Geophysical Time Series Data from a Stressed Environment

As a proxy for stress in mines, passive monitoring from microseismics and active monitoring from
controlled source resistivity survey may be utilized to better understand stress state changes. Repeated
measurements over a continuous period of time are necessary to study any variations in the subsurface
structure due to mining processes and natural events. The controlled source time-lapse surveys must be
repeatable for meaningful studies such that any changes in the data are related to the earth?s response. This
paper presents in-mine geophysical data from passive microseismics and active borehole-to-borehole
resistivity surveys which show promising characteristics for stress monitoring.