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Determining horizontal displacement and strains due to subsidence.

Tandanand-S; Powell-LR

Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 9358, 1991 Jan; :1-9

10009113

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.

Displacement; Coal-mines; Mining-engineering; Settlement-structural; Mass-movementsgeology; Slopes; Rock-mechanics; Soil-mechanics; Strains; Subsidence; Coal-mining

19910101

IH; Report of Investigations

1991

PB91-224972

A03

RI-9358

TCRC

MN

Minneapolis, MN: U.S. Department of the Interior, Bureau of Mines, RI 9358