Allowable emulsion explosive for coal mine and preparation method thereof

Abstract

The invention discloses an allowable emulsion explosive for coal mines and a preparation method thereof. The emulsion explosive comprises an oil-phase part, a water-phase part and a sensitizing part, wherein the oil-phase part comprises the following raw materials by weight part: 3.5-5.0 parts of special emulsifying grease and 1.5-2.8 parts of emulsifier; the water-phase part comprises the following raw materials by weight part: 60-75 parts of ammonium nitrate, 8-11 parts of sodium nitrate, 5-8 parts of potassium chloride and 9-11 parts of water; and the sensitizing part comprises the following raw materials by weight part: 30-50 parts of aqueous solution of sodium nitrite, 30-35 parts of aqueous solution of phosphoric acid and 8-20 parts of sensitizing accelerating agent. The preparation method comprises the following steps: 1) preparing the oil phase and the water phase; 2) performing emulsifying treatment; 3) performing drug cooling treatment; 4) performing sensitizing treatment; and 5) filling and packaging the drug. The allowable emulsion explosive for coal mines has the characteristics of high explosion speed, high explosive grade, high working capacity, stable performance, long-term storage, and the like.

Description

technical field [0001] The invention relates to an emulsion explosive, in particular to an emulsion explosive permitted in coal mines, and a preparation method of the emulsion explosive. The product prepared by the invention can completely satisfy the blasting engineering use in coal mines such as high-methane mines, low-methane mines and high-methane mining faces, kerosene coexistence mines, coal and coalbed methane outburst mines, and the like. Background technique [0002] Emulsion explosives allowed in coal mines are environmentally friendly industrial explosives containing flame suppressants. has been used extensively. However, in order to improve the emulsifying effect of the emulsifying matrix, the commonly used emulsion explosives in domestic coal mines often use T152, LZ2727B, S-80 and other emulsifying agents or compound emulsifying agents. The prepared emulsifying matrix has high viscosity and poor fluidity. In the subsequent sensitization process, it is not eas...

AI Technical Summary

Problems solved by technology

However, in order to improve the emulsifying effect of the emulsifying matrix, the commonly used emulsion explosives in domestic coal mines often use T152, LZ2727B, S-80 and other emulsifying agents or compound emulsifying agents. The prepared emulsifying matrix has high viscosity and poor fluidity. In the subsequent sensitization process, it is not easy to sensitize uniformly; in addition, in order to adapt to the fully continuous automatic production, most of the sensitization processes in the production process use chemical sensitization. After sensitization, the size and distribution of sensitized bubbles in the emulsified matrix are different Uniform, sensitized bubbles are easy to escape from the emulsified matrix, resulting in low explosive working ability, insufficient stability, and short storage period

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