, ETxohtaaulstmessured fan 28,750cfm - ot Intake before befor|e Hain Adit 28,750cfm No.1 No.1 South Drive Fluctustes may even reverse No.2 South Drive 4,950cfm No.3 South Drive 27,000cfm . 60,700cfm Wittenoom Mine ` Exhaust messured post fan Intake through new portsl 50,625cfm 32,650cfm Air is lost through the doors in the following Through " door to 1181 " 1200 " * 1600 " * 2000 * 2400 Crosscut 3,120cfm 3,120cfm Crosscut 6,430 * Cros--out 9,100 * Crosscut 5.200 " Crossout 6,600 * - quantities Yours feithfully 7 DISTRICT INSPECTOR OF MINES J. N. PLAINTIFF'S Bayonne Bayon e EXHIBIT Bayonne Bayonne PENGAD PENGAD PENGAD . / State Mining Engineer Mines Deportment PERTH 3 KALGOORLIE 23rd August 19 the mejor airflows I visited Wittenoom during the period 13th to 17th August and inspected inspected underground working places both Colonie . and Wittenoom mines made messurements of and inspected and secured duet counts in the treatment plant A copy of the temperatures and dust counts recorded at places is The majority of the ore is now being won from the Col- oniel mine where about 20 machines are engaged on stoping opera- tions These machines break the ore on one shift and on the shift opposite to the machines scrapers are used to clean the face is and move the broken ore into the passes The ratio approximate one scraper party to two machines Development is carried out by three parties and appears to be legging behind At the Witten- com mine the operations are now purely on a selvage basis 81x scraper parties are engaged closning the broken ore from stopes and this is expected to be completed by the end of the current month were Air measurementa These neter and resulted made using a vane anemo- Colonial Mine : Exhaust . 68,500cfm 68,500cfm . Intake through Mein Adit 28,750cfm 10 through No.1 South Drive Plustustes . may even revurse It bad No.2 South Drive 4,950cfm 4,950cfm ve Fluctuates . % No.3.South No.3.South Drive 27,000af^ Total Inteka ~~ 700cfm . N.B. In previous reports No.1 South Drive and No.2 South Drive | have been referred to a No.1 Cliff Opening and No.2 Cliff Opening respectively but the new titles are those now adopted at the mine to The shove figures for sirflow indicate that a large vol- ume of oir is passing through the mine which is correct but the path the sir takes is variable At one time the velocity of the sir entering through the main adit is very strong whilst short time later the velocity is practically negligible and the air must be entering the mine through another opening The airflow through the No.1 South Drive is very smell as an intake and at times has been messured as reversing In fact there is no positive sirflow through the intake openings and no constant peth that the sir adopt The cause is attributable to the air currents in the gorges and slo the walls of the gorge In order improve the airflow it will b necessary to instal doors regulators and fans to induce the re- quired sirflow The ausention of the mine management was drawn to this matter as well as the need for the air to be prevented from short circuiting directly to the mein fan without passing through working places The fan inducing the airflow is a 60 Axial Flow fan 10stalled at an opening to the mine workings on the mastern cliff fue 500 rect north of the main sdit Wittenoom Mine Exhaust . Intake through New Portsl 50,625cf 50,625cf 32,650cr The discrepancy between Intake and Exhousted air is 17,975cfm which is probably being short circuited to the fen through the effective sealing of old edit o onings and poor stopping at fen itself see . inthe nye . a 132 132 For the smount of work proceeding in this mine the 32,650 cubic feet per minute entering the mine is adequate although more air could be made to extend to the bottom of the mine to vent- ilate the 2700 stopes The loukages through the doors does im- prove conditions in some stopes The losses through the doors are tabulated below Intake through now portal Lost through door in 1181 Crosscut . Lost through door in 1200 Crosscut Flow along 1180 Drive Lost through door in 1600 Crosscut Flow along 1180 Drive Lost through door in 2000 Crosscut Flow #long 1180 Drive Lost through door in 2400 Crosscut Flow along 1180 Drive 32,650cfm " 3,120 * 6,430 " 23,100 " 9,100 " 14,000 " 5,200 " 8.800 * 600 " 2,200 This 2,200cfm flows to sir eventually resches atopes etc. the the 2700 stopes exhaust fan and joining with the by way of old worked other out Dust Counts The attached figures sppear to me to be i very high for the underground workings Whilst I do consider that attention could be given to improve the air circuit through the mine conditions underground were satisfactory and is evidenced by the wet and bulb temperstures Compressed water jete Hre supplied at the ore passes into which the ore is scraped During seventy five percent of the time I spent at the Colonial mine water was not available due to the main water pipe to the mine being broken This caused boring operations to be suspended but did not effect the scraping which continued irrespective of water being available or not With the instrument used for taking the sample of dust there is ' tendency particularly in a dusty atmos- phero for future sections of the glass slide to be poluted I feel then that the results obtained under these conditions for the dust samples are not a true indication of the dust content of the air Trestmont Plant Little visible improvement was evident to the external appearance of the treatment plent However much is being attempted in an endeavour to improve the dust collection That suction of the pl^,ntwhich includes the Rolla Kubit brosker and screena has been totally enclosed and fitted with exhaust ducts which connect to ducting leading to a Rotoclone dust collector This dust collection appeara satisfactory Another Rotoclone unit is installed but sa yet has not been permamently connected to the roof discharge from the fibre collecting cyclones An inadequate supply of power was given a one reason When connected @ greet improvement is expected Foundations for a third Rotoclone dust collector have been commenced It is anticipated this will exhaus dust crested at the crushing units inside the plant building Plens h^,ve been prepared for the construction of a new treatment plant st the Colonial mine Bulldozers were in operatio levelling out fill for the foundation for the site The high cle- vation of the entrance to the mine on the gorge fuce and the f^,ll into the velley of the gorge should assist in the plant layout Th first construction anticipated is the instelletion of a conveyor belt in the lower tunnel to convey the ore from the mine bin to a jew crusher thence to a Symmons crusher and to a storage bin The ore will be carted by trucks from this bin to the treatment plant i Wittenoom gorge whilst the remeinder of the plant is constructed General At present the fibre being recovered is in the vicinity of 1000 tons per four weekly period and tala from the treatment of 17,000 tons of ore It is envisaged that a tonnage of 40,000 tons of ore per four weekly period will be si^ ... oe wet 3 c i4 i4 i4 and This will call for incressed working stopes development will have to be stepped up All this will require improved ventilation \ and possibly the sinking of a ventilation shoft from the top of eam the hill will be necessary sooner then is anticipated at the moment DISTRICT INSPECTOR OF MINSS TAPILATION TAPILATION OF DUST COUNTS me an Ry 439888- MIKE DATE TEMPERATURE PLACE , COUNT DRY WIT REMARKS PATTERMeR Feel aee ftLL en em Dis Be 57 Olonial lling_ 650 75 section Culling Culling 6. f1040 stope Cutting 6040_ 6040_ " Pee Li _600_ -76- -76-76- : . GL_Horing GL_Horing GL_Horing20 Coal fea_enuisting 5 - dosing Through air 5 Stopa drive Dono 5010 3, Ssation innstiller : ...77 ... 1000 75 icraping.ist installed icraping.ist opponite_shift 119 icraping.ist Semping FonFon 64 icraping.ist icraping.ist : instaled mid- Bicos during sofeping apore- Ptasofd epinga aporei - a eS t 5020 N 6010 yoy, 2, ae 6020 st : 1020 chu 10s 20 tops Sootion 4020 stops drive _ 1000 16 usiRintoped_nowats grroouguhgh 110000+ 00 nKo.Pt. Ritoped_no_watous sing -1000- 76Se -H]Ssose Langs. * 7h 67- Lil w * 79 -70 -74-74- 39berma3i9bnermain39be3r9bmeramaiin3n9bermain not Be 72- springair 67 spring air Ritopped_no_watos Chrough te.) a CJ oir by Ritopped_no_watos spray spray Vent -by mschino iulo no vster Through air > Sel rs eee nee 1010__ 1010- 1050 " R.K Scotion " oe Ed a -N.M. C2 4050 a, LJ 20250050 " rate, : 2050 2050 Chut^' 79 62- Muchine idle no water Through . -74- -59- 1 Ld M * 70.5 M * 77- at 65phine Kired neles Doid -7-979 65phine jule 60 71 and Secondary- operations required s 60 Ventilation Ventilation -60- -60- ELIGII Korppingoperations operations un-- tet .65 51 intake 15 BB? _ 0.3 0.3 Strimpinge 9020 chute 110.5 unika Couth -9050_11 u0 g^rgefrom through5, joicing clms mech 250 59 Pet 59 ' ye clean up by bogging thebroken ors fromrise sog ing sog ing soon and Stripsing .490 62 so n trucku thegrippings gripingsVent _ DrivHare th by iling pra_hung pra_hung up Ho.1 2050_thuse 900 ceca 1110.2011.0.22 " 2 ony -2050- -2050- 10001 [aan Seen trucku Tre berred down ST, 3464756 2 DATE MTHE BLUE ASBESTOS LTD 57 1557 Mine TARULATION OF DUST COUNTS TARULATION ) TEMPERATURE PLACE COUNT DRY I WEY ALB REMARKS No.4 DrDrive ivNorteh 270 74 Boring machine : 6364 Kinara shift be cleancedleaned up - - - BrokenNo.3 contri- No.3 convyBk8t convyBk8tt Transfer onto 1000+ 540 Transfer fromConveyor Main In_botom_adit In_bottom_adit 380 In_bottom_adit 2080 driva Neat -750 Stope 2010 Lonar Beam Stope GNAR 8. Section_400 Section_400 72 2010 Atopa 73 # _16 -8-57 | -8-57 -8-57 Wittencom 2702 Scraping 270 78 maRitggineg rial 76 Boraping RigginRgboltoorrinBguggRiinng Charging holes _5_685N8i_g3hNtisgihontstion_58_Nightsstione_58Nightsionarleequ18<X7ir2-98Fe8 dfon 2004 Scraping # 2404 N -- 2004 150. 79 -390-540 through 70 ain: rp atoper att in ChangiCne hangine Horipingt 2001 Lower Horipingt 400 2001 Middle StopeLongneHoripwngt Portel -530 Dust plent InInttaakkeeo of f airthroughthrougth hrough Horipingt -530 Portel 270 58 through stope Through_air__open_stope Through_air_open_stope Through_air__open_stope 66 from treatment polluting- _ . . Cee eee et DISTRICT INSPECTOR : , ieebiewes vee ymin etee wa 16 ~ 8-57 8-57 8-57 TABULATION OF DUST COUNTS : ) TEMPERATURE | PLACE . COUNT DAY WET . Trustment Plent No.1 No.1 & Roso Ohmin Feeder from No.2A Conveyor belt Feed to Blake Jaw Crusner Jacques Crusher Vicinity Praylor orusher Vicinity Vicnity Nymons fro to bolt Vicinity of Cobra M111 Nolls for Nolls and Operating platform 420 250 360 540 730 1000+ 1000+ . 480 Operatore platform vicinityfibre- 420 fordons fibre- ^^lisation^^lisation - Vicinity of Mos.3 & 4 Trommels 440 | nagging section - Ragging section Centro of fibre storage room Outside plant Vicinity of . Plant office a 360 2000+ 210 100 K.S. 299 ee REMARKS Oparatora plytHigrh co untfddm unt due grobably to diet discharged from . At the plakora positions Operators platform . Crushor stopedplatform Somple teken at op Men employed cleaning up around here Seaphinpaauiaarecemeg ainsi tales : _.* : enclosed enclosed P totaly totaly his scotion totally lesding enclosed and to Roto- neated to ; dust collection es unit i : : Weighing bog . : . Two men working here filling bega ~ Bags being loaded onto truck outside . : i : eee nl Farchney HOT INSPECTOR NIMES