We own 2 diesel hydraulic Atlas Copco tunnel-rigs. This entails significant savings in rigging costs and -time since the mine extends over such a large area and the drilling sites are located far apart. First a 4 x 7 meter pilot tunnel is drilled. Thereafter the remaining limestone width is stoped. The average tunnel size becomes some 7 meter in height and 15 meter in width.

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For blasting purposes we own a specially constructed rig with a lift and air-compressors to blow the powder explosive (anfo) into the drilled holes. Ignition takes place by means of nonel-bade millisecond percussion caps.

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After the blast, loose rock is removed by means of a hydraulic hammer and after this has been done no loose stones remain so that it is not necessary to bolt the remaining surface.

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Loading is carried out by means of 20 mt GHH mine loaders and the stones are conveyed to the silo by means of Volvo-dump trucks. With transport distances approaching 3 km one way, it is necessary to maintain an adequate road standard. For this purpose we operate a 5 mt Gehl-scraper, witch uses rubble from the mine as road building material.