[Retracted] Engineering Application of Nanomaterial and Ferroelectric Domain Polarization to the Dynamic Structure of the Surrounding Rock of Heavy-Duty Railway with Small Clear Intersection Tunnel

Table 5

Physical and mechanical performance parameters of surrounding rock materials in model tests.

Level	Elastic modulus	Capacity	Cohesion	Poisson’s ratio	Friction angle
IV	14	15	0.8	0.28	30
V	18	17.5	1.2	0.39	45