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Directional properties of coal and their utilization in underground gasification experiments.

Authors
Komar-CA; Overbey-WK Jr.; Pasini-J III
Source
NTIS: N74 12159 :1-11
Link
NIOSHTIC No.
10009797
Abstract
Renewed interest in the underground gasification of coal evolves from comprehensive studies of earth fracture systems that indicate that the movement of fluids can be controlled in the coalbed. In particular, directional property studies of natural microfissure occurrence, permeability, ultrasonic velocity, tensile strength and orientation of intervals of inherent rock weakness, together with geologic structure setting and fracture trace analysis, can predict the gaseous flow paths in the coalbed. Having this information, the dominant direction in which gases generated and/or liberated by heat would move can be determined so that appropriate well patterns can be developed. Together with advances made in drilling technology that permit long horizontal holes to be drilled through the coal seams, tests can be conducted to determine whether dirctional control will permit devolatilization of the coalbed and gasification of the remaining hot coke in a systematic manner to produce a low- btu gas suited for the generation of electricity.
Publication Date
19730101
Document Type
IH
Fiscal Year
1973
NTIS Accession No.
N74 12159
NTIS Price
A03
Identifying No.
TPR 73
NIOSH Division
MERC
Source Name
NTIS: N74 12159
State
WV
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