First, the description

Part of the roadway within 7307 Cut since the roof broken irregularities affect mining effectively grounded top coal stent, thus the need for the cut in the top plate is not flattened section construction false roof; to strengthen Yun-supporting quality, Yun-surface side from the Cut The anchor cable is applied to the 50.0m position of the mouth to the nose. In order to ensure construction safety and quality, this construction measure is specially prepared.

Second, the construction sequence, method and construction requirements

(1) Construction of false roof

1. Construction scope: 7307 cut-eye widening side 12-23 rows and widened side 19-23 rows corresponding to the guiding side.

2. Construction sequence and method

(1) Before the construction, the ladder, raft, semi-round wood (1.2m) and road wood (1.2m) used in the fake roof shall be transported to the construction site.

(2) Before construction, first pull a rope at 3.3-3.4m from the bottom plate of the construction section (smooth and flat with the top and bottom of the construction section), and arrange the steel strip according to this height.

(3) During construction, the steel belts shall be arranged at intervals of 1.0 m in the cross-span, each steel strip shall be fixed on the top plate with 6 top anchors, and then a 1.2 m long security board shall be laid on the constructed steel strip, the security board when using a security plate covered with metal mesh, then 0.8m spacing paved semicircular wood, with woods last played "well" type stack top pick, do not fill the top of the woods, finally wedge plus real plus prison. Then cycle as above until the end of construction. (See the section of the false top support).

(4) The steel belt adopts 4.4m long trapezoidal steel belt, and each steel belt is arranged with 6 rods with a length of 2.45m and φ0.022m T-type nut type one-way left-handed non-longitudinal threaded steel resin anchors. Strictly follow the construction of two sets of wire ropes to ensure that the steel strip under the raft is 3.3-3.4m from the bottom plate.

(5) The exposed length of the anchor is 10-40mm. The bolt arrangement is integrated with the steel strip, and the bolt installation instructions and precautions are strictly implemented.

(6) The materials used for the road wood and security board should be good, and the road wood should not use decay wood.

(7) The rafts should be lapped together, and the verticals should be vertically aligned. After the rafts are topped, they should be solidified with wooden wedges.

(2) Construction of anchor cable

1. Construction scope: 7307 Yunshun solid coal side 1-450 rows.

2, construction process

(1) Before construction, the team leader or experienced old workers should carefully check the roof and gang support of the construction site and find out the problems in a timely manner.

(2) During construction, the first 7.5m long anchor cable is placed at the position of 1.0±0.05m from the top plate and 20±5° from the contour of the gang, and then 2.0±0.05m from the top plate. The second 7.5m long anchor cable is horizontally arranged, and the construction anchor cable uses 0.4×0.4m square tray and 0.5×0.5m leather joint support.

(3) 2 anchors are arranged every 1 row (1.6m pitch)

(4) The exposed length of the anchor cable is 150-250mm, and the installation instructions and precautions of the anchor cable are strictly implemented.

Third, construction safety hazards

1. When the steel belt is not fixed firmly and the fake roof is broken, the wood falls and hurts people.

2, the pneumatic tool pipeline connection is not very hurtful.

3. Hidden safety hazards.

Fourth, construction safety technical measures

(1) Relevant regulations on roof management

1. During the construction, the roof management should be strengthened, and the system of knocking and helping the top should be strictly implemented. Before each shift and during construction, the team leader must be personally responsible for standing on the roof, and use the long brazing or long handle tools to find the outside. The live smashing and dangerous stone on the top of the gang will be confirmed.

2, knocking on the top of the question must be carried out by two people, one person to operate, one person to observe the light to grasp the safety. Before each construction and during construction, the roof support of the construction site must be inspected in the order from the outside to the inside. If necessary, the point column can be supported to control the roof.

3. When constructing the false top, a firm workbench must be set up. The ladders, rafters and workbench used in the construction should be placed firmly. If there is someone working on it, there will be special person care. When climbing the work, the construction workers should wear seat belts. Prevent falling from high altitude.

4, the construction of the steel strip, the steel strip should be applied in an iron wire fixed to the top plate, and both ends of the bolt head construction, to be end finished anchor construction, the construction of intermediate anchors, in turn finished steel construction.

5. When using the road wood to be connected, there must be a unified command by a special person, and a special person should carry out safety supervision. Before the completion of the construction, no one should stay and pass under the top. The construction must be equipped with sufficient manpower. The construction personnel must obey the command, coordinate with each other, and do a good job of independent security and mutual security.

6. The construction site should send a special person to observe the pedestrians, reminding the people and construction personnel to pay attention to safety.

(3) Eye-catching regulations

1. The use of anchor rigs must strictly implement the relevant provisions of the “Technical Practices for Coal Mine Workers”.

2. Before the eyes are inspected, the air duct, water pipe and drilling rig should be inspected. The air duct and water pipe should be connected to the drilling rig, and the joint should be firmly connected. If there is air leakage or water leakage, it should be treated in time.

3. When opening the eye, first open the water and then open the wind. After the drill is slowly drilled into the 20~30mm, the whole wind pressure is drilled. The wind and water should be even and appropriate. It is strictly prohibited to bend the drill.

4. When you finish an eye or change the braze, you must first turn off the wind and then turn off the water.

5. When the eye position is too high, a workbench must be set up. The console is equipped with a specially made tweezers or ladders with 5 points thick slabs. Both ends of the slab must be tightly connected with tweezers or ladders with wire or hemp rope, over 2m height. The constructor must wear a seat belt and one end of the seat belt must be fixed to a special anchor.

6. Allow one or two people to operate a drilling rig when drilling. It is not allowed to open the eyes in the absence of operation.

7. It is strictly forbidden to dry your eyes.

4. The sectional view of the false top support and the construction position of the anchor cable.

V. Other unfinished matters Strictly implement the relevant provisions in the “Safety Regulations for Coal Mines”, “Technical Operation Procedures for Coal Mine Workers” and “Procedures for 7307 Operation, Cutting and Guidance”.

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