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

Table 11

Drilling parameters of hole 4.

Rock classification	Compressive strength (MPa)	Axial pressure (kN)	Rotation speed (rad)	Flushing fluid pressure (MPa)	Drilling rate (cm·min^−1)	Torque (kN·m)
VI (fill)	—	—	—	—	—	—
V	0.648	1.269	102	0.098	42.6	0.7156
V/IV	14.29	1.624	116	0.134	29.8	0.7958
IV (concrete)	—	—	—	—	—	—
IV	30.68	2.968	126	0.219	15.6	1.1789
IV/III	51.52	2.189	158	0.394	18.6	0.9136
III	64.98	4.267	263	0.289	17.1	1.5136
III/II	88.263	3.489	215	0.269	9.2	1.3512
II	105.265	6.152	324	0.327	3.6	2.1893
II/I (vein)	—	—	—	—	—	—