Experimental Study of the Failure Mechanism of the Anchorage Interface under Different Surrounding Rock Strengths and Ambient Temperatures

Table 4

Damage forms of samples.

(°C)	C20	C40	C60	St
20	C	C	C	P
50	C	C	C	P
70	C	FC	P	P

C is the country rock cracking; P is the bolt pulling out; FC indicates a small number of cracks at the orifice.