Control of subsidence during underground gasification of coal

Details Control of subsidence during underground gasification of coal Control of subsidence during underground gasification of coal

1986-12-10

1988-05-31

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Processes

Stabilizing underground structure

166256, 166302, E21C 4100

Patent

active

047476427

ABSTRACT:
Disclosed is a process for controlling subsidence during underground gasification of coal. Prior to the complete coal gasification step, holes are provided extending from the bottom to the top of the coal seam and these holes filled with heat resistant support material. Thereafter, the complete gasification process is carried out.

REFERENCES:
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patent: 4067390 (1978-01-01), Camacho et al.
patent: 4198097 (1980-04-01), Fondriest
patent: 4213653 (1980-07-01), Grenia
patent: 4219237 (1980-08-01), Sisemore
patent: 4289354 (1981-09-01), Zakiewicz
patent: 4368921 (1983-01-01), Hutchins

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