Roof support Yurmash 2U-12/25
The YURMASH 2U-12/25 chock-shield support is designed to mechanically strengthen and control the roof including the heavy ones according to the rock pressure manifestation, ensure a safe working face area by the top caving-in method and advance the longwall conveyor as coal is worked out in the fat and steep beds of up to 15 degrees while a face advances to the strike and to 10 degrees to the rise/dip. The support is outftted with a device to anchor, secure roof support units as well as adjust and route face conveyers.
Side-flaps can extend to 200 mm.
Beams have specially designed pockets for working lighting.
The original design of devices ensures securing a roof support unit when operating in inclined seams.
Service Life: metal works - more 40000 extracting cycles.
Closed height, mm min |
1200 |
Extended height, mm max |
2500 |
Support resistance, kN/m2 |
850 : 1050 |
Advance increment, mm |
800 |
Unit installation spacing, mm |
1500 |
Base type |
Rigid catamaran |
Number of hydraulic legs |
2 |
Leg type |
Double telescopic, hydraulic |
Piston diameter, mm |
320 |
Check valve actuation pressure, MPa |
42 |
Working pressure, MPa |
32 |
Setting load ratio |
0,76 |
Average ground pressure, MPa |
2,67 |
Advancing pattern |
Retreating |
Advance force (nominal), kN:
|
|
Service life of steel works, cycle |
30000 |
Support control type |
Electrohydraulic or manual pilot control |
Overall dimensions in transport position, mm:
|
|
Mass,t |
16,5 |