Aston, T. R. C., M. C. Bétournay, J. D. Hill, and F. Charette. 1994.
Application of TDR for Monitoring the Long Term Behaviour of Canadian Abandoned Metal Mines.
Proceedings of the Symposium on Time Domain Reflectometry in Environmental, Infrastructure, and Mining Applications, Evanston, Illinois, Sept 7-9, U.S. Bureau of Mines, Special Publication SP 19-94, NTIS PB95-105789, pp. 518-527
(posted June 7, 1996)

To support an ongoing program for the evaluation of shallow stope and surface crown pillar behaviour, which encompasses empirical, analytical and numerical components, the CANMET - Mining Research Laboratories are utilising Time Domain Reflectometry (TDR) as a standard monitoring technique within its inactive mines program. Time Domain Reflectometry has proven a valuable tool for monitoring the behaviour of rock masses over a shallow mine workings, since it can locate and monitor shear and shear/tension responses. After presenting an overview of the shallow stope and surface crown pillar program, a series of case studies as briefly summarised, which are drawn from sites located in Ontario and Nova Scotia. Finally, the integration of TDR generated data with other standard rock mechanics techniques, such as rock mass characterization and numerical modeling are also discussed.