Analysis on Force Transmission Characteristics of Two-Legged Shield Support under Impact Loading

Table 1

The main parameters of the doubly telescopic leg.

Name of the project	Top stage	Bottom stage	Mobile column
Structure length (mm)	/	/	2747
Initial emulsion length (mm)	/	2113	2197
Quality	2.1	1.9	1.276
External/internal diameter (mm)	625/530	500/380	355
Setting/yielding pressure (MPa)	37.5/47.6	34/92.6	/
Modulus of elasticity (GPa)	196 (20°C)
Poisson’s ratio	0.3