Energy Citations Database

Bibliographic Citation

 
Document
For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field.
For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability.
Title Method of underground gasification of a series of gently dipping and inclined coal seams
Creator/Author Kazak, V.N. ; Kapralov, V.K. ; Volk, A.F.
Publication Date1986 Sep 09
OSTI IdentifierOSTI ID: 5308958
Report Number(s)US 4610303
Resource TypePatent
Resource RelationPat. File: Filed date 16 Nov 1984
Subject010404 -- Coal, Lignite, & Peat-- Gasification; IN-SITU GASIFICATION-- INJECTION WELLS; BOREHOLE LINKING;CAVING;COAL GASIFICATION;COAL MINING;COAL SEAMS;COMBUSTION;DEPTH;INCLINATION;RECOMMENDATIONS;ROCK DRILLING;SAFETY;THICKNESS
Related SubjectCHEMICAL REACTIONS;COAL DEPOSITS;DIMENSIONS;DRILLING;GASIFICATION;GEOLOGIC DEPOSITS;IN-SITU PROCESSING;MINERAL RESOURCES;MINING;OXIDATION;PROCESSING;RESOURCES;THERMOCHEMICAL PROCESSES;WELLS
Description/Abstract A method is described of underground gasification of a series of gently dipping and inclined coal seams comprising the steps of: determining the depth of occurrence and the thickness of each coal seam in a series; determining a safe mining depth for each coal seam in the series; opening the coal seams by drilling operating injection and production wells; interconnecting the drilled operating wells within the seam to be gasified; setting the coal afire and establishing gasification passages within the coal seam; gasifying each subsequent seam on completion of gasification of the preceding seam by supplying a gaseous medium into the first wells and removing the produced gas from the second wells, the gasification being effected upwards from the underlying seam to the overlying seams with a rock thickness therebetween exceeding a safe mining depth for the underlying seams or downwards from the overlying seam to the underlying seams with a rock thickness therebetween being smaller than the safe mining depth of the underlying seams.^The gasification of the subsequent seam is effected after the rock overlying the gasified seam is no longer shifted.^The shift thereof is associated with the gasification, a firing boundary of the underlying seam being shifted towards a coal pillar by an amount equal to or greater than a first spacing of rock caving in the roof of the gasified seam.
Country of PublicationUnited States
LanguageEnglish
FormatPages: v
RightsVsesojuznoe Nauchno-Proizvodtvennoe Obiedinenie ``Sojuzpromgaz``
System Entry Date2001 May 13

Top