Research on Formation Identification Based on Drilling Shock and Vibration Parameters and Energy Principle

Table 7

Classification and compressive strength of weathered granite.

Rock classification	Degree of weathering	Compressive strength (MPa)
VI (fill)	Fill soil	0.06
V	Fully weathered	0.7
V/VI	Fully weathered-highly weathered	12.92
IV (concrete)	Reference height weathering	28.44
IV	Highly weathered	35.85
IV/III	Highly weathered-medium weathered	52.76
III	Moderate weathering	67.62
III/II	Medium weathering-light weathering	86.81
II	Light weathering	100.36
II/I (vein)	Slightly weathered-unweathered	115.78