Terminating persistent underground coal fires

Details Terminating persistent underground coal fires Terminating persistent underground coal fires

1985-06-04

1987-02-10

Peters, Jr., Joseph F.

Fire extinguishers

Processes

With mixing of extinguishing compounds

169 46, 169 64, 405128, 405258, A62C 112, A62C 302

Patent

active

046417117

ABSTRACT:
A series of specialty formulations of foaming mud cement are injected into an underground cavity containing an active coal fire. The fire is smothered and terminated with a blanket of foaming mud cement that sets into a cellular concrete. The lower section of the backfill involves a formulation of foaming mud cement containing materials conducive to heat transfer, thus forming a heat sink for dispersion of elevated temperature associated with the fire. The backfill continues to complete cavity fill using a formulation of foaming mud cement wherein the aggregate is composed of hazardous waste materials that are permanently stored within the cellular concrete.

REFERENCES:
patent: 3421587 (1969-01-01), Heavilon et al.
patent: 3500934 (1970-03-01), Magnuson
patent: 3852967 (1974-12-01), Stewart et al.
patent: 3927719 (1975-12-01), Maser
patent: 4102397 (1978-07-01), Terry
patent: 4237182 (1980-12-01), Fulmer et al.
patent: 4437520 (1984-03-01), Stoddard et al.

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