Method for blocking gas flow in a coal seam

Details Method for blocking gas flow in a coal seam Method for blocking gas flow in a coal seam

1975-01-20

1978-01-03

Gilliam, Paul R.

Mining or in situ disintegration of hard material

Processes

Forming blocks

299 12, E02D 314, E21F 1500

Patent

active

040659275

ABSTRACT:
Gas flow from a coal seam to a mine face in the seam is blocked by drilling a hole from the face into the seam in a direction generally parallel to the direction of the flow of the gas to be blocked; forming a notch at the interior end of the hole; injecting a fluid into the hole and notch under a pressure sufficient to hydraulically fracture the seam along a plane extending substantially perpendicular to the hole and to the direction of gas flow; and filling such fracture with a barrier-forming fluid. The hole is then plugged to prevent retrograde flow of the fluid to the mine face.

REFERENCES:
patent: 3106959 (1963-10-01), Huitt et al.
patent: 3211221 (1965-10-01), Huitt
patent: 3297088 (1967-01-01), Huitt et al.
patent: 3300984 (1967-11-01), Armentrout
patent: 3688507 (1972-09-01), Muller
patent: 3845632 (1974-11-01), Slobod et al.

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