The invention provides a high-power class-3
coal mine permissible water-gel explosive. The explosive is prepared from the following substances in parts by weight: 25-32 parts of an
ammonium nitrate solution having the concentration of 72%-82%, 35-40 parts of a
methylamine nitrate solution having the concentration of 83%-86%, 9-15 parts of
solid ammonium nitrate, 8-12 parts of
sodium nitrate, 0.8-1.5 parts of a gelatinizing agent, 0.1-0.3 part of a cross-linking agent, 2-4 parts of a sensitizer and 5-10 parts of a
flame inhibitor, as well as 0.02-0.04 part of a high-performance
flame inhibitor. The production method of the explosive comprises the following steps: firstly, preparing the
methylamine nitrate solution and the
ammonium nitrate solution, then orderly adding the
methylamine nitrate solution, the
ammonium nitrate solution, the
solid ammonium nitrate, the
sodium nitrate, the gelatinizing agent, the
flame inhibitor, the sensitizer and on the like to a
mixing tank, and adjusting the density to the range of 1.05-1.15g / cm<3> and controlling the pH value within the range of 5.0-5.8 after mixing evenly; next, adding the cross-linking agent, thereby obtaining the high-power class-3
coal mine permissible water-gel explosive. The production method of the high-power class-3
coal mine permissible water-gel explosive has the advantages of simple production process and low production cost; the explosive is stable in performance, the coal mine gas safety is high, the explosive capacity is big, and the blasting operation effect is improved.