Modified blast hole blocking material applied to strip mine blasting and preparation method

The invention discloses a modified blast hole blocking material applied to strip mine blasting and a preparation method, and belongs to the technical field of mine blasting. The modified blast hole blocking material comprises the following components in percentage by mass: 60% of rock powder, 17% of slag, 3% of NaOH solution with the mass fraction of 30%, 12% of water glass with the modulus of 3.2 and 8% of water. The preparation method comprises the steps of proportioning, primary screening, mixing and stirring and additive mixing. According to the modified blast hole blocking material applied to strip mine blasting and the preparation method thereof, a traditional rock powder blocking material is replaced, and the modified blast hole blocking material has the advantages of being low in manufacturing cost, good in environmental protection performance and wide in source range. The material is simple in preparation step, short in maintenance time, high in early strength and capable of rapidly achieving the bla