How to prevent blowout shoots?

Although it s highly unlikely, the mortar might blow out from the filled holes violently if the following instructions have not been followed correctly:
1. Using correct type of STONE-TECH according to the temperature.
2. Too large hole diameter may result in blowout.
3. Too shallow holes may result in blowout. Depth must be 4 times longer than its diameter or more.
4. Lots of dry dust in holes will absorb water from mortar and result in blowout.
5. Cooling STONE-TECH powder, water, mixing tools before mixing while the temperature is higher than the requirements.
6. Using enough water and mixing thoroughly to avoid lump formation.
7. Do not mix manually more than 10kg (2 bags) for each lot.
8. Pour the mixture into holes within 10 minutes after mixing.
9. Do not overfill the holes.
10. Do not plug filled holes with bars or similar tools.