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Title: Method for gasification of deep, thin coal seams. [DOE patent]

Abstract

A method of gasification of coal in deep, thin seams by using controlled bending subsidence to confine gas flow to a region close to the unconsumed coal face is given. The injection point is moved sequentially around the perimeter of a coal removal area from a production well to sweep out the area to cause the controlled bending subsidence. The injection holes are drilled vertically into the coal seam through the overburden or horizontally into the seam from an exposed coal face. The method is particularly applicable to deep, thin seams found in the eastern United States and at abandoned strip mines where thin seams were surface mined into a hillside or down a modest dip until the overburden became too thick for further mining.

Inventors:
Issue Date:
OSTI Identifier:
6786858
Assignee:
TIC; ERA-06-019626; EDB-81-060353
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; IN-SITU GASIFICATION; CONTROL; GROUND SUBSIDENCE; ABANDONED SITES; BOREHOLE LINKING; COAL GASIFICATION; COAL SEAMS; DEPTH; DIRECTIONAL DRILLING; SURFACE MINING; THICKNESS; COAL DEPOSITS; DIMENSIONS; DRILLING; GASIFICATION; GEOLOGIC DEPOSITS; IN-SITU PROCESSING; MINERAL RESOURCES; MINING; PROCESSING; RESOURCES; THERMOCHEMICAL PROCESSES 010404* -- Coal, Lignite, & Peat-- Gasification

Citation Formats

Gregg, D.W. Method for gasification of deep, thin coal seams. [DOE patent]. United States: N. p., 1980. Web.
Gregg, D.W. Method for gasification of deep, thin coal seams. [DOE patent]. United States.
Gregg, D.W. Fri . "Method for gasification of deep, thin coal seams. [DOE patent]". United States.
@article{osti_6786858,
title = {Method for gasification of deep, thin coal seams. [DOE patent]},
author = {Gregg, D.W.},
abstractNote = {A method of gasification of coal in deep, thin seams by using controlled bending subsidence to confine gas flow to a region close to the unconsumed coal face is given. The injection point is moved sequentially around the perimeter of a coal removal area from a production well to sweep out the area to cause the controlled bending subsidence. The injection holes are drilled vertically into the coal seam through the overburden or horizontally into the seam from an exposed coal face. The method is particularly applicable to deep, thin seams found in the eastern United States and at abandoned strip mines where thin seams were surface mined into a hillside or down a modest dip until the overburden became too thick for further mining.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {8}
}