Question

A multi point borehole extensometer is used to monitor

• A. Convergence between the roof and the floor
• B. Strain between fixed points along a borehole
• C. Strain between the anchor point and the reference point on the surface
• D. Changing distances between fixed points along a borehole

Hint:

Borehole extensometers track deformation by fixed point displacement measurements.

Answer 1

The Correct Option is D

Multi point borehole extensometers measure displacement or deformation by monitoring changes in distance between fixed points inside a borehole.