Author(s): Xinlei Guo, Tao Wang, Fu Hui, Kai-Lin Yang, Jiazhen Li, Ma Lei
Keywords: Blasting; Blasting crater radius; Explosive weight; Ice cover; Ice jam;
Abstract: Ice cover or ice jam blasting with explosives is an important measure for ice flood mitigation. In order to conduct a successful blasting, it is the key to properly determine the relations between varies parameters including radius of the blasting crater, amount of the explosive, the water depth and the thickness of the ice cover. Field experiments have been conducted to study ice breaking process with explosive in the upper reach of the Heilongjiang River (Amur River) for several years. A theoretical model was developed to correlate the blasting crater radius and the thickness of the ice cover, the water depth below the ice cover, and the explosive weight. The blasting crater radius determined by the proposed equation result in average errors of less than 8.5% when compared with the measured data. This equation was applied on ice blasting with explosives in the Mohe reach of the Heilongjiang River in 2015-2017, which successfully prevented ice jam from occurring during river breakup. This research provides scientific basis for ice breaking with explosives to prevent river ice disaster in cold regions.