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Foundation response to subsidence-induced ground movements : a case study
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Description:"The purpose of this U.S. Bureau of Mines effort was to determine if mining-induced ground movement is directly transferred to a structure, and how that process takes place. A series of four concrete block walls with foundations were constructed and monitored over an active longwall panel as part of a comprehensive subsidence research program. Three of the four walls were located perpendicular to the advance of the longwall face, in the zones where maximum inclination, maximum tension, and maximum curvature were predicted. The fourth wall was constructed along the centerline of the panel, parallel to the advance of the longwall face. All of the walls and the surrounding ground surface were instrumented with conventional survey monitoring points and extensometer stations to observe the vertical and horizontal movements. The fourth wall also included continuously recording tiltmeters. The results of this investigation indicate that simple structures respond to subsidence in a similar manner as the ground surface, suggesting that once the transfer mechanism is fully defined through further field and laboratory research, prediction models can be developed or modified to allow accurate estimation of the effect of mining on surface structures."
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