Roof support ЗМ138I
The 3М138I chock-shield supports are designed to ensure a safe working face area, mechanically strengthen and control roofs including the heavy ones according to the rock pressure manifestation, and advance longwall conveyors as coal is worked out in the fat and steep beds. The roof support is outftted with clamping devices to anchor and secure roof support units as well as adjust and route face conveyers.
Specifcation |
I standard size |
II standard size |
III standard size |
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Closed height, mm min |
1000 |
1150 |
1250 |
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Extended height, mm max |
2020 |
2450 |
2490 |
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Support resistance, kN/m2 |
900 |
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Advance increment, mm |
800 |
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Unit installation spacing, mm |
1500 |
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Base type |
Mobile catamaran |
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Number of hydraulic legs |
4 |
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Leg type |
Double telescopic, hydraulic |
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Piston diameter, mm |
220 |
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Check valve actuation pressure, MPa |
42 |
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Working pressure, MPa |
32 |
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Setting load ratio |
0,76 |
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Average ground pressure, MPa |
2,5 |
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Advancing pattern |
Advancing |
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Advance force (nominal), kN:
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|
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Service life of steel works, cycle |
30000 |
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Support control type |
Electrohydraulic or manual pilot control |
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Overall dimensions in transport position, mm:
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Mass,t |
10,5 |
11,2 |
11,8 |
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