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Special Support of Coal Mining Face-End Support of Coal Mining Face
Release time:
2022-12-30
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Special Support of Coal Mining Face-End Support of Coal Mining Face
(I) end support mode
(1) Step-up shed lifting composed of single pillar and long beam. This method has strong adaptability and is conducive to the stability of the head hydraulic support, but it is troublesome and time-consuming to erect.
(2) Self-moving end bracket. This method moves fast, but has poor adaptability to the condition of the roadway.
(3) with working face hydraulic support support support end, this way is suitable for coal seam dip angle smaller fully mechanized mining face, usually in the head (tail) to lag behind the middle of the working face a cutting depth.
(II) the outer end of the end of the coal mining face to strengthen the support. The upper and lower ends are supported by cross top beams with single hydraulic prop, and the corresponding cross top beams are adopted to support the top plate of the end according to the size of the end space.
When the gap with the row head bracket is more than 0.5m, a pair of heading shed lifting beams and three columns shall be used to support the roof, and the shed lifting shall be 3.5m long No. 12 I-steel. The upper and lower ends shall be supported with cut-top dense pillars, and a row shall be supported at the tail of the shield beam of the head rack, so as to facilitate the maintenance of the tail of the transfer machine and the safety of coal discharge at both ends. No-load cross top beam shall be allowed at the end, and a pair of shed lifting support shall be used for cross head and tail sliding. The forward movement and support of the end support shall be carried out after the end support is moved and the initial support force is reached.
(III) end support operation method and matters needing attention
1. Operation method of four pairs of eight long steel beams at the end
(1) Clean the floating coal and floating gangue at the gap column position, and prepare the pillar and back material.
(2) On the other steel beam in pairs on the side of the scraper conveyor near the coal wall, hang up the moving beam device to support the moved steel beam.
(3) One person slowly unloads the descending column for about 0.1m, while one person holds the pillar and the other holds the outer end of the steel beam to move the steel beam forward quickly.
(4) Place the steel beam on the prepared pillar. When the steel beam is moved to position, carry the top back and the pillar is filled and tightened. The operation sequence of other steel beams is the same as above.
2. Precautions for four pairs of eight large steel beams at the end
(1) Under normal circumstances, one beam and three columns must be maintained. When moving, one beam and two columns can be used. After moving, it should be filled in time.
(2) There must be more than 3 people working together at the same time.
(3) The steel beams shall move forward alternately and shall not go hand in hand.
(4) The column claw must hold the long steel beam teeth when supporting.
(5) After the pillar is lifted, the pillar head must be tied with lead wire.
(6) Deformed steel beams must be replaced in time.
(7) It is forbidden to operate with empty roof without support in the gap.
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