Methods for the safety and technical management of mine hoisting systems

Mine hoisting refers to the transportation of ore, coal, waste rock or gangue along the mine shaft, as well as the lifting of personnel, equipment and equipment, etc. The following is the safety technical management regulations for mine hoisting systems that I have compiled for you. You are welcome to read and browse.

1. Design selection, arrival acceptance and storage

1. Design selection must comply with relevant national technical policies. Follow the principles of advanced technology and reasonable economy. It has the characteristics of high reliability, low operating cost and convenient maintenance. The equipment purchased should have an appraisal certificate and a production license. Explosion-proof equipment must have a product certificate, explosion-proof certificate and coal mine product safety mark.

After the second design selection, the leader in charge must organize the relevant departments to review the design and then report it to the superior competent department for approval in accordance with relevant regulations before organizing the implementation.

After the third equipment arrives, the relevant departments will inspect the equipment, accessories, random accessories and technical data according to the equipment packing list and technical document requirements. Technical information should have at least the following nine types:

1. Instructions for use

2. Product factory certificate (explosion-proof certificate)

3. Basic drawing< /p>

4. Equipment assembly drawing

5. Braking device structure diagram, system diagram

6. Wearing parts diagram

7 , Electrical schematic diagram, installation wiring diagram

8. Test report of main electrical equipment.

9. Flaw detection report of main components.

Equipment that passes the fourth inspection should be installed, debugged and put into use in a timely manner. Equipment that is not in use temporarily must be properly stored in the warehouse and maintained regularly to prevent sunlight, rain, rust, damage and loss, and fire and theft prevention measures must be taken. It is strictly prohibited to disassemble or disassemble the equipment for use.

2. Equipment installation and acceptance

The equipment installation and acceptance is based on the "Coal Mine Installation Project Quality Inspection and Assessment Standards", and an equipment installation project acceptance outline is prepared.

1. Installation measures and technical requirements

1. Before equipment installation, the mining construction project must be strictly inspected and accepted according to the design to ensure the installation quality.

2. Before the start of the project plan, construction safety technical measures must be formulated and the requirements for ensuring project quality must be clearly defined as installation technical guidelines. The content includes the following categories:

⑴Construction organization design: Documents or written materials for construction preparation and scientific organization of construction should be available.

⑵ The main basis for installation: drawings such as equipment assembly drawings, installation drawings, basic drawings, floor layout drawings, schematic diagrams, relationship diagrams and block diagrams provided by the design department and manufacturers.

⑶Equipment installation: Installation procedures, assembly process requirements, debugging methods and precautions serve as installation guides.

⑷Quality standards: design specifications, equipment installation acceptance specifications, and safety regulations, as the basic guidelines for installation.

⑸The main basis for equipment evaluation: main economic and technical indicators and test reports of performance debugging and testing.

2. Drawings and materials for installation acceptance

1. Equipment factory instructions, certificates, and packing lists

2. Equipment list: including equipment that has arrived, Equipment that has not been installed or equipment that has been ordered has not arrived

3. Assembly drawings and random spare parts drawings

4. Design and construction drawings

5. Upgrading and manufacturing Dynamic and electrical system diagrams

6. Debugging and test reports

7. Concealed project inspection and acceptance records

8. Installation completion drawings and completion reports

9. Installation project quality inspection and evaluation form

10. Construction budget and final accounts

Three key acceptance items and contents in equipment installation

Installation The unit should proactively invite relevant departments to conduct joint inspection and acceptance during the installation process, and keep records of concealed projects to ensure they meet the design and installation standards as evidence of future acceptance and handover.

1. The drum (driving wheel) brake disc or brake wheel has no open welding, cracks or deformation

2. The horizontality of the main shaft and the parallelism of the multi-segment shaft

3. Coaxiality of the coupling

4. Technical measurement of the reduction gearbox

5. Assembly and lubrication of the transmission of the depth indicator and the transmission device

6. Brake disc roughness, end face runout, non-parallelism

7. Electrical system debugging

8. Testing and suspension of main lifting wire rope and tail rope

Completion acceptance of the fourth project

After the installation of the project is completed, the installation unit will conduct self-inspection and acceptance according to relevant standards. After passing the inspection, an application will be submitted to the competent department, and the mining (group) company will organize the design. , construction, equipment management and use units for handover acceptance and evaluation.

1. Inspect engineering technical files, as-built drawings, hidden engineering records, debugging reports, equipment inventory and other information.

2. Conduct random inspections and re-inspections on engineering standards and installation quality.

3. Organize the installation unit and user unit to prepare a trial operation implementation plan and check the trial operation situation.

4. Evaluate the installation quality and fill in the project completion handover report, handover acceptance appraisal letter, and quality certification opinions.

3. Inspection, maintenance and safe operation of lifting equipment

1. Technical measurement, setting and flaw detection

1. Safety inspection of manned hoists is conducted once a year Inspection, other elevators shall be inspected every three years. Braking systems and coupling devices are inspected for defects once a year (three months after defects are discovered), and a qualified unit conducts inspections and issues a report. The mine mechanical and electrical director (deputy chief engineer) must review and sign the measurement and flaw detection reports, put forward rectification suggestions for the discovered problems, and report them to the leader in charge for implementation.

2. The instrument shall be verified according to the prescribed time: Class A shall be calibrated once every six months, Class B shall be calibrated once a year, and Class C shall be verified once before use.

3. The electronic control system setting test is conducted once a year, including the safety protection relay setting test once every six months.

4. The test of winch operating speed chart, brake deceleration calculation, brake time, idle travel time and brake pressure test are valid for one year.

5. The brake shoe gap test setting is valid for 10 days.

6. Winches for negative force lifting and lifting personnel must have electric brakes, and disc brake winches must use power brakes (except variable frequency speed-adjustable winches), and can be put in automatically or manually, and can be used normally. . Power braking, braking torque and secondary braking must have calculation and setting data. When the operation mode changes, it must be recalculated and adjusted. The calculation results comply with the provisions of Articles 432 and 433 of the "Coal Mine Safety Regulations".

7. The test period for motors and high-voltage switchgear is one year.

2. Test cycle and method of safety protection facilities

1. Maintenance worker test items

⑴ Overspeed protection: test the relay once a day without moving the vehicle

　⑵Speed ??limit protection: Test the relay once a day without driving

　⑶Depth indicator failure protection: Simulate failure or test once a day with low-speed driving

　⑷Full warehouse protection: Simulate every day Full warehouse test once

⑸Backup protector: Backup 2m/s speed limit protection, backup overspeed protection, backup over-roll protection, backup deceleration switch test once a week

⑹Wellhead operation Vehicle equipment, safety doors and signal locking: test once a day without running the vehicle

⑺ Commutator fence door locking: test once a day without running the vehicle

⑻Signal locking: test once a day without running the vehicle< /p>

⑼The rope loosening protection test is performed once a day without moving the vehicle. After the rope is loosened, the coal bunker is locked and the skip is successfully passed through the unloading curved track. The display device is inspected and tested every 10 days

⑽ Over-voltage and under-voltage protection of the oil pressure system: over-temperature protection is tested once a week without running the vehicle

For the above protections, if one of the protections ⑴, ⑵, ⑶, ⑷, ⑹, ⑺ and ⑻ fails, it must The vehicle must be processed immediately when the vehicle is parked, and the vehicle can be driven only after it passes the test. If the failure of protections ⑸, ⑼, and ⑽ fails, it must be processed and passed on the same day.

2. Operation driver test items

⑴ Over-roll protection: Simulate over-roll test once per shift

⑵ Under-voltage protection: Test once per shift without moving the vehicle

⑶ Brake gap protection (alarm): test the brake shoe wear switch every shift without running the train

⑷ Loose rope alarm: test once every shift without running the train

⑸ Emergency brake switch: Test once per shift without moving the vehicle

The above five protections must be sensitive and reliable. If any one of the protections fails, the vehicle must be stopped and reported, and the vehicle can be driven only after it has been repaired and passed.

Management of other facilities of the three lifting systems

1. Selected lifting containers, man-carts (inclined shafts, tunnels), mine cars (including connecting chains, bolts), cages, and skips Buckets, connecting devices, anti-fall devices, supporting tanks and anti-squatting tank buffer devices must have coal mine product safety signs.

2. In the lifting system with a lifting speed greater than 3m/s, anti-collision beams and tank supporting devices must be installed, and the anti-collision beams must not be used for other purposes. The anti-collision beam must be able to block the container or counterweight that rises after being rolled up; the tank holding device must be able to hold the container or counterweight that falls after hitting the anti-collision beam, and ensure that the distance it falls does not exceed 0.5m.

3. Strengthen the management of anti-fall protection facilities for lifting containers, conduct regular tests, and form a formal report. Carefully fill in the date, location, data, conclusions, etc., and the deputy mine manager in charge of the mine (deputy chief engineer) ) and archive it after signing.

⑴Shaft cage anti-fall device: non-decoupling inspection test once every 6 months; decoupling test once a year.

⑵ Falling prevention device for pedestrians in inclined shafts: The manual brake drop test without removing the hook should be conducted once per shift. For pedestrians with the hook removed, a manual brake drop test should be conducted again before each operation, and the rope should be loosened when stationary. The gate drop test is performed once a month, and the heavy-load full-speed decoupling test is performed once a year.

4. The gap left between the tank lugs of the vertical shaft hoisting container and the tank channel during installation, as well as the inspection and maintenance of the tank channels and tank lugs, must strictly follow the provisions of Articles 385 and 386 of the "Coal Mine Safety Regulations" implement. The minimum gap between the vertical shaft lifting container and the shaft wall, tank beam, and shaft beam must comply with the provisions of Article 387 of the "Coal Mine Safety Regulations".

5. The effective gap between the inclined shaft lifting containers shall not be less than 0.2m; the gap between the outside of the container and the two sides: the pedestrian side shall not be less than 0.8m, and the non-pedestrian side shall not be less than 0.3m.

6. The wedge-shaped tank channel, anti-collision beam, tank supporting device and anti-squatting buffer device should be inspected once a month and records should be kept.

7. Safe and reliable safety doors must be installed at the wellhead, well bottom, intermediate level and the second-floor platform at the well head and bottom of the vertical shaft for lifting personnel. The safety door must be interlocked with the tank position and lifting signal, and its requirements should be Comply with Article 384 of the "Coal Mine Safety Regulations". Facilities to prevent people from entering the tank should be set up on the side that is not for people entering and exiting. It is strictly forbidden to leave the tank on the entry side, and it is strictly forbidden to enter the tank on the exit side. When you need to work on top of a lifting container due to maintenance of shaft equipment or accident handling, the container must be equipped with an safety umbrella.

8. When the safety door of the cage is in place and the leveling and layer-changing signals are issued, the elevator should ensure that it can only operate at a speed of 0.5 to 1m/second.

Four lifting signal systems

1. The lifting signal must be transmitted step by step, that is, the hook worker in the yard transmits the signal to the wellhead, and the hook worker passes the signal to the winch room from the wellhead. The wellhead signal must be blocked with the winch control loop. The signal does not control the winch's safety circuit.

2. The buttons and "stop" buttons used in the signal control device should be set separately. The stop signal doubles as an emergency stop signal. "Stop" and "emergency stop" signals at various locations lead directly to the garage. When the "stop" signal is sent and the winch stops running, no matter where the container is, if the "start" signal is not sent, the winch cannot start and the working brake cannot be opened.

3. The improvement signal has both sound and light, and the sound and light of the parking signal and the working signal are different. The parking signal alarm must use a single-click electric bell or electric whistle; the indicator lights of the parking signal and the working signal must be set separately and have obvious differences. When a set of lifting devices provides several levels of lifting, the signals sent by each level must be different.

4. When using multi-layer cages to lift people or materials, they must have signal lockouts that comply with Article 395 of the "Coal Mine Safety Regulations".

5. In addition to the commonly used signaling devices, there must also be backup signals. When lifting an inclined shaft, a special system for lifting materials also needs an emergency stop signal from the bottom of the shaft yard and each horizontal yard directly to the winch room; a special system for lifting personnel also needs a manned traffic leakage communication device; a system for people to lift together, there is The emergency stop signal and pedestrian leakage communication device in the well bottom parking lot and each horizontal parking lot are directly connected to the winch room.

6. When lifting double-hook tandem vehicles in inclined shafts, the error code (tank-hook) signal must be set.

7. A direct telephone or microphone must be installed between the bottom of the pit and the wellhead, and between the wellhead and the winch room.

Five lifting system technical transformation

1. International and domestic advanced technologies and products should be actively adopted to carry out technical transformation of the old lifting system in use to improve the reliability of the system. Reduce operating costs.

2. Major technical transformation of the lifting system must be proposed by the mine on the basis of research, technical demonstration organized by the mining (group) company, and submitted to the superior department for approval in accordance with relevant regulations.

3. The technical transformation design plan must comply with the "Coal Mine Safety Regulations" and relevant national regulations, and must be advanced to a certain extent. Technical transformation must optimize the matching of the entire hoisting system. Sufficient attention should be paid to the important links that affect system reliability, such as the main shaft loading weight measurement link, brakes, anti-skid protection, over-reel and over-discharge protection devices and other products and technologies. Pay attention to. When using computer technology, it must be designed according to electromagnetic compatibility technology, and technical indicators must be tested according to relevant national standards to ensure the safety and reliability of the improved system.

4. After technical transformation, it must be inspected and accepted by the approval department before it can be put into operation. An acceptance report must be issued, and relevant technical documents and drawings must be modified at the same time and recorded in the technical files.

Six management of hoisting wire ropes

1. Correctly select hoisting wire ropes. Wire ropes used for important purposes should not be of point contact type. In addition to strictly complying with Articles 400, 407, and 416 of the "Coal Mine Safety Regulations" and having coal mine product safety signs when selecting wire ropes, the following factors should also be considered:

⑴ Co-directional twisting should be used for vertical shaft lifting Galvanized steel wire ropes and cross-twisted steel wire ropes should be used for inclined shaft string car lifting.

⑵ When the water in the wellbore is large or the pH of the water is high, and when the wellbore is lifted as a return air shaft, galvanized steel wire ropes should be used as much as possible.

⑶ Surface contact wire ropes or triangular strand wire ropes with thicker outer steel wires should be used to lift inclined shafts; special-shaped strand wire ropes and line contact wire ropes should be used to lift vertical shafts.

⑷Friction wheel hoists must use half-twisted left and right wire ropes of the same specification, and non-rotating wire ropes should be used for the tail ropes.

⑸The tank rope should be sealed with a steel wire rope.

2. Use, inspection and maintenance of elevator wire ropes

⑴ Wire rope inspection shall be strictly in accordance with Articles 398, 399, 400, 401 and 402 of the "Coal Mine Safety Regulations" regulations are implemented. The cut length of the rope head to be inspected shall not be less than 1.5m. The lifting rope in use shall cut the rope head close to the end of the container. The length of the rope cut by heating method needs to be extended by 200mm.

⑵ The service life of the friction wheel lifting wire rope shall not exceed 2 years, and the service life of the balancing wire rope shall not exceed 4 years. If the wire rope's broken wires, reduced diameter and degree of corrosion do not exceed the provisions of Articles 405, 406 and 408 of the "Coal Mine Safety Regulations", it can continue to be used, but not for more than one year.

⑶Inspection and records of wire ropes for lifting and other purposes must comply with Article 404 of the "Coal Mine Safety Regulations". The head of the electromechanical district and the person in charge of the electromechanical management department review and sign the wire rope inspection records every ten days. The electromechanical management department organizes a monthly analysis and summary, and has analysis and summary data.

⑷When the inspection results of the lifting wire rope reach the values ??specified in Articles 405, 406, 407 and 408 of the "Coal Mine Safety Regulations", they must be replaced immediately. If the wire rope is subjected to violent impact and tension, it should be stopped immediately for inspection. If no new broken wires or diameter reduction are found, it can continue to be used. If the length of the wire rope increases by more than 0.5% compared with the original length due to sudden force, the rope should be replaced with a new one.

⑸The length of the balance wire rope must be adapted to the over-coiling height of the lifting container, and prevent damage to the balance wire rope during over-coiling.

⑹The lifting device must have a spare wire rope that has passed the test. For wire ropes in use, oil should be applied at least once a month according to the tunnel conditions and corrosion conditions. The wire rope of the friction wheel lifting device must only be coated or dipped in special wire rope oil (friction-increasing grease), otherwise it does not need to be oiled, but the part that does not bypass the friction wheel must be coated with anti-corrosion oil.

⑺The connection between the vertical shaft lifting container and the lifting wire rope should use a wedge-shaped connection device. Every time the steel wire rope is replaced, the main stress-bearing parts of the connecting device must be inspected for flaw detection, and they can only be used after passing the test. The cumulative service life of the wedge connection device: single rope lifting shall not exceed 10 years; multi-rope lifting shall not exceed 15 years.

⑻ When storing steel wire ropes, a layer of solid grease should be applied to the surface and stored in storage to prevent corrosion.

⑼ The steel wire rope must not be bruised or squeezed during transportation and handling.

⑽ Lined sheaves should be used for vertical shafts and inclined shafts, and padded rollers should also be used for inclined shaft track rollers.

Seven oil quality management

1. Strengthen and improve equipment lubrication management. Based on the characteristics and actual operating conditions of each equipment, establish the "five certainties" of lubrication (determination of personnel, quality, and (Quantitative, fixed-point, regular) system and keep records of oil changes.

2. The oil used in the hydraulic station must be replaced at least once a year, and must be tested and sampled every six months; anti-wear agents must be used in the reducer lubricating oil, which must be sampled and tested every six months, and cleaned and filtered every two years. Or change the oil.

3. Lubricant must be inspected and passed the inspection before it can be put into storage, and must be properly kept and distributed quantitatively.

Eight special promotions

1. Promotions other than the normal "acceleration, constant speed, deceleration, and parking" procedures are special promotions.

2. When special promotion requires lifting certain protections or blocking certain functions of the signal system, reliable safety measures should be formulated. Executed after approval by the engineer.

3. When performing special lifting, the speed should comply with the following regulations

⑴ When using a cage to transport oil explosives, the operating speed shall not exceed 2m/s; when transporting other gunpowder, the operating speed shall not exceed 4m/s. The driver must not cause the lifting container to vibrate when starting and stopping the operation of the hoist.

⑵ When lifting special large-scale equipment (items) and long materials, their running speed should generally not exceed 1m/s.

⑶The speed of manual rope inspection is generally not greater than 0.3m/s

⑷When personnel need to stand on the top of the lifting container for maintenance of shaft equipment or accident handling, the lifting container must The running speed is generally 0, 3 ~ 0, 5m/s.

4. When lifting or lowering an object that exceeds the normal load, the braking torque needs to be recalculated, and the safety factor of the wire rope, suspension or connecting device must be checked. After meeting the requirements, safety technical measures shall be formulated and approved by the Mining Machinery and Electrical Mine. It can only be implemented with the approval of the chief engineer (deputy chief engineer), the person in charge of the safety supervision department, and the chief engineer. When the braking system needs to be adjusted, the electromechanical work area will designate a dedicated person for on-site command, and the electromechanical management department will send someone for on-site supervision. Once the upgrade is completed, the system will be restored in a timely manner. For the lifting and transportation of equipment with extremely long dimensions and heavy weight, simulation tests with the same weight and load should be carried out in advance.

5. Special promotions must be operated by the driver and monitored by the deputy driver.

Nine lifting system maintenance work

1. Each mine must conduct periodic maintenance in a planned manner based on the operating characteristics and status of each lifting system.

2. Before maintenance, the "Maintenance Task Book", maintenance quality standards, safety technical measures, labor organization, construction network diagram and construction progress chart should be carefully prepared, and all maintenance personnel should be organized to study.

3. A person in charge should be designated for each maintenance task. When multiple units are operating at the same location at the same time, one person must be under unified command and the division of labor must be clear. A maintenance command group should be established for major maintenance projects.

4. The planned maintenance time should include the specified trial operation time. Detailed records must be kept after maintenance, which mainly include the changes in technical parameters of the maintenance components and their reasons, with simplified diagrams attached, forming a formal report and keeping it on file for future reference.

5. To improve the daily maintenance of the system, ensure 2 to 4 hours of inspection and maintenance time every day. There will be no less than 12 production shutdown days throughout the year for maintenance.

Operation and maintenance of the ten hoisting systems

1. According to the equipment performance and operating characteristics of each hoist, formulate technical operating procedures to ensure comprehensive content, clear procedures and consistent The actual scene matches.

2. Drivers must be trained, familiar with the structure, performance, technical characteristics, and operating principles of the equipment, master the relevant provisions of the "Coal Mine Safety Regulations" and the rules and regulations of the garage, and obtain the certificate after passing the examination , work with a certificate.

3. Lifting system maintenance workers and wire rope inspectors must undergo professional technical training and obtain certificates after passing the examination.

4. To improve system maintenance, focus on the following tasks.

⑴ A chartering mechanism must be established for equipment maintenance and the responsibilities of charter personnel must be clearly defined.

⑵ Regular inspection and testing of various protective devices and safety facilities to ensure sensitivity and reliability.

⑶ The "three modernizations" should be done according to the actual situation of each hoist, that is, the maintenance and inspection cycle should be institutionalized, the maintenance content should be regularized, and the maintenance procedures should be made technological.

⑷ Carefully prepare various rules, regulations and standards for the use and maintenance of equipment, organize maintenance personnel to learn business knowledge about the structure, performance, use, maintenance and safety technology of equipment, and master the "Coal Mine Safety Regulations" ” and “Mechanical and Electrical Equipment Maintenance Standards” and “Mechanical and Electrical Equipment Integrity Standards” related to various regulations on the lifting system, and conduct theoretical and operational examinations.

⑸ Keep maintenance inspection records, including inspection items, time, and opinions on how to deal with problems found. The technical leader of the electromechanical district team should check and sign every month.

(11) Improve system technical data management

Improve technical files to achieve one file per machine.

1. Technical data archive details

⑴Original design, installation drawing (installation and commissioning test receipt), and instruction manual of the winch.

　⑵Equipment modification installation diagram

　⑶Brake device structure diagram and system diagram

　⑷Visible parts diagram

⑸Electrical Schematic diagram and wiring diagram

　⑹Additional protection installation diagram and control diagram

　⑺Lifting signal diagram

　⑻Wellbore device diagram and layout diagram (including derrick, well Bottom layout)

⑼ Steel wire rope factory certificate, test report and update record

⑽ Anti-fall device test report

⑾ Technical measurement and setting, analysis report< /p>

　⑿ Braking torque verification data

　⒀Flaw detection report

　⒁Elevating device annual inspection report and monthly shutdown maintenance records (including actual measured numbers

Data, parts replacement)

⒂ Major and above electromechanical accident analysis report

⒃ Economic operation analysis report, operating unit consumption

⒄ Related coal mines Mining product safety sign information

2. Each lifting system must establish the following system

⑴ Critical site management system (posted at the door)

⑵ Position responsibility system , charter system (station in the machine room), responsibility system for signal workers and handlers (station at the wellhead and bottom)

⑶ shift handover system (station in the machine room)

⑷ induction of leading cadres System (machine room installation)

⑸ Operating procedures (machine room installation)

⑹ Safety protection device daily inspection and test system

⑺ Equipment regular maintenance system

　⑻Equipment patrol inspection system

　3. Each lifting system must have the following records

　⑴Daily maintenance inspection records (stored in the machine room)

　⑵Electrical Maintenance day inspection and test records (stored in the machine room)

⑶ Daily inspection records of wire ropes (stored in the machine room)

⑷ Shift handover and operation log records (stored in the machine room)

⑸ Cadre induction records (stored in the machine room)

⑹ Wellhead operating equipment, safety door locking and signal daily test records (stored in the team)

⑺ Outsider registration records (stored in the machine room)

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⑻ Lifting system accident records (stored in the machine room)

⑼ Equipment maintenance records (stored in the machine room)

⑽ Wire rope test and replacement records (archived)

⑴ Braking system diagram

⑵ Electrical schematic diagram

⑶ Equipment floor plan

　⑷Visiting inspection chart

　⑸Winch assembly drawing and technical characteristics card

　(12) Lifting system spare parts and spare parts management

1. Implement classified management and implement account management for special parts required for equipment.

2. Carry out the acceptance, warehousing, storage and maintenance of spare parts.

3. Establish an old parts recycling system and do a good job in repairing and reusing old parts. Repaired spare parts must be submitted to the spare parts warehouse for registration in a separate register.

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