When preparing a permitted explosive recipe an energy or heat is considered, which should ensure the detonability of system and at same time power that satisfies purpose for it will be used, under conditions firedamp hazardous mines. The safety parameters charges used in mines are decisive, order to health requirements work together with efficient performance blasting operation. type emulsion r...

At the underground mining works performed in coal, rock and mixed coal & rocks, process applied almost exclusively is by drilling blasting. Given that mines Jiu Valley are classified as methane mines, this involves use of explosives means initiation safe from gas dust. To date, permissible powdered have been widely used. The blasting patterns were established according to physical - mechani...