Austria’s biggest supplier of oil and gas, transports gas through the West Austria Gasline for domestic consumption. In addition, the OMV also works as gas carrier and ensures the transit into neighbouring countries. In 2005 the OMV gas company and the Russian Gazexport signed new contracts to guarantee the gas supply until 2027. Instead of 7 billion m3/year, now 11 billion m3/year should be delivered through pipelines. Therefore the OMV has planned to build a new gas pipeline through the North-Eastern part of Austria, parallel to and only 10 meters an existing one, the capacity of which is fully utilized. The geology in this area is shaped by granites and gneiss formations of the .Bohemian Mass. Mechanical excavation was only partially possible. The paper proposed will initially present the test blast procedures, which took place 9 meters away from an existing pipeline that was in use with a nominal working pressure of 70 bar. In the second part of the paper the change from test blasts to production blasts with a depth of 3,20 m and a width of 1,6 m will be described. In this project, the task of a blasting engineer was to carry out the operations economically – 300 m of trench blasting a day - maintaining high standards of safety. The national and international standards for vibration limits had to be kept. Daily updates and regression analysis of the exceeded Peak Particle Velocities “PPV′s” had to be carried out in order to succeed in this project.
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