Roof support Yurmash 4U-12/25
This chock-shield supports are designed to mechanically strengthen and control the roof including the heavy ones according to the rock pressure manifestation to ensure a safe working face area as well as advance longwall conveyors as coal is worked out in the fat and steep beds of up to 35 degrees while a face advances to the strike and to 12 degrees to the rise/dip. The support is outftted with devices to anchor and secure roof support units as well as adjust and route face conveyers.
Specifcation |
МКYU.4U.46 |
МКYU.4U.50 |
|---|---|---|
Closed height, mm min |
1230 |
1350 |
Extended height, mm max |
2530 |
2700 |
Support resistance, kN/m2 |
1150 |
1140 |
Advance increment, mm |
800 |
|
Unit installation spacing, mm |
1500 |
|
Base type |
Mobile catamaran |
Rigid catamaran |
Canopy type |
Articulated cantilever |
Rigid beam |
Number of hydraulic legs |
4 |
|
Leg type |
Double telescopic, hydraulic |
|
Piston diameter, mm |
250 |
|
Check valve actuation pressure, MPa |
42 |
|
Working pressure, MPa |
32 |
|
Setting load ratio |
0,76 |
|
Average ground pressure, MPa |
2,8 |
2,6 |
Advancing pattern |
Advancing |
Retreating |
Advance force (nominal), kN:
|
|
|
Service life of steel works, cycle |
30000 |
45000 |
Support control type |
Electrohydraulic or manual pilot control |
|
Overall dimensions in transport position, mm:
|
|
|
Mass,t |
13,5 |
15.5/15,8* |
*with a sliding canopy