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

Table 9

Drilling parameters of hole 2.

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)	0.089	1.231	88	0.115	45.5	0.4026
V	0.758	1.593	122	0.088	39.8	0.5136
V/IV	13.37	2.136	96	0.169	22.9	0.8416
IV (concrete)	28.47	1.873	132	0.196	19.6	0.8106
IV	38.65	2.395	71	0.245	11.9	0.9687
IV/III	52.54	2.486	78	0.336	17.3	1.0312
III	—	—	—	—	—
III/II	76.369	2.893	165	0.268	10.3	1.13621
II	99.163	5.425	278	0.361	4.9	1.4896
II/I (vein)	117.8	4.962	225	0.268	2.8	1.7169