Geological Type Recognition by Machine Learning on In-Situ Data of EPB Tunnel Boring Machines

Table 2

Statistical properties of main parameters from the selected section of Tianjin Metro Line 9.

	Advance rate (mm/min)	Cylinder thrust (kN)	Cutter head torque (kNm)	Cutter head rotational speed (r/min)
Max	55.68	24701.68	1706.28	1.1
Min	16.84	10436.07	803.08	0.4
Average	31.53	15840.43	1264.49	0.94
SD	10.04	2905.33	148.71	0.14