Document 7Rm29MgNzveL0nxB9py176GB

FILE NAME Colonial Sugar Refinery CSR DATE 1958 May 22 DOC CSR126 DOCUMENT DESCRIPTION Govt Memo RE Dust Nuisance at Wittenoom Mill with Air Measurements * te. wee eee. Nee fo eee 21- 00169933-3 aK GOVERNMENT OF WESTERN AUSTRALIA . ALD Memorandum MINES DEPARTMENT : of The Senior Inspect Mio ner s _ a To oe Wittencom - 22nd May 58 2 7 . Yesterday | I made an inspection inspection of all current underground the - working places of Colonial kine and then examined the mill +b7uilding Sup vt ute ann recommended : my es The modifications in earlier report have ) been adopted been adopted and the mill atmosphere has never been better than . | it was yesterday All sections of the plant appeared to be work- ing to ospscity so there seems.every seems.every reason to expect that the existing conditions can be maintained Kr.Allen Kr.Allen . have at last got the dust problem within the wlaismitqsuitoef hcaonptpryal and the atmosphere is sufficiently clear to bring to immediate : notice any faults in the collecting system Some of the modifio .. attachments ations were tried out with temporary fittings These will now be ' . replaced with permanent oe : iad : PLAINTIFF'S EXHIBIT = a eo AIR MEASIFREI^ INTS A.B.A LTD - 28.5.58 146 No.4 level Intake = 19,425 c.f.m. Air flowjle N. N. of 415 Kenway = 10,000 a.f.m. Air flo" 8. of 41 K. Hunway = 9,400 c.f.A. Air nosat through serviceway af.mis^ c.f.n. - af.mis^ Airf up No.4 Turnout = 810 af.mis^ Airdow N. of 41 II Kenway = 1250 c.f.m. ee un ventilsting face of No.4 level north drive peast through 42 N. Menway - 3,800c.f.m Volume = 2,550c.fim No.3 level . Inteke = 33,600 c.f.m. Airflow up No.3 Turnout 3.050 c.f.m. No.2 lovel oe Leakage in through door = 450 0.2.m. Air flowing S. N of 6010 Kenway 3,520 c.f.m. This volume is upcast from Main incline through Serviceway Airflow up No.2 Turnout = 6,560 c.f.m. - flows N. No.1 level charging Flowing 8. past Upcast from Hein incline station through and through Serviceway door to gorge 1 800c.f. st 5,1100c.f.m Flows 8 Airflow up No.1 Turnout " 8,000cfm 8,000cfm Nessured intoke through No.1 Adit Main incline = 19.320c.f.m. Thi figure appears low and may have been measured when door at No.2 lev was open Heasured Exhaust through 60 A.F. fen = 76,125 c.f.m. -- -- ---- ----"-- It appears that 8000c.f.m along No.1 Turnout and 6,560 c.f. Blong No.2 Turnout is being short circuited to the exhsust Couldn't doors be placed in these turnouts to stop this short circuiting At present there is 5,400c.f.m and 3,520c.f.m upessting through service to Nos 1 and 2 levels Probably these volumes would be increased 11 doors were placed in the Nos 1 and 2 furnouts and would be more than sufficient to ventilate current Lower Segm workings Hore sir would then Nos.3 und 4 levels and later ore breaking is confined be mude to flow down the main incline to No.5 level obave which the majority of \ It is doubtful if the placing of doors as suggested would | affect the mining at present proceeding in the northera end between No.2 level and the surface This is probably ventilated by return ; q air from Nos 3 and 4 levels even now t H \ H J. PLAINTIFF'S N. EXHIBIT - Bayone