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1. Prepare the tools and utensils needed for the column.
2. Security inspection and processing:
(1) Whether the various supports in the work area are complete and reliable, and meet the quality requirements.
(2) Whether the top plate has a topping phenomenon or a smashing phenomenon.
(3) Whether the materials in the topping area, floating coal , vermiculite, and moving rollers are placed neatly and cleaned up.
(4) Whether there are obstacles in various safety exits and whether the height meets the requirements of the operating procedures.
(5) Whether the various special brackets are securely and reliably moved according to regulations.
(6) Whether the roof is falling and the working surface is abnormal.
(7) Whether the support materials for the top of the column are placed, whether the curtains are closed, etc.
(8) When using a winch to return to the column, the following checks should also be made:
1 The signal worker should check whether the signal is sensitive and reliable, and whether the signal cable is damaged or squeezed.
2 Check the pulley mast, the rope sleeve and the pulley for compliance.
3 The winch driver should check whether the winch, mast, wire rope, rope hook, cable, button, etc. meet the requirements.
Before the start of construction, the above items should be inspected in detail, and problems must be dealt with in a timely manner before they can be returned to the column.
The sequence of operation of the artificial back column
1 According to the specified distance and quality requirements, after the special bracket is installed, the original special bracket is removed.
2 Place a half-row of the tail column in the middle of the segmented opening.
3 Hang the curtains on the side of the goaf in the new top line.
4 On the spliced ​​top beam to be returned, insert the horizontal wedge from bottom to top and tighten with a hammer.
5 One person hangs the hinged top beam with a soft rope hook, and cooperates with the back column to pull out the top beam while releasing the pressure.
6 The column worker stands on the upper side of the column and goes back to the column. When returning to the friction strut, use the hammer to hit the horizontal wedge on the loose column; when returning to the single hydraulic prop, use the unloading handle to slowly unload the strut, and after removing the strut, support it at the specified position.
7 When returning the beam, stand on the upper side of the bracket and use the hammer to disengage the horizontal wedge, then disengage the pin of the beam and take the beam out of the connection and take it out.
8 Recover all kinds of backboard materials, and put the pillars, hinges and backboards that have been dropped back to the designated location before continuing to top.
The operation sequence of the triple winch back to the top of the column
1 According to the specified distance and quality requirements, after the special brackets are installed, the original special brackets are dismantled and shipped to the designated place for tidying.
2 Hang the curtains on the side of the goaf in the new top line.
3 The signal worker sends out the loose rope signal, and the returning column drags the main rope from top to bottom, and when it is placed in position, it sends a stop signal.
4 Tie the post to be returned with a small rope and connect it to the main rope hook.
5 Back column workers stand on the upper side of the column to return to the column; when returning to the friction column, use the hammer to loosen the horizontal wedge; when returning to the single hydraulic prop; use the unloading handle to slowly unload the column; The other rope is bolted to the beam and the hammer and the crowbar make the pillar and the beam misaligned. The rope sleeve is retracted to a safe place, a tight rope signal is sent, the pillar and the beam are dragged to the appropriate position, a parking signal is issued, and the tight rope is stopped. Remove the struts and beams and place them in the designated position.
When returning the beam, use a hammer to hit the pin of the beam to make the beam out of the connection. When the beam is pulled outward, it is the same as the operation of the column.
7 recovering the iron hooks dorsal various roofing material, and into the specified location, can proceed prop caving work.
4. Safety precautions when using the back column winch to return to the column
1 Each winch is recycled, at least three people operate; one person monitors, one person tying rope to recover; one person sends a signal. When unwinding, the surrounding roof, goaf and bracket should be closely monitored.
2 The ropeway should be straight and cannot be erected.
3 It is not allowed to pull the net back to the column. Multi-rope sleeves should be used. In order, less pulling, slow pulling and fine-disposing operation methods are strictly prohibited.
4 The contact signal should be timely and accurate, and the division of labor should be clear. Signal contact regulations: one stop; two sounds; three reverses the rope. The transmission signal is not allowed to be replaced by a shouting voice. After the driver hears the signal, the operator operates.
5 When the winch is to be started, all personnel must evacuate the ropeway from the hook head no less than 5 meters before the signal worker can issue a driving signal.
Xi'an Luguang Xincheng Trading Co., Ltd , https://www.lgxc-autosales.com