Gasex - avalanche blasting plants are built in endangered slopes which are difficult to reach. During the summer months, the gas tanks (with 18 % propane / 82 % oxygen) must be filled up and the necessary service performed. Only in this way, the accurate operation in winter with radio activation can be guaranteed. The controlled explosion takes place approximately 3 meters above the snow cover. The artificial avalanche is elicited by the resulting pressure wave in an effective range of 50-100 meters.