Precautions And Sequence Of Moving Operation Of Steel Arch Support
Steel Arch Support transfer operation and matters needing attention
1. Give a warning before moving the Steel Arch Support, and no one should stay or pass around the moved Support Arch.
2. Correctly choose the appropriate way of pulling the Support Arch. When the roof is broken, it should be supported in advance, and the roof-wiping frame should be used as much as possible.
Normal Mine Roof Support transfer operation sequence:
(1) Retract the telescopic beam, the guard board and the side guard board.
(2) Extend the rear conveyor to pull the lifting jack (only the top coal bracket performs this operation).
(3) Operate the front probe beam to lower the front probe beam and avoid the obstacles in front.
(4) Drop the column so that the main top beam is slightly separated
from the top Mine Roof Support, (the lifting jack can be operated at the
same time).
(5) When the Mine Roof Support is movable, stop dropping the column immediately, so that the Steel
Arch Support moves to the specified step distance %3. When pulling the
top coal caving support, attention should also be paid to the tail beam
and the insert plate to prevent large pieces of gangue from falling into
the rear conveyor.
(6) Operate the rack adjustment system to adjust
the rack, so that the bracket pushing jack is vertical to the scraper
conveyor, the Steel Arch Support is
not crooked or inclined, the center distance of the bracket meets the
regulations, and the brackets on the whole working face are arranged in a
straight line.
(7) Lift the column (retract the lifting frame jack
before lifting the column) and adjust the balance jack at the same time,
so that the main top beam and the top plate are in close contact for
about 3-5s to ensure that the initial support force reaches the
specified value.
(8) The front beam is raised to extend the
telescopic beam and the guard plate, so that the guard plate can
withstand the coal wall, and the side guard plate is extended to make it
close to the adjacent lower bracket. Operate the tail beam insert plate
to pull and push the coal gangue.
