A horizontal double track lane.
Second, the roadway section size and process requirements:
1. The section of the roadway is semi-circular arch type, and the composite support of “anchor spray + 36U+ shotcrete†is adopted. The water tanks on both sides are 12m long and the water tanks are 24m long. After the construction of the anchor net, the net width of the roadway is 4650mm, and the net height is 3950mm (the contact lane does not contain 200mm thick floor). Bolt Specifications: ∮22X2500m m and other strong anchor, 600mmX600mm distance between rows, diamond mesh metal shop. The net is lapped 100mm, with 1 button per 200mm, which is arranged in a "three flowers". Three anchor cables are respectively used in the opening of the water tank passage to reinforce the roadway.
2, shelf specifications: 36U shed net width 4245mm, net height 3431mm, shed distance 600mm, column depth 250mm, the requirements must be planted to the real. The shed has a slope of 4 inches and cannot be tilted forward. The shackle cable is connected by a 404mm long connecting plate in the middle, and 800mm and a 708mm connecting plate in the center and the two legs are strengthened. The plate is required to be straight, the screw is tightened, and the wire is not removed. The back net of the shed is the same as the first one, and the back wood is one set of one, each set of 400mm back, and the meshed wire and the diamond mesh are tightened, and the whole is uniform.
3, after the shed, the overall spray 100mm to the shed mouth, so that it is integrated with the anchor net.
4. The ground of the pumping station is 200mm higher than the ground of the main road, and the tunnel is made of 200mm thick C20 concrete. The water channel in the channel is 50mm higher than the bottom surface of the main channel ditch. The water tank channel ditch specification: deep X width = 800mmX400mm, 240mm thick brick wall, powder surface calendering.
5, water tank specifications: length X width X depth = 24000mmX2180mmX1600mm before the wall, first anchor bolts, metal mesh, and then cast 200mm thick concrete base and then 240mm thick brick wall, mortar ratio 1:3, joint The surface is calendered, and it is built from the south to the north according to the slope of -4‰. (See "Middle East a ventilation system renovation water tank construction map").
6. The construction is carried out in strict accordance with the middle waist line determined by the production and testing department.
Third, the construction method
1. The roadway is constructed according to the requirements of the middle waist line given by the measurement department. The surrounding blasthole is arranged at 500mm from the contour of the roadway. The eye distance is 500mm, the eye distance of the second circle is 500mm, and the distance between the second circle and the peripheral eye is 500mm. . The peripheral eye adopts a single-stage positive charging structure, which is connected in series, and the length of the sealed gun mud is not less than 300mm. When the medicine is charged, the blastholes must be filled with the gun mud.
2. Immediately after the formation of the roadway brush, the initial spray anchor net is used. The initial spray thickness is 70mm, and the anchor net is enough for 1-3m to set up the 36U bracket shed in time.
3. Before the ditch is built, it is necessary to hang the line. Wooden struts (thickness and width of 30mm and length of 380mm) should be added every 5~7m to prevent offset. Neutral water must be used for mixing concrete, and sewage, acid and alkaline water are strictly forbidden. The water ditches and water tank walls shall not have honeycombs, dog holes or pockmarks. The surface shall be free of air bubbles and the concrete strength shall not be lower than C20.
Fourth, the support order and requirements
The order of permanent support of the roadway: initial spraying, anchoring, hanging nets, sheds, re-spraying into lanes.
1. Temporary support
The anchor net process uses the initial spray C20ç ¼70mm as a temporary support. The shed uses two semi-circles for temporary support.
2, roadway permanent support
1) Use the initial spray anchor net + erect 36U shrinkable arch bracket support. When anchoring the net, the two sets of anchor bolts are shot at -60°, the other anchors are perpendicular to the rock face or the roadway outline, and each anchor is anchored with an anchoring agent end. Installed with a bolt mounting machine, the fast anchoring agent gel time is 41-90s. After 3~5min, the tray is tightened and close to the rock face. The exposed wire length of the bolt is 30~50mm, and the anchoring force is ≥85kN after 15min installation.
2) When installing the metal mesh, it must be close to the roadway surface, the mesh piece is straight, then press the bolt tray to tighten the nut. The exposed length of the bolt is 30~50mm. The metal mesh installed in the shed must be close to the 36U shed, the mesh is straight, and then the mesh is twisted with the shed.
3) When the shed is shed, the shed must not lean forward, twist, and step.
4) The bottom of the ditch is made of C20ç ¼, the mixing ratio is cement: sand: water = 1:2.2: 0.6, (weight ratio), the cement is made of ordinary cement of P.C32.5, and the sand is made of medium grain river sand.
V. Safety technical measures
1. Each team must open a team to work in a shift, responsible for the safety of the shift and the quality of the project.
2. Before the construction of each class, the construction site must be carefully inspected and all unsafe factors must be disposed of before the operation can be carried out.
3. During the construction, there must be a team leader to be in charge of the command at the scene, pay attention to the observation of the roof and surrounding support, and find problems in a timely manner.
4. Before the construction of each class, the team leader personally arranges the full-time personnel to take charge of the work, and hangs the blasting warning sign. Before and after each blast, the team leader must personally count the number of people, check the accuracy of the order to issue the detonation order, put the gunner to the detonation order to blow the whistle three times, at least wait 3-5s before hiding under the bunker for detonation. The location of the alert is: to the 1# turn cage, the auxiliary shaft bottom, the double track lane to the east end of a track and alleys), the warning distance is a safe place 150m away from the construction point.
5. Strictly implement the system of “no driving, pedestrians do not drive†and “driving without workâ€. When a team of vehicles really needs to pass through the construction area, the three teams and the team's full-time coordinators must coordinate with each other reliably. After both parties agree and all the personnel hide in the safe place behind the locomotive room, it is feasible to prevent the team from reversing or reversing the vehicle. Accidents occurred through and down the road>.
6. Before the construction, the cable before and after the blasting point must be removed and the 4 inch diameter iron pipe should be set, and then the 50mm thick wooden board and the old belt should be protected.
7. Since the section is located in the track lane, the construction personnel must pay attention to the personal line, the tools and the conductor are strictly prohibited from touching the open line; the 5m open line before the operation point must be kept off by the first team or the black rubber tube can be used for protection.
8. Personnel must go through the track lane first. Look at it, walk the pedestrian road, and take the tool in the direction of the roadway to achieve “one stop, two look, three passâ€. When a team of vehicles passes, they must whistle and slow down.
9. The normal operation of the roadway at each of the 100m out of the three teams must strictly implement the mouth alert system. When transporting a team of vehicles, you must inform the construction team of the three teams in advance, and the three team members will be obstructed in advance to obstruct the vehicle traffic factor. After entering the safe escape location, both parties can allow the vehicle to pass through the construction area and whistle slowly to prevent crushing accidents>.
10. Strengthen roof management. For the row spacing, the anchor must be first marked and the temporary support should be done as required by this measure. Strictly implement the knock-on top system in the work. Every 15 minutes and each process, the former team leader must arrange experienced old workers to knock on the top. The site must be equipped with long-handle tools, sledgehammers and other tools. When looking for the top, the top person must stand in a safe place. Ensure that the retreat route is unblocked and that one person can be illuminated and operated by one person.
11. Before the eyes are opened, the wind pipe and the air drill connector should be firmly fixed. During the process of eye-catching, attention should be paid to whether it is loose or not. It is found that the looseness is dealt with in time. When two or more wind drills are drilled, avoid overlapping the upper and lower eyes, so as to avoid breaking the person.
12. Before you open your eyes, you will find the hard rock of the rock with your hand, draw the outline of the roadway, and arrange the position of the blasthole. It is absolutely not allowed to catch the eye of the eye.
13. Blasting shall not exceed 6 eyes at a time. The amount of charge per eye shall not exceed 1 knot, the depth of the eye shall not be less than 0.6m, and it shall be filled with gunnery.
14. Gas concentration ≥0.5%, blasting is strictly prohibited. The blasting busbar must be pulled more than 100m and blasted under the shelter.
15. Every time a cannon is fired, after the gun smoke is cleaned, the team leader and the blaster enter the head at the same time and inspect the top plate support from the outside to the inside. Use the long handle tool to put down the dangerous rock, and blast from the outside to the inside. The live anchor is qualified for rectification. At the same time, the blaster must entangle the busbar and check whether there is residual explosion or refusal. The blasting and refusal must be handled according to the regulations.
16. When the anchor is filled, when the anchor is more than 900mm from the head, it should be added at least 3? 160mm caps before the front.
17. When installing, the empty car must be fixed firmly. When loading the vehicle, pay attention to the cables and pipelines around the work place to prevent damage. Do not install too full, no more than the car and the car on the edge and live. When encountering a large piece of meteorite, it must be broken. When a large hammer is used to break a large block, no one is allowed to face and around, in case the hammer or gravel splash is hurting.
18. Before spraying, fix the Fengshui pipeline and the feeding pipe firmly, and wrap the cable pipeline with colored strips to prevent splashing of mortar. Team leader, electrician> Always check the connection of the flue pipe of the feng shui pipeline to prevent the pipeline from being injured.
19. The ratio of shotcreting materials is: ash: sand = 1:2.5, the blending amount of quick-setting admixture is 3-4% of cement, and the water-cement ratio is 0.45.
20. When spraying, the nozzle should be vertically sprayed, and the nozzle should not be larger than 1.5m from the spray surface. The nozzle has a circular or elliptical trajectory to make a spiral slow movement. Strictly control the water-cement ratio and the amount of wind pressure and quick-setting agent to minimize rebound. The thickness of the spray layer should not be less than 50mm, and the appearance is beautiful, the spray layer is dense, and there is no barefoot or skirt.
21. When spraying, the nozzle is strictly forbidden to people. The hose is tied and tensioned with double-strand φ3mm iron wire. When the pipe is blocked, the straight feed pipe should be placed at the same time, and the tapping method should be used to dredge. The wind pressure is not more than 0.4Mpa, and the nozzle is pressed by both hands. The front of the nozzle is strictly forbidden to stand, the sprayer When a fault occurs, it must be powered off. Please contact the relevant personnel before sending power.
22, the old tape is laid in the 10m range before and after the shotcreting construction point, in order to collect the rebound material, the rebound rate should not exceed 20%.
Page 2 / (2 pages in total) 23. Before spraying, clean the meteorites and debris at the injection site, and connect the feeding pipe and the air pipe. The conveying pipe must not have sharp bends, the joints are tight, and no air leakage is allowed.
24, the electrician before spraying> must check in advance whether the shotcrete machine is in good condition, the power transmission is running at no load, tighten the friction plate, and there should be no air leakage.
25, the jet personnel should wear a full and effective labor protection to prevent mortar from splashing people.
26, the spray sequence should first the wall rear arch, from the bottom of the wall from the bottom up, the spray head and the spray surface should be as vertical as possible, the vertical distance between the spray head and the sprayed surface is 0.8m-1.0m.
27. During the spraying process, according to the change of discharge, adjust the water supply amount in time to ensure the water-cement ratio is accurate, so that the sprayed wet concrete has no dry spots, no runny, strong adhesion, and less rebound material. The thickness of a shotcrete shall be 50-60mm, and it shall be re-injected in time. The interval between re-spraying shall not exceed 2 h. Otherwise, the sprayed surface shall be re-rinsed with high-pressure water.
28, after the end of the injection work, once the injection is completed, the rebound should be cleaned up immediately, and the mix should be used.
29, when starting the machine must first give water, then open the wind, then turn on the machine, and finally load, stop the material when stopping, then turn off the water, stop the wind, and finally stop, after the start of the jetting work, it is strictly forbidden to point the spray gun to the person to prevent accident.
30. The spraying operation is carried out by two workers. The jet hand holds the nozzle for operation, and the deputy observes the injection situation and performs safety monitoring.
31. The sprayer grasps the spray angle, and the nozzle tries to make the vertical rock face. When the wall is sprayed, the spray angle is below 10°-15°, and the minimum elevation angle is 65° when the dome is sprayed.
32. Before hitting the anchor rod, first observe the surrounding rock, deal with the unsafe factors, and set the eye position. When drilling the rig , you should support the rig , first raise the air leg, and make the drill bit against the rock face to ensure the correct position of the opening.
33. When drilling, the operator should stand outside the length of the long arm and stand on the legs to maintain balance. First open the water, then open the wind. When starting the drilling, use a low speed and adjust to the appropriate speed as the drilling depth increases until the initial anchor hole is drilled into place.
34. When installing and anchoring the anchor rod, first send the resin medicine roll to the bottom of the hole with the anchor cable, then stir it with the bolt machine, stir it while propelling, use the slow speed in the first half, fast in the second half, and stir the time. About 40s. After stopping the stirring, the driving force of the anchor machine should be kept for about 60 seconds to reduce the anchor machine.
35. The pre-tightening torque of the anchor is not less than 200N.m. If the anchor is found to be unqualified, the qualified anchor must be repaired.
38. When hitting the anchor rod and the shed, the construction scaffolding must be welded firmly. The platform is built with 80mm thick pine wood, the nails are nailed firmly, and the 8# wire and the scaffold are screwed firmly and smoothly. It is removed before the traffic and at the end of the operation. .
39. The operator must wear a good quality belt in strict accordance with the operating procedures. The belt must be securely fastened to the person and the top. The team leader must check the quality of the belt and the fixed use before the construction of each class, and put it into place for re-production.
40. The column nest is dug and the leg is corrected. After the initial fixation with 8# wire, it can be placed on the upper beam. At least 5 or more elite personnel should be placed on the upper beam. The special person should monitor the safety and prohibit the person from standing. After the correction, the cable and the connecting board should be put in time, and the screws should be tightened with a torque wrench or a bolting machine.
41. The floating point and floating coal at the construction site must be cleaned in time. There should be no lumps and debris on the road surface, the road center and the sides. Otherwise, it is strictly forbidden to drive.
42. Manual unloading, mixing and transportation must be carried out in a sufficiently spacious and safe place. It should be well-received and arranged for sufficient and capable personnel to pay attention to the pedestrians and construction workers, personal and long materials (36U beams, legs). Etc.), tools and conductor materials do not touch the open line.
43. Two spray devices covering the full section must be installed on the downwind side of the construction site to ensure normal operation during operation.
44. All construction personnel must wear complete and effective labor protection articles according to the regulations, tighten the cuffs and trousers, and cooperate with each other to make mutual security and mutual security. The normal operation time of the miner's lamp is not less than 11h.
45. Strictly implement refined material management, and make fixed positioning, listing management, and prohibit littering. After the end of each shift, the environmental sanitation of the upper and lower 10m of the working section must be cleaned up and the materials should be neatly arranged.
46. ​​The fan is placed at a distance of not less than 10m from the side of the inlet, and the fan is not less than 300mm from the ground. A portable gas detector is suspended from the side of the duct without any distance of 5m from the front, 300mm from the top, and 200mm from the gang. Strict implementation of the blasting and listing system must be assigned to a person in charge at the prescribed location, and effectively assume responsibility for prohibiting personnel and vehicles from entering the warning area.
47. The distance of the air duct should not exceed 5m in front of it, and it should be hung straight and the ring must be hung. The air cylinder is 300mm from the top and 200mm from the gang.
48, note the use of the bucket machine:
1) Sprinkle water or rinse the top and help on the rock before loading the rock;
2) When the driver of the forklift is working, he must pay attention to the safety of the front, back, left and right personnel;
3) The tail wheel of the bucket machine must be fixed firmly;
4) Before the rock loader is installed, the fuselage must be fixed firmly. It is strictly forbidden to carry out other work or pedestrians within the scope of the bucket operation. When using a bucket machine on a slope, there must be safety measures to prevent the fuselage from sliding down;
5) Before the Yanyan, the driver should conduct a comprehensive inspection of the mechanical and electrical systems, and find that the faults are eliminated in time or the mechanical and electrical maintenance workers are being processed to prohibit the operation of the machine;
6) When the bucket is used, it is necessary to have a safety device for the sports car. When moving the bucket machine, it must be pulled by the winch. When moving up, there should be no one underneath; when moving down, there should be no one in front of it;
7) During the armoring process, if the bucket is blocked, the bucket should not be forcibly pulled, and the bucket should be returned to the bucket;
8) When the driver is operating, do not hold the two handles at the same time to prevent the bucket from flying;
9) When the angle between the rope exiting direction of the bucket and the center of the bucket is too large, the driver should operate on the opposite side of the rope to prevent the bucket from pulling out the chute to the driver;
10) When the bucket is being installed in the curved roadway, the machine path must be cleaned up, and there must be a special person command and signal contact;
11) It is strictly forbidden to hold and collide with the wire rope or traction chain in operation to prevent injury;
12) When the machine fails during use, it must stop, cut off the power supply, and process it;
13) After the work of the bucket machine is completed, the handlebar should be placed in the release position, the power supply should be cut off, and the handlebar should be removed;
14) Mechanical movement should be stopped when charging. Before the shot, the bucket machine should be pulled to the chute, cut off the power supply, and the cable and button of the bucket machine should be blocked. The bucket machine should be retired to a safe place 10m away from the head;
15) When the bucket machine is working, a chute should be set on the chute to prevent the wire rope from injuring people.
49, slipper driver notes:
1), the slippery laying should be straight, after the succession, the following aspects should be checked on the slipper:
1 Whether the bolts of each part are complete and fastened;
2 Whether the hydraulic coupling is short of oil and the protective cover is complete;
3 Whether the operation button is flexible and reliable;
4 Whether the signal button is flexible and reliable;
5 Whether the size chain is tight or not;
6 Is the gearbox short of oil?
If any of the above items are inspected, they must be disposed of in a timely manner.
2), the switch handle is hit to the power transmission position, and the slider is checked for reverse rotation.
3) After the driver receives the signal from the opener, he must first click on the slider. If there is no abnormal situation, press the start button again to make the slider run.
4), under normal circumstances to receive the parking signal, a number of sliders to go from head to head, stop running one by one. At the time of startup, the principle of starting from the outside to the inside is carried out. In case of emergency, it must be stopped immediately.
5) In the operation, the driver's energy must be concentrated, and the chain is broken and immediately stopped for processing.
6) In the operation, if abnormal sound or abnormal condition is found, stop the slipper to find out the cause.
7) When the shift is stopped, the switch handle should be turned to zero position, and the suspicious situation that occurs during the operation of the slipper should be clarified.
8) After stopping the slipper, the driver must clean the head of the slider and the floating rock on both sides.
50. This measure will send a copy of the team to the relevant personnel.
51. This measure must be implemented in detail to all construction personnel and perform the signing procedures.
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