PROCESS FOR APPLYING ROCK DUST TO A MINE WALL

摘要

Rock dust is applied to a coal mine wall for mine fire suppression in combination with a chemical foam containing a saturated fatty acid, preferably stearic acid, which imparts hydrophobic properties to the rock dust particles, avoiding agglomeration. The rock dust and foam containing a saturated fatty acid are combined by causing the rock dust and foam to flow through separate conduits to a combiner from which the resulting mixture is caused to flow through a nozzle for application to the mine wall.

主权项

1. A process for applying rock dust to a mine wall comprising:
mixing finely ground limestone powder with a foam containing a composition consisting of one or more saturated fatty acids to produce a resulting mixture of foam and limestone powder; and applying the resulting mixture to the wall of a coal mine.