High-safety emulsion explosive for coal mine

Abstract

The invention relates to high-safety emulsion explosive for a coal mine. The explosive comprises the following raw materials: ammonium nitrate, sodium nitrate, calcium nitrate, sensitizing agent, urea, compound flame inhibitor, water, compound emulsifier, a compound oil phase, foaming agent, foaming accelerating agent and expanded perlite; and the preparation steps of the high-safety emulsion explosive are as follows: preparing a water phase, preparing the oil phase, emulsifying, cooling, sensitizing and charging and packaging.The explosive performance accords with the GB18095-2000 standard, a mine-gas-safety test shows that the test reading is 250g, 0 / 5 when any flammable item is suspended, the mine gas does not ignite gas, and the safety level of the explosive is one grade higher than that of the explosive for three-grade coal mines with the highest grade in China; and on the premise of ensuring the safety of combustible gas, a new formula with the compound flame inhibitor, the compound foaming agent and ethanolamine nitrate or potassium nitrate added as the sensitizing agent is adopted, thus, the initiation sensitivity of the explosive is improved, the anti-deflagrability capability of the explosive is enhanced, and the safe production of the coal mine is better ensured.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety production, and in particular relates to an emulsion explosive for coal mines. Background technique [0002] Permissible explosives in coal mines are an important part of industrial explosives in my country. They are classified according to the conditions of use of industrial explosives and are specially designed for use in underground coal mines where there is a risk of combustible gas and coal dust explosions. At present, in my country's coal mines, especially small and medium-sized coal mines and township coal mines, most of them still use blasting coal mining, which provides a market and development prospects for coal mines. Permitted explosives are advancing rapidly. [0003] At present, the types of explosives allowed in coal mines in my country mainly include ammonium ladder explosives allowed in coal mines, water gel explosives allowed in coal mines and emulsion explosives allowed...

AI Technical Summary

Problems solved by technology

The powdered ammonium antimony explosives allowed in coal mines have weak water resistance and low safety, and more than 10% TNT must be added to this ammonium nitrate explosive to ensure its explosive performance. TNT is a toxic elemental explosive. It pollutes the environment and endangers human health. In addition, ammonium nitrate has strong hygroscopicity and agglomeration, which leads to the disadvantages of ammonium ladder explosives allowed in coal mines that are easy to absorb moisture and agglomerate, which seriously affects safe use. The same type of coal mines are allowed to be replaced by emulsion explosives; although water gel explosives have the advantages of simple production process, high safety performance of combustible gas, high power, good water resistance, and good blasting effect in water holes, the main raw material of water gel explosives is The price is high, the output is small, and its safety level can reach the third level at most; the source of raw materials of emulsion explosives is wide, the cost is low, and it does not contain TNT which is harmful to human body, and it is in line with the planning direction of the national civil explosive product industry development. It also has the advantages of good explosive performance, strong water resistance, reliable detonation, less toxic gas produced after explosive explosion, which is beneficial to reduce the physical harm to underground production operators and high safety in use, and has become the most promising coal mine explosive in China at present. safety explosives, but the highest level of safety for emulsion explosives currently used in coal mines in China is level three, compared with foreign countries, its safety level can at most reach the foreign medium safety level