Feasibility Study of Salt Encrustation Processes.
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A feasibility study of the use of sodium chloride as an effective and economical method of dust suppression in underground coal mines was conducted. The salt-crust process is being evaluated as an alternative in certain areas of underground mines to the present methods for reducing explosion hazards associated with coal dust in underground coal mining. The development of a free-flowing mixture of sodium chloride has been achieved which will allow its use in the roof, ribs, and floor of a mine by application with gunite machines, bantum dusters, or trickle dusters. A preliminary corrosion study indicates that the rate of corrosion in a sodium chloride environment is acceptable and that the health hazards of a salt environment are not likely to be a factor in its use in underground mines. A literature review shows that sodium chloride can be used to stabilize surface roadway clays, and thus the salt-crust process could be used for the stabilization of underground mine roadways. A cost study indicates that the salt-crust process may be as economical as conventional rock dusting.
CP; Final Contract Report;
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Virginia Polytechnic Institute