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Humidity: A Cyclic Effect in Coal Mine Roof Stability.


PB283741

Publication Date 1978
Personal Author Stateham, R. M.; Radcliffe, D. E.
Page Count 24
Abstract Climatic conditions are compared to roof fall occurrence from April 1, 1972 to December 31, 1975. These comparisons indicate that humidity has a strong influence on roof fall occurrence rates. Cubic regression techniques are used to develop best fit curves. Statistical analysis of these curves indicate that both are sinusoidal and exhibit positive correlation to each other. The sine waves have a period of 1 year with maximum and minimum inflection points in August and February respectively.
Keywords
  • Coal mines
  • Roofs
  • Humidity
  • Stability
  • Periodic variations
  • Regression analysis
  • Atmospheric pressure
  • Roof falls
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 48A - Mineral Industries
Corporate Authors Bureau Of Mines, Denver, Colo. Denver Mining Research Center.
Document Type Technical Report
Title Note Rept. of investigations.
NTIS Issue Number 197823
Humidity: A Cyclic Effect in Coal Mine Roof Stability.
Humidity: A Cyclic Effect in Coal Mine Roof Stability.
PB283741

  • Coal mines
  • Roofs
  • Humidity
  • Stability
  • Periodic variations
  • Regression analysis
  • Atmospheric pressure
  • Roof falls
  • Bureau of Mines
  • 48A - Mineral Industries
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