Electric Häggloader keeps hydro tunnel green Jul 2011
Gia Industri AB News Release
A GIA electric Häggloader is meeting its green credentials for Norwegian tunnelling contractor Haehre Entreprenør. The recently-delivered GIA 10HR-B Häggloader is meeting all expectations of zero CO2 emissions while working on the Holsbru Kraftwerk hydro-power project near Øvre Ardal, 300km north-west of Oslo.
GIA Häggloader operates at zero CO<sub>2</sub> levels

GIA Häggloader operates at zero CO2 levels

Haehre ordered the Häggloader to operate on two faces removing rock following drill+blast operations in the 6km tunnel extension which, when complete, will allow Norsk Hydro to utilise previously unused mountain lake and river water resources.
With a cross-sectional area of just 20m2, conditions are ideal for using the rubber-tyred electro-hydraulic driven trackless loader. Featuring a hydraulic system powering an electro-hydraulic drive, to provide low installation and energy costs, the GIA 10HR-B also ensures good quality air with no CO2 emissions.
Using an underground jumbo drill rig, Haehre are drilling 65 holes on each of the two faces to a depth of 4.6m and achieving a rockfall of 86m2 with up to three blasts on each face per day.
The entrance at the Norsk Hydro tunnel extension

The entrance at the Norsk Hydro tunnel extension

Featuring a load speed of three to four cubic metres per minute has, according to Project Manager Ernst Ove Johansen, helped ensure a fast cycle rate loading the contractor's fleet of 9m3 dump trucks. Advance rates are up to 12m/day on both faces.
When the Häggloader leaves the face – to park in a niche during further drill+blast activities – it can operate on diesel power, reverting to electric when inside the tunnel.
Work on the hydro tunnelling project started in June 2010, with completion due in February 2012.

Add your comment

Thank you for taking the time to share your thoughts and comments. You share in the wider tunnelling community, so please keep your comments smart and civil. Don't attack other readers personally, and keep your language professional.
In case of an error submitting Feedback, copy and send the text to Feedback@TunnelTalk.com
Name :

Date :

Email :

Phone No :

   Security Image Refresh
Enter the security code :
No spaces, case-sensitive