A case study of ground control problems related to multiple seam mining in the Pittsburgh and Sewickley coalbeds
Conference
·
OSTI ID:7230685
The Bureau of Mines, U.S. Department of Interior, is currently investigating strata interactions associated with the mining of multiple coalbeds. Strata interactions due to subsidence are a result of undermining. This study involves underground investigations at a mine where room and pillar panels are actively being developed through an area of the Sewickley Coalbed which was subsided by undermining of the Pittsburgh Coalbed. Research to date indicates that undermining had little effect on upper mine pillar stability, but had a more severe effect on the development and maintenance of entries. Roof-to-floor measurements recorded over four times more convergence in entries developed over gob as compared with entries developed over support pillars in the lower mine. Consequently, this has led to major roof falls in the active panels, resulting in considerable production delays and supplemental roof support costs.
- OSTI ID:
- 7230685
- Report Number(s):
- CONF-851054-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
CAVING
COAL DEPOSITS
COAL MINING
COAL SEAMS
FEDERAL REGION III
GEOLOGIC DEPOSITS
GROUND SUBSIDENCE
MINE ROADWAYS
MINERAL RESOURCES
MINING
NATIONAL ORGANIZATIONS
NORTH AMERICA
PANELS
PENNSYLVANIA
PRODUCTION
RESEARCH PROGRAMS
RESOURCES
ROOFS
ROOM AND PILLAR MINING
STABILITY
STRATA CONTROL
SUPPORT PILLARS
TUNNELS
UNDERGROUND FACILITIES
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS
USA
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
CAVING
COAL DEPOSITS
COAL MINING
COAL SEAMS
FEDERAL REGION III
GEOLOGIC DEPOSITS
GROUND SUBSIDENCE
MINE ROADWAYS
MINERAL RESOURCES
MINING
NATIONAL ORGANIZATIONS
NORTH AMERICA
PANELS
PENNSYLVANIA
PRODUCTION
RESEARCH PROGRAMS
RESOURCES
ROOFS
ROOM AND PILLAR MINING
STABILITY
STRATA CONTROL
SUPPORT PILLARS
TUNNELS
UNDERGROUND FACILITIES
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS
USA