Table 1.

Comparison of important parameters for different shield roof supports

Shield typeSetting force/t (Pressure/MPa)Capacity/t (Pressure/MPa)Set-to-yield ratio (%)Operating range (m)Shield width (m)Shield weight (t)Cylinder diameter (mm)
ZY10800/28/63D791 (31.5)1080 (43.0)73.22.86.3c. 175045400
ZY15000/33/721237 (31.5)1500 (38.2)82.53.37.2c. 2050c. 70500
ZY18800/32.5/72D1237 (31.5)1880 (47.9)65.83.25 7.2c. 205069.5500
ZY26000/40/88D1978 (35.0)2600 (46.0)76.14.08.8c. 240099600