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Development and Evaluation of Near-mine Stimulation Techniques for Coalbed Degasification.

Authors
Murrie-GW; Popp-JT; McCulloch-CM; Steele-DJ
Source
NTIS: PB 84-220664 Available for Reference At Bureau Libraries :127 pages
Link
NIOSHTIC No.
10004030
Abstract
The purpose of this project was to determine the effects of foam stimulation treatments on mining conditions in underground coal mines. Underground investigations were conducted to characterize the geological and mining conditions both before and after tee holes were stimulated. Of 12 holes that were drilled at minesites in Kentucky, Pennsylvania, Utah, and West Virginia, 4 were mined through and mining progressed within 75 ft of a fifth before mining plans were altered because of unassociated reasons. The fracture fluids were tagged with fluorescing paint pigments to enable their underground pathways to be detected with an ultraviolet light and accurately mapped. At the holes that were intercepted by mining, the induced fractures were all contained within the coal seams. Horizontal fracturing at the seam-roof interface and along an inseam binder was more extensive than the vertical fracturing, which was confined primarily to the more friable portion of the seam. The mining conditions, roof, floor, and support requirements were unaffected by the stimulation treatments.
Publication Date
19840101
Document Type
CP; Final Contract Report;
Fiscal Year
1984
NTIS Accession No.
PB84-220664
NTIS Price
A08
Identifying No.
OFR 135-84
NIOSH Division
PRC;
Source Name
NTIS: PB 84-220664. Available for Reference At Bureau Libraries
State
KY; PA; UT; WV;
Performing Organization
Dames & Moore
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