Influencing Factors of Interfacial Behavior between Geogrid and Coal Gangue

Table 4

Change in shear stress with shear rate.

Normal stress (kPa)	Shear rate (mm/min)	Maximum shear stress (kPa)	Shear stress increment due to shear rate change (kPa)			Increase in shear stress due to change in shear rate (%)
			1–3	1–5	3–5	1–3	1–5	3–5
50	1	69.8	3.4	10.1	6.7	4.87	14.47	9.15
	3	73.2
	5	79.9
100	1	94.5	14.4	23.6	9.2	15.24	24.97	8.45
	3	108.9
	5	118.1
150	1	117.1	16.8	32.3	15.5	14.35	27.58	11.58
	3	133.9
	5	149.4

Note. 1–3 in Table 4 indicates that the shear rate changed from 1 to 3 mm/min.