Investigation of Pressure Relief Borehole Effects Using In Situ Testing Based on Distributed Optical Fibre Sensing Technology

Table 3

Statistics of strain between two boreholes versus the borehole spacing.

Spacing of borehole (mm)	0.5	0.6	0.7	0.8	0.9	1.0
Diameter of borehole (mm)	108	108	108	108	108	108
Maximum strain (με)	157	142	123	24	−16	−22