Table 2 Results of shear test.

From: Research on the characteristics and mechanism of bottom expansion backfilling anchoring reinforcement in fractured surrounding rock roadway

Normal pressure/MPa

Maximum shear stress/MPa

Residual shear stress/MPa

Rock specimens

Grouted rock specimens

Grout solid specimens

Rock specimens

Grouted rock specimens

Grout solid specimens

2

3.4

4.3

7.5

2.1

2.4

1.6

4

6.2

7.4

11.2

3.8

3.6

3.5

6

8.7

8.4

14.0

5.5

5.1

4.8

8

10.8

9.8

16.5

6.4

6.6

5.9

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