Determining horizontal displacement and strains due to subsidence.
Authors
Tandanand-S; Powell-LR
Source
Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 9358, 1991 Jan; :1-9
Abstract
Horizontal displacements and ground strains induced by mine subsidence are significant information needed for calculating damage and developing precautions against subsidence effects on surface structures. To devise a simple method for determining the surface horizontal displacements and strains simultaneously with the subsidence prediction, the U.S. Bureau of Mines examined the significance of the tilt number, which is the proportionality constant in the relationship between the horizontal displacement and the slope of the subsidence profile. The ratio of the tilt number to the critical radius of the subsidence trough is identical to the ratio of the maximum possible horizontal displacement to the full subsidence, which is found to be constant in most European coalfields. If this ratio is known for a particular minesite in the United States, then horizontal displacement and ground strains can be readily obtained from the primary subsidence data.
Keywords
Displacement; Coal-mines; Mining-engineering; Settlement-structural; Mass-movementsgeology; Slopes; Rock-mechanics; Soil-mechanics; Strains; Subsidence; Coal-mining
Document Type
IH; Report of Investigations
NTIS Accession No.
PB91-224972
Source Name
Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 9358
