APPLICATION OF EMULSION EXPLOSIVES WHEN EXPLODING ICE COVER

Abstract

To prevent and eliminate dangerous ice jams in riverbeds, the explosive method is currently most often used, less often used are aerial bombing, mortar and artillery shelling, as well as the icebreaking method. The article considers the experience of dealing with congestions in flood-prone river sections using an emulsion explosive (EE) of industrial production NPGM-P-II-M brand with a diameter of 60 mm manufactured according to TU 20.51.11-016-37945333-2017 used as the main charge for exploding ice sheets. The initiation and installation of the network was carried out using a detonating cord of the DShE-12 brand and pyrotechnic relays of the RP-D brand. This type of explosives and initiation systems have shown their undeniable advantages over other classes of industrial explosives having excellent water resistance, as a result of which explosive characteristics are preserved in flowing waters and even at great depths [1]. As a result of the work carried out for blasting ice with an average thickness of 0.7 meters, EE have advantages over regular explosives and explosives from recycled ammunition [2], both in technical and economic aspects. The specific consumption of EE was 0.36 kg/m3, which is several times lower when using (TNT containing) explosives when crushing ice.