A modified version of the geomechanics classification for entry design in underground coal mines
Conference
·
OSTI ID:7054860
The Geomechanics Classification was modified for entry and roof support design in underground room-and-pillar coal mines. Adjustment multipliers were introduced to incorporate the influence of strata weatherability, high horizontal stresses, and the roof support reinforcement factor into the existing classification system. Sixty-two case histories of both standing and fallen mine roof were collected from two mines in the northern Appalachian coalfield. Twenty-seven engineering and geologic parameters were recorded for each case. A partial correlation analysis was carried out on the cases to establish which parameters have a significant impact upon the supported stand-up time of coal mine roof. Survival analysis, a statistical technique used in medical research to assess the effect of a drug or treatment on a patient's life expectancy, was conducted together with stepwise multiple regression to derive values for the adjustment multipliers. A practical example is included to illustrate the application of the modified Geomechanics Classification to underground coal mine design.
- OSTI ID:
- 7054860
- 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-)
APPALACHIA
CAVING
CLASSIFICATION
COAL MINES
DESIGN
ENGINEERING
ENGINEERING GEOLOGY
EQUIPMENT
GEOLOGY
GEOPHYSICS
MATERIALS
MATHEMATICS
MINES
MINING
MINING ENGINEERING
MINING EQUIPMENT
NORTH AMERICA
PARAMETRIC ANALYSIS
REGRESSION ANALYSIS
REINFORCED MATERIALS
ROOF BOLTS
ROOM AND PILLAR MINING
STATISTICS
STRATA CONTROL
STRESSES
UNDERGROUND FACILITIES
UNDERGROUND MINING
USA
WEATHERING
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
APPALACHIA
CAVING
CLASSIFICATION
COAL MINES
DESIGN
ENGINEERING
ENGINEERING GEOLOGY
EQUIPMENT
GEOLOGY
GEOPHYSICS
MATERIALS
MATHEMATICS
MINES
MINING
MINING ENGINEERING
MINING EQUIPMENT
NORTH AMERICA
PARAMETRIC ANALYSIS
REGRESSION ANALYSIS
REINFORCED MATERIALS
ROOF BOLTS
ROOM AND PILLAR MINING
STATISTICS
STRATA CONTROL
STRESSES
UNDERGROUND FACILITIES
UNDERGROUND MINING
USA
WEATHERING