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Degasification of the Mary Lee coalbed near Oak Grove, Jefferson County, Ala.,by vertical borehole in advance of mining

Rotary drilling holes in coalbeds for degasification

Hydraulic stimulation increases degasification rate of coalbeds

Determining cleat orientation of deeper coalbeds from overlying coals

Methane gas content of the Mary Lee group of coalbeds, Jefferson, Tuscaloosa, and Walker Counties, Ala.

Published Year

1970-1979 (5) *

Subject

Author