Bending Properties of Short-Cut Basalt Fiber Shotcrete in Deep Soft Rock Roadway

Table 6

Crack development law of BF shotcrete square slabs.

Content of BF (kg/m^3)	Specimen	Maximum width of initial crack (mm)	Average value	Crack reduction rate (%)	Limit crack width (mm)	Average value	Crack reduction rate (%)	Maximum crack width (mm)	Average value	Crack reduction rate (%)
0	S1-1	0.18	0.19	—	0.28	0.28	—	0.28	0.28	—
	S1-2	0.19			0.26			0.26
	S1-3	0.20			0.30			0.30
3	S2-1	0.18	0.18	5.3	0.25	0.25	10.7	0.28	0.27	3.6
	S2-2	0.19			0.23			0.25
	S2-3	0.18			0.26			0.28
4.5	S3-1	0.13	0.14	26.3	0.18	0.19	32.1	0.22	0.22	21.4
	S3-2	0.14			0.20			0.23
	S3-3	0.14			0.18			0.20
6	S4-1	0.16	0.15	21.1	0.21	0.23	17.9	0.24	0.26	7.1
	S4-2	0.14			0.23			0.26
	S4-3	0.15			0.24			0.28