Maintenance safety technical measures for the new auxiliary shaft Dongdong Alley

I. Overview Dongda Lane is located in the east wing of the auxiliary shaft with a total length of 90m. The original support is a semi-circular arched roadway and arched support for the stone. Due to the high pressure of the mine and the long downtime, the length of the two roadway repairs has been about 37m. In order to mine ventilation, transportation, pedestrian safety, it is necessary to repair it. In order to ensure safety during maintenance, this measure is specially formulated. (with floor plan).

Second, the first section of the roadway status is 48m from the bottom of the auxiliary shaft to the east. The outer drum of the raw stone wall is about 800-1000mm in width and about 10m in length. The second section is 63m east from the bottom of the auxiliary shaft. The raw stone wall is severely deformed and the length is about 27m. Roadway horizon which: at least two roadways are two layers of roof coal layer 1, the lithology is gray, dark gray sandy shale and sandstone.

Third, the length of the first section of maintenance engineering is about 10m, and the length of the second section is about 27m.

Fourth, the first method of maintenance: the outer drum wall masonry stone is removed, re-laying, after the wall, the roadway section 8.8m2. In the second stage, the deformed broken stone masonry was removed and changed into a U25 semi-circular arch-shaped contractile support with a support section of 8.8 m2.

Fifth, the maintenance construction sequence from west to east, first the first section of maintenance, and then from the west to the east for the second section of maintenance.

Sixth, engineering quality standards and requirements (1), expand the wall: (1) wall base depth; 400 ± 50mm; (2) wall thickness: 400 ± 50mm; (3) masonry specifications: length × width × height =400×200×200mm; (4) Filling behind the wall: filled with mortar after the wall, full and strict; (5) Wall: no heavy seam, quilting, dry seam; (6) sand-to-ash ratio: 3:1; (7) The pressure between the stones is not less than 1/3 of the thickness of the stone; (8) The flatness of the wall: ≤ 50mm in the range of 1.0m2. (B), U-shaped steel bracket support quality standard requirements: (1) net width: 3200mm, center to any gang: 1600mm, error: 0 ~ +80mm. (2) Net height: 3100mm, error 0~+80mm. (3) Shed distance: 500mm <medium to medium>, error 0~+80mm. (4) Lap length: 500±50mm. (5) Ear gap: ≤ 10mm. (6) Bracket beam skew: ±100mm. (7) Cable spacing: 350±30mm. (8) Column depth: 200 ± 20 mm. (9) Forward tilting and reclining: perpendicular to the top and bottom plates, the error is ±0.5° (8mm/m). (10) Two-way iron tie rods, two struts (two waists, one center of the top plate). Iron rods and struts are complete, firm and effective, and made into a straight line. (11) Brake back top: Eight gangs and six tops each shed with 14 back panels. (12) The grid with a diameter of 8mm for the top back brake is a 50×50mm steel mesh. The mesh and the mesh are overlapped by 50-100mm, and each interval is 150-200mm and tied with 14# wire. (III) Quality standards for masonry ditch: 1. Net width: 400mm (±30mm). 2. Net depth: 250mm (±30mm). 3. Cover: 800mm long, 600mm wide and 100mm thick. 4, sand cement ratio: 3:1 (four), paving road safety matters 1. The paving work must be carried out in parallel with the demolition shed. 2. Before the first section of the wall is demolished, the original paved road is removed and replaced in advance. 3. The old rails and sleepers that have been removed are temporarily put aside for recycling. 4. Before paving the road, it must be laid according to the given center and waistline. 5. The sleepers for paving the road should be evenly spaced and buried according to the standard. 6. Paving quality standards: (1), rules: 600mm, the error is not more than +10mm, not less than -5mm. (2), the spacing of the sleepers: 800mm, the error is ± 50mm, the depth of the buried floor is 2/3 of the thickness of the sleepers, and should not be suspended. (3), joint gap: no more than 50mm (4), joint height difference: no more than 5mm, internal error: no more than 5mm (5), the joint parts are complete and there is a sleeper, the road splint model and the railway model match. (6), track model: 22kg/m (7), height difference between two rail faces: no more than 20mm (8), rail laying according to the center: error ± 30mm (9), height of the road surface from the waistline: 1200mm, error ±20mm (10), 4 spikes on each sleeper, two spikes at each joint, the spikes are staggered and symmetrical. (11), the spacing of the sleepers at the water, can be properly encrypted. (12), changing slope, slow transition. (13), the roadway variable section, the sleeper is fan-shaped laying, the outer arc is 50mm higher than the inner arc.

VII. Safety technical measures (1) Roof management 1. Before maintenance work, it is necessary to check the support situation within 20m before and after the maintenance site, and find that unsafe factors are dealt with in a timely manner. Hidden dangers are not excluded from organizing construction, and the work place is cleaned before construction. All kinds of sundries. 2. Before each construction, the team leader must assign a special person to check the maintenance point. Persist in knocking on the top of the question and the special person to observe the mountain system. Every step of the gang, digging the column and the shed must be assigned by the senior security officer on duty to work on site, and the staff standing in a safe place when looking for the top. The handle tool (2m steel brazing) is set up from the upper diagonal to the top of the eye. It is strictly forbidden to stand under the top or find the top. Guanshan personnel must concentrate on work that is not related to Guanshan. Once the danger is discovered, immediately issue a warning and evacuate personnel. 3. Maintenance and construction must adhere to the principle of construction from west to east (by frame). It is strictly forbidden to dismantle large unloading; to demolish wall sections, the length of each demolition is not more than 1200mm, and the maximum control top distance of the demolition shed is not more than 700mm. . 4. Before the wall is demolished, the top pillar must be advanced 3m or the rafter should be used to reinforce the roof. The diameter of the top pillar is 160-180mm. The length is based on the solid bottom, hard hit hard, vertical top and bottom plate. The specifications of the raft are subject to the actual situation on the spot, but they must be firmly secured by the top. 5. Safety measures for the shed: (1) Before the construction, the original shed card must be oiled for disassembly. (2), remove the card, use a special casing. (3) When dismantling the card, the personnel shall not face the card in case of sudden pressure to injure the person. (4) Before the bracket is removed, the shed beam is temporarily fixed. After the shed card is loosened, the beam is manually raised and the beam is removed. (5) Before disassembling the beam, the top must be temporarily protected to prevent the person from being injured, and the front cover should be no less than the previous shed. (6) After the shed is removed, find the live smashed gravel in time. (7) The scrapped materials shall be taken out of the construction site in time, no less than 20m by the help of the code, and shall not affect the retreat and driving. 6, shelf safety measures (1) before the shed, first set the center waist line, the position of the shed beam and the height of the shed beam to prevent rework. (2) In front of the shed, firstly beam the beam, temporarily fix the shed beam on the front beam and carry out temporary roof protection. (3) After the two shed legs are planted into the column, temporary fixing measures are taken to prevent the shed legs from being dumped and wounded. (4) After docking the shed beams and legs, use the card to fix them together and perform the brake back. (5) When the roof is high and the shed beam is difficult, the temporary workbench can be lapped. The temporary workbench is made of iron pipe with a diameter of 100mm, the cross arm is fixed on two lanes, and the upper bunk is made of a large plate with a thickness of not less than 50mm. (6) The workbench to be lapped is fixed by the steel wire rope with a diameter of 12.5mm in the two lanes. The wire rope is matched with the matching card, and the joint is not less than two points. (7) The workbench to be connected must be firm and reliable. (8), the workbench used can also be replaced by a mine car, but the two ends of the mine car must be covered with the "ten" word, and the large car is laid above the mine car. (9), the large board laid on the top of the workbench, fixed with 8# wire, in case the personnel stand at one end, lift up and empty. 7. After the wall or shed is removed, the wedge probe is penetrated in time to prevent the loose meteorite from falling off, and the front probe distance is not less than 800mm. 8. Before building the wall and shed, first determine the center and waistline, and strictly follow the middle waist line. 9. The sapphire pile is reserved at the construction site for erecting the upper beam of the arched bracket. When the upper beam is moved forward, the front beam is moved forward, the shed beam is placed on the front probe beam, and the top temporary brake back is protected in time. 10. When you are on the beam, unrelated personnel must be evacuated to a safe place. 11. After erecting the bracket beam legs, it is necessary to install the cable clamps in time, the brake backs are topped, the iron levers are tied up, and the struts are tied. 12. Construction in strict accordance with the project quality standards, unqualified projects resolutely reinvented. 13. During the construction, various pipelines and pipelines shall be properly protected for protection. The protection methods are: cable landing, trenching and deduction chute (or old belt), burial protection, protection length: no less than 10m before and after the construction site. The protection of various pipelines and pipelines is checked by a special person. 14. When installing slag, clean the surrounding debris to prevent the arm from being hurt. When the two are loading at the same time, they must keep a certain safety distance to prevent the iron smash from colliding. 15. Sprinkle water to reduce dust within 20m before and after the operation. Sprinkle water once before and after shooting. 16. During construction, ensure that the personnel retreat smoothly, and the dismantled and dismantled materials will be transported out of the construction site in time, and placed at no less than 10-15m. 17. During construction, if there is a small area of ​​the roof at the maintenance site, or if the roof is partially leaked, it should be dealt with immediately. The top of the roof should be re-secured, and if necessary, a dense bracket should be installed to control the roof. 18. During the construction, the occurrence of roof accidents should be strictly prevented. If the roof accident occurs accidentally, the roof gas must be fully stabilized, and the gas inspection workers should check the harmful gas content in the roof area; in the case of special personnel watching the mountain, the designated person should handle the live coal danger.矸; special person command, special person to observe the mountain, with the pit wood, bamboo, etc., the top brake is firmly back. 19. When passing pedestrians through the maintenance point, they must obtain the consent of the construction personnel, otherwise they may not pass. 20, precautions when pretending: (1), when the device is installed, the surrounding unrelated personnel must avoid, in order to prevent the tool from hurting. (2) When pretending, it should be taken care of before and after, in case of attack and collision. (3) When installing, it is necessary to check the surrounding safety conditions. After handling the unsafe factors (hidden dangers), it can be installed. (4) When mounting, the two ends should be evenly installed to prevent the vehicle from shifting too much in the center of gravity and causing injury.

(2) Blasting safety measures (attached to the position of the gun warning position and the blasthole layout) 1. When drilling, strictly follow the position of the blasting parameter chart of the blasthole to help the eye. It is strictly forbidden to drill perpendicular to the top. The depth of the blasthole is not less than 600mm, and the maximum charge is not more than half a roll (0.075kg). Wet eyes are used. 2, the peripheral eye margin should not exceed 400mm, the peripheral fundus should fall 50mm outside the contour of the roadway. After charging, the remaining part of the blasthole is covered with gun mud. 3. The gunner must be trained and certified to work. 4. After the explosive detonator is taken out, it must be packed in different special wooden boxes and locked. 5, assembly and introduction: to complete the stent, the top plate is complete, no water, avoid the blasting site of electrical equipment and electrical conductors. 6. It is strictly forbidden to sit on the explosive material box and assemble the medicine. The number of assembly medicines is limited to the quantity required for one shot. 7. The assembly of the explosive charge must prevent the electric detonator from being subjected to vibration, impact, breaking the foot line and damaging the insulation of the foot line. 8. The electric detonator must be installed at the top of the medicine roll. It is strictly forbidden to use electric detonators instead of bamboo and wooden sticks. The electric detonator must be fully inserted into the medicine roll. It is strictly forbidden to insert the electric detonator obliquely in the middle of the medicine roll or on the medicine roll. 9. After the electric detonator is inserted into the medicine roll, the medicine thread must be wrapped with the foot line, and the electric detonator foot line is twisted into a short circuit. 10. It is strictly forbidden to connect the gun busbar to the cable. The busbar should be hung on the side without cable and no electrical equipment. If there is cable, it should be placed at a distance of more than 300mm from the cable. After the shot is over, the busbar is to be recycled. 11. A working surface is not allowed to use explosives produced by different types of manufacturers. It is not allowed to use different types of electric detonators. Fire detonators are strictly prohibited. 12, the explosive detonator is not allowed to litter, strictly enforce the explosive detonator retreat system. The used detonator and explosives should be returned to the powder magazine in time after work. 13. The charging connection is coordinated by the team leader who is fully engaged in the operation of the gun and familiar with the blasting knowledge. The key of the detonator is carried by the blasting officer to prevent one person from connecting and one person to shoot. 14. Before the shot is fired, the person in charge of duty on duty will evacuate the personnel to a safe place, and check the number of checkers. After the accuracy, the gunner can be notified to release the gun. 15. Before the gun is fired, the person in charge of the duty on duty will assign a special person to set up a warning in all the passages that can lead to the shooting position. The warning distance is: the straight lane is not less than 100m, the turning lane is not less than 75m, the guard is going to two people at the same time, one person is alert. One person is responsible for contact, the warning is not in place, the contact person has not returned or the police officer has not reached the warning location, and it is strictly forbidden to shoot. No notice was given to the artillery, and the warning was not allowed. The warning position is shown in the attached figure. 16. When shooting, you must adhere to the "one shot three inspections" and "three-person chain release system." The alert arrangement should be guarded against the exits leading to the roadway shooting location. 17. The liaison officer shall be set up for shooting, and shall not be fired without the notice of the liaison officer. The warning shall not be notified without the permission of the gunner. 18. Each time before the shooting, the brackets within 20m of the reinforcement work site shall be inspected. Before the shot, the tile inspection workers shall check the gas, support, ventilation and other conditions within 20m before and after the shooting position, and the guns may be allowed to be fired if there is no problem. 19. The slag at the working site exceeds the section of the roadway and is prohibited from being shot. It prevents blockage of the roadway and affects ventilation. 20. After the gun is fired, the gun smoke will be blown through the warning line. Only the team leader and the gas inspector can check the presence or absence of residual explosion, refusal, and damage to the bracket. If there is refusal and residual explosion, the bracket is damaged. The hidden danger must be dealt with first, and the operator should be notified to perform the operation after the hidden danger is processed, otherwise the operation is not allowed. 21. After the shot is fired, if there is a bracket that collapses or collapses, it must be straightened out from the outside to the side, and the other work can be carried out after the brakes are firmly held. 22. When dealing with refusal or remnant guns, it must be carried out under the guidance of the team leader and completed in the shift. If the shift is not processed, the blaster on duty must explain to the blaster at the scene. 23. When dealing with residual explosion and refusal, it must comply with the provisions of Article 342 of the “Safety Regulations for Coal Mines”: 24. It is strictly forbidden to put out the cannons and put the cannons. 25. A repair telephone must be installed at the repair location and can be used normally.

(III) Transportation management: 1. The construction site to the sub-living bottom adopts manual loading and manual cart. 2. When the human cart is concentrated, the energy should be concentrated. When the car passes through the corner and the mouth, when there is someone in front, the siren must be issued in advance to prevent the pedestrian from hiding. 3, the same direction of the cart to maintain a safe distance of more than 10m, only one push a car at a time, it is strictly prohibited to fly. 4. When the material is transported by the material handling vehicle, the length of the material shall not exceed the edge of the mining vehicle, and the transportation slag shall not exceed the upper edge of the mining vehicle. 5. Install no less than 2 pull bars at the corner to prevent the rules from widening and falling off. 6. The curve section paves the way, the sleeper is laid in a fan shape, and the outer arc is kept higher than the inner arc track, but the height difference between the two rail faces is not more than 50 mm.

(IV) Gas management system: 1. The team leader must wear a portable gas alarm device. The operation point is to hang the gas alarm device in the return air flow of 5 meters backward. The distance from the top is not more than 300mm, the distance is not less than 200mm, and it is at Working status. 2. The tile inspection worker shall check the gas in the roadway at least 2 times per class.

(5) Transportation route: Transportation route: ground → auxiliary shaft bottom → Dongda alley → maintenance point transportation route: maintenance point → Dongda alley → auxiliary bottom hole → ground (6), disaster avoidance route: flood disaster avoidance Route: Maintenance point → Dongda Alley → Auxiliary bottom hole → Ground fire, gas, coal dust accident avoidance route: the same as the flood disaster avoidance route.

Use 1

Plain Steel Sheet

As a leading enterprise in the galvanized & pre-painted industry in china. Shandong Xinghan Materail Corporation with an annual output of 1 million tons of picking coils. 1 million tons of cold roll. 800,000 tons of hot-dipped galvanized and galvalume steel sheets. 450,000 tons of thicker galvanized steeel sheets.300,000 tons of pre-painted steel sheets. occupies a stable leading position in the industry.

The company has 4 set of cutting and corrugate machines, Plain sheets thickness range is 0.12mm-3.3mm, width range 750-1250mm.

galvalume steel sheet

Metal Plain Sheet,Plain Steel Plate,Plain Steel Sheet,Galvanized Plain Sheet

SHANDONG XINGHAN MATERIAL CORPORATION , https://www.xinghansteel.com