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Post-topping operation
Release time:
2023-01-02
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Post-topping operation
Post-topping operation
(I) provisions of the first regulation
(1) Back-to-column and top-caving workers should be familiar with the management and support characteristics of the top plate of the working face, and have practical operation experience.and support workers.
(2) must be in accordance with the operation of the roof management method and the "coal mine safety regulations" provisions of the back column top.
(3) the working face for the first time, the end of the top or roof area does not fall, etc., in addition to the safetyIn addition to the implementation of the measures, it must be operated under the on-site supervision and guidance of the district (team) leader, technical personnel and mine safety supervisor,The initial caving of the working face must also be supervised and guided by the initial caving leading group.
(4) the working face situation pressure is relatively large, in case of fault, fracture zone, old lane and other recovery, to in the area (team)Operation under long supervision and guidance.
(5) the basic and special support of the working face is crooked and of unqualified quality, with empty roof, roof leakage or no pressIt is stipulated that when the special support is moved, it must be handled or repaired in time to achieve qualified quality, safety and reliability before it is allowed to be returned.Post topping.
(6) When there is a sign of roof fall when the working face is pressed, it is not allowed to return to the column and put it on the roof, and all personnel must be evacuated from the work.Face, until the pressure is stable for the area (team), monitor inspection and processing, only after the personnel into the working face.
(7）The top of the back column shall be from bottom to top and from the goaf.To the working face, the segment distance is less than 15m.Strictly implement the operation sequence of first support and then return. It is strictly forbidden to pick columns in advance and enter the goaf for operation.
(8) At least two people shall cooperate in the operation when the column is put back on the top. One person shall put the column back on the top, and the other person shall observe the top plate and support.Surrounding conditions; the observation personnel and the post returning personnel shall stand at the safe place obliquely above the solid support for operation;The inspectors are not allowed to do other work except to assist in returning to the column. The personnel returning to the column shall obey the instructions of the observation personnel.
(9) The recovered pillars shall be supported at the positions specified in the operation tutorial, and shall be fully loaded, with top beams and various materials.The materials must be neatly stacked according to the specifications of the varieties, and are not allowed to block sidewalks and safety exits or bury coal gangue.
(10) When two winches are used in the working face to return to the column at the same time, each winch shall use its own signal.Line. Two wire ropes are not allowed to run simultaneously in the same row spacing. If the lower winch is installed in the working face,The recovery method of the pillar near the winch shall be in accordance with the provisions of the operation regulations.
Recycling and topping are not allowed under any of the following conditions:
(1) When the floating coal and gangue are not cleaned up and the retreat road is not smooth.
(2) When there is no water sprinkling on the upper layer and there is no dust reduction measure in this layer.
(3) For the unqualified bracket with crooked twist, it is required to maintain or repair in advance.
(4) When the special support is not moved in advance according to the specified distance.
(5) When the distance between the topping sections is less than the specified distance.
(6) When it is difficult to return the pillar or the crushed pillar is not handled.
(7) When the return arc column is not erected with temporary pillars.
(8) There is a possibility of gangue channeling, but the gangue curtain is not properly blocked.
(9) There is a baffle under the top of the steeply inclined working face.The operation sequence of first support and then return includes the following contents:
(1) All the basic pillars are well supported.
(2) Special support shall be supported in advance, and the original special support shall be recovered later.
(3) When it is necessary to remove the nearby bracket, the temporary bracket must be laid first.
(II) preparation, inspection and handling
Tools and supplies shall be prepared before work.
Inspection and handling:
(1) Whether all kinds of supports in the working area are complete and reliable and meet the quality requirements.
(2) Whether the roof is in danger of roof caving or gangue channeling
(3) Whether the materials, floating coal, gangue, slipper, etc. in the roof area are neatly placed and cleaned up.
(4) Whether there are obstacles at each safety exit and whether the height meets the requirements of operation regulations.
(5) Check whether the special bracket is fixed firmly and reliably according to the regulations before putting the top.
(6) There is no difference between roof caving and working face.
(7) Whether the supporting materials for the back column and the blocking curtain are ready.When using the winch return post, the following inspections should also be carried out.
(1) The signalman should check whether the signal is sensitive and reliable, and whether the signal wire is damaged or squeezed.
(2) The puller shall check whether the pulleys, rope slings and pulleys meet the requirements.
(3) The winch driver shall check the winch, winch pressure, capstan, wire rope, rope hook, cable, button, etc.Whether it meets the requirements. When problems are found, they must be dealt with promptly and properly.
(III) operation
1. Method and sequence of manual column return and roof placement
(1) Remove the original special support after erecting the special support according to the specified distance and quality requirements;
(2) Hit the half-row tail post in the middle of the sectional opening;
(3) Insert the flat pin from bottom to top on the side beam of the beam-column side of the cutting top line, and tighten it;
(4) Insert flat pins from bottom to top on the side beam of the coal gang that needs to be returned to the beam, and tighten them;
(5) The post-return station returns the post obliquely above the post. When the strut is rubbed back, use a hammer to loosen the horizontal wedge;When returning to the single hydraulic strut, slowly unload the strut with the unloading handle, take out the strut and support it at the specified position;
(6) When returning the beam, put it on the complete oblique upper part of the bracket. After removing the flat pin with a hammer, hit the round pin of the beam again.Remove the beam from the continuous connection and take it out;
(7) Recyclers can continue to put all kinds of backboard materials on the top after they are stacked at the designated place.
2. Requirements for working face section back to column and roof
(1) The length of the section must comply with the provisions of the operation regulations or supplementary measures, but shall not be less than 15m;
(2) Sectional opening shall be selected at a safe place with good roof and complete support;
(3) The section opening must be provided with the upper half-row closing post;
(4) If the inclination angle of the working face is large, the baffle must be set up in the square before the top is placed to prevent injury.
(IV) Operation Precautions
(1) Back to the column top workers to do "three frequently, two high" (frequently tied, frequently pulled, frequently picked, high recovery rate,high reuse rate).
(2) After the wooden pillar that cannot be moved back can be cut with an axe, it can be broken and recovered, and the working face cannot be reused.The timber shall be transported out in time and shall not be piled on the working face or thrown into the goaf.
(3) When the mining height is greater than the length of the top beam, return the column to the beam first, that is, after recovering the pillar, then knock off the flat pin.And the round pin of the beam, so that the top beam falls and the well is dragged out.
(4) When the mining height is less than the length of the top beam, the round pin of the top beam and the back column shall be withdrawn first, and the column shall be dropped at the same time.Lower the beam and pull it out together;
(5) return to the column. if any column is pressed into the bottom plate, shovel and pick can be used to clean up the coal gangue and return it smoothly.Take out the trench from the column foot, or pull out with a winch.
(6) When the pillars and beams that are difficult to remove are in distress, temporary protective pillars or replacement pillars shall be laid before handling,Finally will replace the column back.
(7) Treatment of difficult-to-return pillars: ① When the roof pressure is high and the pillars are pressed down as soon as they are loosened, they should be pressed on.When the pillar to control the roof, and then use the method of picking the top undercover to withdraw, it is strictly prohibited to blast for withdrawal;
②When the pillar cannot shrink down against the rock block and the rock block is not easy to handle, after the roof is stable, the leg of the pillar shall be planed with a pick.Open, turn back and forth with a crowbar until the column is back out. For metal friction struts, you can use a hammer to lightly beat the column barrel to shrink.Take it out.
(8) Before bolting the column or beam, carefully check the surrounding conditions of the roof. After confirming safety, the front bolting column beam can be nearby,And quickly hang the rope sling on the hook, and it is strictly forbidden to tie the rope sling to the column.
(9) When returning to the column, the returning worker shall stand at the intact place of the bracket above the slope of the column, and use long-handled tools to unload orLoosening horizontal wedge
(10) When using the post-return winch for recovery, the following requirements shall be applied: ① When each winch is recovered,Less by one person to operate, one person to monitor, one person to tie the rope recovery, one person to send a signal; When untying the rope, it should be tight.Monitor the surrounding roof, goaf and support;
② The rope path shall be straight, without struts;
③ Do not pull a large netTo return the column, multiple sets of operation methods of less pulling and slow flap release in sequence shall be adopted, but overload operation of the winch is strictly prohibited;
④ The contact signal shall be timely and accurate. Signal contact regulations: "one stop, two open, three reverse loose rope";The transmission signal is not allowed to be replaced by shouting. After the driver hears the signal clearly, he is allowed to operate. ⑤ When the winch is started, allAll personnel must withdraw from the rope path, and the distance from the hook head is not less than 5m before the signalman can send out the start-up signal.
(11) Hand picks or other tools are not allowed to replace the unloading handle for unloading, and hammers are not allowed to smash the oil cylinder or liveColumn or three-purpose valve; When the movable column cannot be lowered, a screwdriver can be used to remove the oil injection hole screw, and then the oil is injected after the column is lowered.Tighten the hole screws.
(12) When the pillar three-use valve is damaged or the live column is pressed and cannot be unloaded, it is not allowed to pull hard and must be used.Pick the roof, undercover or lay temporary wooden pillars to support the roof, and return the hydraulic pillars.
(13) The recovered pillars must be supported at the positions specified in the operation regulations and fully carried.
Operation of (V)-shifting and setting-back winch
(1) Before moving back to the column winch, the top plate and bracket shall be selected in good condition, free from water, spacious space and conduciveThe location of installation and column return work shall be provided with solid traction column and the passage for winch movement shall be cleared.
(2) The column winch must be operated by two persons. Tie the traction rope; send it again after the personnel are scattered to a safe place.signal to drive. When moving slowly, pay close attention to the firmness of the traction column and the winch being moved.Whether it collides or squeezes roadway supports, cables or other facilities, whether the winch switch cable is tightened, and problems are found.Stop immediately and move after handling.
(3) After the winch is moved, set the switch to zero position, and then set the pressure column and the berm column. Two pressing columns should be hitBoth sides of the tail of the winch are perpendicular to the top and bottom plates; two berms are hit on both sides of the front of the winch at 75 ° to the bottom plateAngle. Each column eye head shall be hit on the chassis of the winch, and the upper head shall be supported in the column socket of the roof. When the roof is brokenOr compound top, should add column cap. The right berth column is supported on the top beam, and bracing wood must be added between the beams. Bottom plate drum loose92 When to lower the bottom beam.
(4) The winch shall be installed flat, upright and firmly. The winch can only be used after the test run main rope bolt column has sufficient strength to confirm that the winch is stable and has no problem.
(VI) Recovery of upper and lower gateway support
(1) The upper and lower gateway supports shall be recovered by at least two people. The recovery sequence is from the mining area to the coal wall,The column is followed by the beam. The maximum lag distance should be in accordance with the provisions of the operating procedures.
(2) It is strictly prohibited to use the working face and the trough plate conveyor to recover the pillar.
(3) Make up a row of pillars to be supported on the newly cut top line as required. Back to the withdrawal of various materials, should be classClean up and put it to the designated place.
(VII) Final Work
(1) Recycled columns, beams and back top materials shall be erected or stacked neatly according to regulations, and shall not block pedestrians.Road and safety exit.
(2) When there are phenomena such as pushing shed, pouring columns, and gang members, they must be handled before leaving work before closing work.
(3) Count the number of recovered columns and beams. If they are lost or damaged, they shall truthfully summarize the specific numbers, andwhen added.
(4) The recovered broken beams, waste materials or failed columns and beams shall be transported out of the working face in time and packed neatly.
(5) A comprehensive inspection shall be carried out in the topping area, and if any gangue is found, it must be carried back with the back top material.
(6) To explain the work situation and the number of columns and beams to the successor or monitor.
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