NSW Resources & Energy Australia I would like to thank the UNECE for this opportunity to present the New South Wales mining industries journey from an approval system to the IECEx Global Certification Scheme.
Background Within Australia, we have state and territories that independently regulate industry safety. The New South Wales (NSW) Department of Trade and Investment Regional Infrastructure and Services, regulates mine safety through Mine Safety Operations Branch (MSO). My role as an Inspector of Electrical Engineering - is regulator verification and enforcement of mining activities. Some relevant examples include underground and open cut coal mines, coal seam methane extraction and onshore petroleum exploration activities.
The major coal resources within Australia are located on the eastern sea board states of NSW and Queensland. NSW coal resources and mining activities are located in the 500km long, 150km wide Sydney-Gunnedah basin. For those familiar with Australia, the Gunnedah basin extends south of Wollongong, north to Newcastle, and north west through Narrabri to Queensland.
There are currently 34 underground mines in operation in NSW, many with expansion activities and several additional are planned. Within a coal mine are numerous hazardous zones, places where coal is extracted and airways leading from the face areas where methane gas and coal fines are present. Many of our existing mines are defined as very gassy and operate with carefully managed ventilation strategies at the first layer of protection against explosion risk.
Explosion Protected (Ex) plant is another prominent layer of protection to reduce the likelihood of explosions in mines. Ex plant has been used extensively within the coal mining industry for many decades, predominantly in underground coal mines but also in some surface application directly associated with the mine management and coal processing. Increasing global fuel demands, installations of Ex plant is becoming more common on the surface of coal mines in places such as ‘coal reclaim tunnels’ and “coal seam gas extraction”. Hazardous Zones within NSW underground coal mines remains strictly regulated at present, however we have recently embraced hazardous area classification assessments strategies for mine surface activities with increasing success.
On average, each mine would have more than 4,000 items of (approved or certified) electrical Ex items in use at any given time. The average longwall will contain more than 2,000 items.
Our journey The original 1912, New South Wales coal mining legislation called for Ex plant to be approved for use in underground coal mines. That approval scheme was managed by MSO until 1999, and involved an assessment by an Inspector of Electrical Engineering then the Senior Inspector of Electrical Engineering signing off on all electrical approvals, under a delegation from the Chief Inspector of Coal Mines.
Post 1999, NSW regulation was altered to remove the requirement for the regulator’s approval and to permit certified explosion protected electrical plant from recognized schemes A staged transition occurred to firstly permit equipment certified, firstly under the national schemes of AusEx and ANZEx, before moving, in 2006 to embrace the IECEx scheme A pivotal key to the transition was the maturity of risk management in the industry and the industry’s capability of determining fit-for-purpose explosion protected equipment with minimal regulatory input
The transition to permit the introduction of IECEx certified plant required MSO to consult with all industry stakeholders. Many Original equipment manufacturers embraced the opportunity to operate within the global market.
Change without increase in risk It is the view of MSO that change to existing work practices must pose no increased risk to mine workers, and that any risks must be as controlled to a level as low as reasonably practical (ALARP).
The 2006, New South Wales Coal Mines Health & Safety legislation allowed for an instrument called a Gazette notice to be used. It offers flexibility in certain aspects of legislation, and can be used to manage transition periods. These notices are developed by MSO and then reviewed by the Mine Safety Advisory Councils before being published in the New South Wales Government Gazette.
One such Gazette notice relates to equipment suitable for use in a hazardous zone. This notice makes it a requirement that certain items of information (eg. Documentation and drawings) have to be supplied to the mining operator. The required information is generally, in addition to the requirements of the IECEx certification scheme. The latest version, IEC 60079.0, addresses some of these documentation issues.
Some of the major challenges MSO faced during the introduction of the IECEx certification scheme were:
Currently as part of the 2012 national OHS harmonisation legislation being introduced by Australian states. The mining regulations being developed through Safe Work Australia do not include IECEx certification requirements.
Because of this, working parties from across NSW, Queensland and Western Australia have recommended including IECEx certification in their state specific mine safety legislation. This recommendation is being considered by the governments of each of those states.
The director of MSO has been fully supportive of the journey from approval to global certification, and continues to support participation in the management of IECEx and the development of international and Australian standards.
New South Wales will continue to work with IECEx and is currently looking at IEC Personnel Competences scheme and Recognised Service Facilities schemes.
In summing up, the keys to successful implementation have been: