Freeze-Thaw Effects on Stability of Open Pit Slope in High-Altitude and Cold Regions

Table 3

Corresponding relationship between rock uniaxial compressive strength, rock hardness, and rock freeze-thaw correction coefficients.

Rock uniaxial compressive strength
Rock types	Hard rock	Relatively hard rock	Relatively soft rock	Soft rock	Special soft rock
Freeze-thaw correction coefficients (δ)	≥0.9	0.7­0.9	0.5­0.7	0.2­0.5	≤0.2