Comprehensive Measurement of the Deformation and Failure of Floor Rocks: A Case Study of the Xinglongzhuang Coal Mine

Figure 5

The increment of axial strain and radial strain of the No. 1 hole.

(a) Axial strain measured by gauge a

(b) Axial strain measured by gauge b

(c) Radial strain measured by gauge c

(d) Radial strain measured by gauge d