Influence of Elevation on Slake Durability Index of Quartz Mica Schist: A Case Study of East Slope of Manjiazhai Open Pit

Table 1

Test results of rock collapse resistance at different elevations.

Sampling elevation (m)	Slake durability index under different cycles (%)							Lithological description
	The first cycle	The second cycle	The third cycle	The fourth cycle	The fifth cycle	The sixth cycle	The seventh cycle
1040	99.85	99.76	99.65	99.52	99.36	99.22	99.01	Quartz mica schist
1080	99.8	99.59	99.34	99.08	98.89	98.67	98.47	Quartz mica schist
1120	99.7	99.21	98.76	98.34	98.02	97.66	97.54	Quartz mica schist
1170	99.37	98.45	97.86	97.34	97.02	96.72	96.6	Quartz mica schist
1230	98.67	98.08	97.34	96.9	96.45	96.13	96.03	Quartz mica schist
1280	97.95	96.91	96.26	95.76	95.26	94.51	94.42	Quartz mica schist
1310	95.8	94.58	93.68	93.22	93.12	92.26	92.02	Quartz mica schist