EBZ260 Roadheader for highway tunnel

• Roadheader used : EBZ260
• Project start date : 2014/3/20
• Project completion date : 2015/4/22
• Surrounding rock grade: F5
• Rock hardness at the beginning of the tunnel : 50MPa;
• Rock properties: sand stone mixed with volcanic pebbles.
• Tunnel section 11m width × 10m height, the first layer (11 * 7 widthxheight);
• Working nine hours a day, progress achieved was 154cbm / day;