Analysis of the deterioration process in shaly roof based on field monitoring

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5754612

Unrug, K F; Johnson, C A; Nandy, S K

The research work reported in this paper deals with the monitoring of roof behavior in a drift mine located in Eastern Kentucky operating in the Coalburg Seam. The thickness of the seam at the monitoring site ranges between 9 and 10 feet with the immediate roof changing from sandstone to shale then back to sandstone. To closely observe the contribution of moisture toward roof deterioration the dynamometers were set up in intake and neutral airways. A television borescoping camera was used in conjunction with the dynamometric instrumentations at predetermined observation holes to physically observe and record the separation process of the shale and sandstone stratum with respect to time. Monitoring took place between January 1985 through January 1986 in order to cover a full cycle of dry and wet mine conditions associated with the seasonal changes. Analysis of the data show a trend of roof deterioration induced by condensation and eventual penetration of moisture within the immediate roof bedding planes, leading to rapid disintegration of the mine roof.

• OSTI ID: 5754612
• Report Number(s): CONF-8609178-
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
CAMERAS
CHEMICAL REACTIONS
COAL DEPOSITS
COAL MINING
COAL SEAMS
DECOMPOSITION
DYNAMOMETERS
FEDERAL REGION IV
GEOLOGIC DEPOSITS
GEOLOGIC STRATA
GEOLOGIC STRUCTURES
KENTUCKY
MEASURING INSTRUMENTS
MECHANICS
MINERAL RESOURCES
MINING
MOISTURE
MONITORING
NORTH AMERICA
RESOURCES
ROCK MECHANICS
ROCKS
ROOFS
SANDSTONES
SEASONAL VARIATIONS
SEDIMENTARY ROCKS
SHALES
STRATA CONTROL
TELEVISION
UNDERGROUND MINING
USA
VARIATIONS