❓ Hon Robin Chapple questions the Minister for Mines and Petroleum regarding ventilation defects at the Barrick Kanowna Raleigh operations, citing internal memos and survey logs that contradict the Minister's previous statements. The Minister acknowledges ventilation issues and states that affected headings have been stopped until compliance is achieved.
AnsweredQoN 2512Legislative Council
QuestionView source ↗
I refer to the Barrick Kanowna Raleigh operations, internal memorandums numbered RUM-MO-10-31 and RUM-MO-10-32, the Raleigh Secondary Vent Survey Log Sheet dated 2 February 2010, which are available for viewing at,
http://www.robinchapple.org.au/sites/robinchapple.org.au/files/2010-02-03%20RUM-MOs%20Raleigh.pdf
, and question on notice No. 2276 answered on 20 April 2010, and ask -
(1) Why did the Minister state in his answer to parts (10) and (12) of question on notice No. 2276 that, ‘no notices regarding defects in the ventilation system have been issued’, and, ‘during such inspections of the secondary ventilation system the taking of temperature readings can be used to establish that the system is in compliance’, given that internal memorandum RUM-MO-10-31, issued by both Ivan Van Rooyen and Adrian Halim the Acting Ventilation Officer to Ryan Burns, Fern Schnabel and Shift Bosses (the officers) states, ‘maximum temperature recorded at decline face - 27.5 degrees wet bulb and 36 degrees dry bulb exceed wet bulb as stated in MSI Act Regulation 9.5, exceeding regulation temperature of 25 degrees wet bulb. Jumbo operator boring at time reading was taken and velocity reading was 1.3 m/second’?
(2) Why did the Minister state in his answer to parts (10) of question on notice No. 2276 that, ‘no notices regarding defects in the ventilation system have been issued’, given that internal Memo number RUM-MO-10-31, issued by the officers also states, ‘it is evident that some headings in the mine are not meeting the required ventilation flow for both shotcreting and bogging. Temperature in lower levels of the mine - 5975 level to decline face, reaching and exceeding the regulation temperature of 25 degrees wet bulb as stated in
Mines Safety and Inspection Act
regulation 9.5’?
(3) Why did the Minister state in his answer to parts (10) and (12) of question on notice No. 2276 that, ‘no notices regarding defects in the ventilation system have been issued’, given that the secondary vent survey log sheet, completed by Ivan Van Rooyen on 02/02/2010, clearly indicates that the ventilation in the 6085 level, the 6051 level, the 5966 level, the 5932 level, the 5915 level the 5898 level, the 5847 level, the 5830 level, the 5812 level , the 5795 level, the 5778 level, the 5761 level and 5744 level, cannot support shotcreting on all of these levels, and the 6085 level, the 6051 level and the 5744 level, cannot support bogging, given these were all in fact active headings that require both shotcreting and bogging during operations?
http://www.robinchapple.org.au/sites/robinchapple.org.au/files/2010-02-03%20RUM-MOs%20Raleigh.pdf
, and question on notice No. 2276 answered on 20 April 2010, and ask -
(1) Why did the Minister state in his answer to parts (10) and (12) of question on notice No. 2276 that, ‘no notices regarding defects in the ventilation system have been issued’, and, ‘during such inspections of the secondary ventilation system the taking of temperature readings can be used to establish that the system is in compliance’, given that internal memorandum RUM-MO-10-31, issued by both Ivan Van Rooyen and Adrian Halim the Acting Ventilation Officer to Ryan Burns, Fern Schnabel and Shift Bosses (the officers) states, ‘maximum temperature recorded at decline face - 27.5 degrees wet bulb and 36 degrees dry bulb exceed wet bulb as stated in MSI Act Regulation 9.5, exceeding regulation temperature of 25 degrees wet bulb. Jumbo operator boring at time reading was taken and velocity reading was 1.3 m/second’?
(2) Why did the Minister state in his answer to parts (10) of question on notice No. 2276 that, ‘no notices regarding defects in the ventilation system have been issued’, given that internal Memo number RUM-MO-10-31, issued by the officers also states, ‘it is evident that some headings in the mine are not meeting the required ventilation flow for both shotcreting and bogging. Temperature in lower levels of the mine - 5975 level to decline face, reaching and exceeding the regulation temperature of 25 degrees wet bulb as stated in
Mines Safety and Inspection Act
regulation 9.5’?
(3) Why did the Minister state in his answer to parts (10) and (12) of question on notice No. 2276 that, ‘no notices regarding defects in the ventilation system have been issued’, given that the secondary vent survey log sheet, completed by Ivan Van Rooyen on 02/02/2010, clearly indicates that the ventilation in the 6085 level, the 6051 level, the 5966 level, the 5932 level, the 5915 level the 5898 level, the 5847 level, the 5830 level, the 5812 level , the 5795 level, the 5778 level, the 5761 level and 5744 level, cannot support shotcreting on all of these levels, and the 6085 level, the 6051 level and the 5744 level, cannot support bogging, given these were all in fact active headings that require both shotcreting and bogging during operations?
AnswerView source ↗
Answered
10 August 2010
Responded by
Minister for Mines and Petroleum
Response time
54 days
The inspection and recording of ventilation systems and temperatures as detailed in the internal memorandums and the Raleigh Secondary Vent Survey Log Sheet form part of the duties of the Underground Ventilation Officer under Regulation 9.5 of the Mines Safety and Inspection Regulations 1995 (MSIR).
Regulation 9.15(3) (MSIR) states that the manager of a mine must ensure that if the wet bulb temperature exceeds 25 degrees Celsius an air velocity of not less than 0.5 metres per second is provided. For the decline heading mentioned in the memorandum, the wet bulb temperature was 27.5 degrees Celsius and the air velocity reading was 1.3 metres per second.
(2) The Raleigh Secondary Vent Survey Log Sheet confirms, as is mentioned in the internal memorandums, that some headings do not have sufficient ventilation for both shotcreting and bogging. These headings have been stopped and cannot be worked for shotcreting and bogging until sufficient ventilating air flows are available to comply with the MSIR.
(3) The Raleigh Secondary Vent Survey Log Sheet shows the ventilating air flow rates present in each of the headings at the time of the survey.
Due to the large number of headings available at the Raleigh Mine (approximately 25) many of the headings have been stopped whilst work is done in other areas. A heading cannot be worked for shotcreting and/or bogging until sufficient ventilating air flows are available to comply with the MSIR.
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Regulation 9.15(3) (MSIR) states that the manager of a mine must ensure that if the wet bulb temperature exceeds 25 degrees Celsius an air velocity of not less than 0.5 metres per second is provided. For the decline heading mentioned in the memorandum, the wet bulb temperature was 27.5 degrees Celsius and the air velocity reading was 1.3 metres per second.
(2) The Raleigh Secondary Vent Survey Log Sheet confirms, as is mentioned in the internal memorandums, that some headings do not have sufficient ventilation for both shotcreting and bogging. These headings have been stopped and cannot be worked for shotcreting and bogging until sufficient ventilating air flows are available to comply with the MSIR.
(3) The Raleigh Secondary Vent Survey Log Sheet shows the ventilating air flow rates present in each of the headings at the time of the survey.
Due to the large number of headings available at the Raleigh Mine (approximately 25) many of the headings have been stopped whilst work is done in other areas. A heading cannot be worked for shotcreting and/or bogging until sufficient ventilating air flows are available to comply with the MSIR.
Notice: This document is created or edited using unregistered or evaluation copy of rtLib valid for testing or development purposes only. To use it for productive or any other purposes please register it. You may purchase the license on
http://www.rtlib.com
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