Myuna is an underground mine using a continuous mining method.
Myuna is located 25 km south west of Newcastle NSW in the Lake Macquarie and Wyong Local Government Areas. Myuna Colliery’s Surface Facilities Area is on the western side of Lake Macquarie, at Wangi Wangi.
Underground coal miming has been conducted at Myuna Colliery since 1982. Coal has been recovered from three seams (Wallarah, Great Northern and Fassifern) within the Project Application area and Development Consent mining area. The majority of the mining has been conducted under Lake Macquarie.
The method of extraction for these areas is by conventional underground bord and pillar mining methods. The mining system includes:
- Multiple seam mining – first workings or non caving partial pillar extraction systems where multiple seams are to be mined; and
- Single seam mining – first workings, partial pillar extraction or wide panel full extraction.
Two subsidence zones have been established at Myuna Colliery in accordance with the PA10_0080 (Project Approval).
- Zone A – long term stable mining systems generating up to 20 millimetres surface subsidence (i.e. no measurable or discernible surface impacts) on sensitive surface features including land and seagrass beds; and
- Zone B – Mining Systems generating up to 650 millimetres surface subsidence (under Lake Macquarie).
Mine Infrastructure:
- Men and materials portal;
- Conve ........
