Foundation Response to Subsidence Induced by High Extraction Mining in Southern Illinois.
Triplett-TL; Yarbrough-RE; Powell-LR
Proc 27th U S Symp on Rock Mechanics Tuscaloosa, Alabama, 1986 Jun; :283-290
This paper describes the response of two foundations to ground movements induced by subsidence from a high-extraction retreat room- and-pillar operation in southern Illinois. The objective of this monitoring program was to study the interaction between the ground surface and a structure during a subsidence event. The monitoring instrumentation and techniques as they relate to the mining and site conditions are described, including the capability of a tiltmeter to detect and follow the tilt of the foundations caused by the mining subsidence sequence. Using data from this tiltmeter, the development of curvature in the foundations as they conform to the displaced ground surface is shown. This curvature is represented by differneces in tilt as various points on the foundations, indicating a change in tilt over a horizontal distance. Also, even though subsidence damage has not been fully analyzed, preliminary observations of the cracks that formed in the foundations are reported.
Proc. 27th U S Symp. on Rock Mechanics, Tuscaloosa, Alabama, June 23-25, 1986, PP. 283-290