The groove mortar, a reliable method for testing the flameproofness of certain explosives

Le mortier à rainure, une méthode fiable pour tester la sécurité au grisou de certains explosifs

Jean Bigourd (1) , J.M. Dassonville (1)

1 INERIS - Institut National de l'Environnement Industriel et des Risques

For more than sixty years, cylindrical steel cannons (long mortar and short mortar) have been used in France to assess the safety of explosives with regard to firedamp. These testing methods are considered expensive mainly because a large number of shots are needed äs a result of the low level of reproducibility. Also, using them with certain explosives, such äs slurries and emulsions, is somewhat problematical. Taking into aecount the Polish expertise, CERCHAR (now INERIS) developed m the sixties a testing method in which the Charge, placed in a steel groove mortar, is isolated from the methane-air mixture by an asbestos-cement plate. This method seems more attractive than those traditionally used, especially when it comes to distinguishing rock explosives from the more powerfui pennitted explosives.

Mots clés: GRISOU; EXPLOSIFS DE SECURITE; METHODE D'ESSAIS

Domaines: Sciences de l'environnement

Jean Bigourd, J.M. Dassonville. The groove mortar, a reliable method for testing the flameproofness of certain explosives. 25. Conférence Internationale des Instituts de Recherches sur la Sécurité dans les Mines, Sep 1993, Pretoria, South Africa. pp.133-138. ⟨ineris-00971869⟩