04440224 is referenced by 179 patents and cites 18 patents.

For mining combustible minerals a plurality of boreholes are drilled in a gasifiable seam, e.g., in a coal bed, said boreholes 1 through 4 being intercommunicated by a number of gasification ducts. Then the combustible mineral is initiated to fire, and an oxygen-containing blast gas is blown through some of said boreholes into the gasification ducts, with the result that the generator gas is formed. Simultaneously a carbon- and/or hydrogen-containing blast gas is blown through other boreholes situated along the flow of the generator gas to enrich the latter with combustible ingredients. As a result some chemical reactions proceed under the effect of heat produced by the generator gas, whereby additional amounts of combustible elements are formed which add to the calorific value of the generator gas being withdrawn. The method is instrumental also in controlling the composition of the generator gas withdrawn by varying the ratio of the components of the blast gas enriching the generator gas.

Title
Method of underground fuel gasification
Application Number
6/262071
Publication Number
4440224
Application Date
June 21, 1979
Publication Date
April 3, 1984
Inventor
Nikolai A Fedorov
Moscow
SU
Kirill N Zvyagimtsev
Moscow
SU
Efim V Kreinin
Moscow
SU
Agent
Steinberg and Raskin
Assignee
Vesojuzny Nauchno Issledovatelsky Institut Ispolzovania Gaza V Narodnom Khozyaistve I Podzemnogo Khranenia Nefti Nefteproduktov I Szhizhennykh Gazov
SU
IPC
E21B 43/30
E21B 43/243
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