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NONEL MS

NONEL MS is conventionally designed with 25 ms delay between the period numbers. The firing sequence is built up through the unique delay time that each period number has. The initiation of the round takes place on the surface with connection blocks with momentary initiation, Îľclip 0. The system has 18 periods numbered from 3 to 20. The system starts with No.3 (with 75 ms delay) to allow all surface connectors to be activated before any explosive detonates causing a potentional cut off. (The NONEL-tube has an inherent delay of 0.5 m/sec as the shock wave velocity is 2.100 m/ sec, that may cause problem in bigger rounds with long surface activation trunk line). With a 75 ms delay of the first period it is possible to have 150 m of tube in the connection units on the surface without risking parts of the round being cut off due to flyrock. The NONEL tube to a detonator with lower nominal period number must not be more than 8 m longer than the tube of a detonator with the next higher period number. NONEL MS is mostly used in bench blasting above and under ground, in underwater blasting and sublevel stoping. 12

NONEL USERS MANUAL  

NONEL SYSTEM

NONEL USERS MANUAL  

NONEL SYSTEM

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