Longwall gob degasification with surface ventilation boreholes above the lower Kittanning coalbed. Report of investigations

Technical Report · Mon Nov 01 04:00:00 EST 1976

OSTI ID:7314519

Moore, Jr, T D; Deul, M; Kissell, F N

Methane emission from two surface gob-degasification boreholes was measured during mining of a 3,200-ft longwall panel in the Lower Kittanning coalbed in central Pennsylvania. The first hole was 500 feet, and the second hole was 2,200 feet from the start of mining. The first hole went on natural draft as soon as the longwall face passed it. This caused the methane flow in the return entries to drop 75%. In the six months required to complete the panel, the two holes produced 69 million cubic feet of methane in varying precentages of concentration in air. In 3 years, they produced a total of 150 million cubic feet of methane.

• Research Organization: Bureau of Mines, Pittsburgh, PA (USA). Pittsburgh Mining and Safety Research Center
• OSTI ID: 7314519
• Report Number(s): PB-262189; BM-RI-8195
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
016000 -- Coal
Lignite
& Peat-- Health & Safety
ACCIDENTS
ALKANES
BOREHOLES
CAVITIES
CENTRAL REGION
COAL MINES
COAL MINING
CRYOGENIC FLUIDS
DEGASSING
FLUID FLOW
FLUIDS
GAS FLOW
HYDROCARBONS
LONGWALL MINING
METHANE
MINES
MINING
NORTH AMERICA
ORGANIC COMPOUNDS
PENNSYLVANIA
UNDERGROUND MINING
USA
VENTILATION