EXPLOSIVE COMPOSITIONS FOR USE IN REACTIVE SOIL AND RELATED METHODS Russian patent published in 2022 - IPC C06B31/28 C06B31/06 

FIELD: explosives.

SUBSTANCE: method for detonation in high-temperature soil, reactive soil, or both types of soil provides for placement of an explosive composition containing an emulsion explosive including a continuous organic fuel phase and a dispersed oxidizing phase in soil to be detonated to provide contact of the explosive composition with soil. The dispersed oxidizing phase contains from 3% to 35% by weight of one or more nitrates of group I or group II. Soil contains reactive soil, high-temperature soil, or both types of soil. The emulsion explosive is left dormant for a period of time from 3 hours to three months. The detonation of the emulsion explosive is carried out in a controlled manner after the specified period of time. The explosive composition intended for use in high-temperature soil, reactive soil, or both types of soil contains an emulsion including a continuous organic phase containing fuel oil, a dispersed oxidizing phase containing carbamide, wherein carbamide is from 0.5% to 35% by weight of the dispersed oxidizing phase, as well as nitrate not belonging to group I or group II and one or more nitrates of group I or group II. Nitrates of group I or group II are from 3% to 35% by weight of the dispersed oxidizing phase, where the weight ratio of ammonium nitrate and one or more nitrates of group I or group II ranges from approximately 6:1 to 9:1. The formation of a mixture for blasting in high-temperature soil, reactive soil, or both types of soil provides for mixing of a suspension containing ammonium nitrate and fuel oil with an emulsion. The emulsion contains a continuous organic phase containing fuel oil and a dispersed oxidizing phase containing carbamide, wherein carbamide is from 0.5% to 35% by weight of the dispersed oxidizing phase, as well as nitrate not belonging to group I or group II; and one or more nitrates of group I or group II, wherein one or more nitrates of group I or group II is from 3% to 35% by weight of the dispersed oxidizing phase.

EFFECT: controlled detonation is provided, i.e., reduction in the risk of undesirable exothermic effects and/or premature detonation.

28 cl, 8 dwg