Mine inclined shaft lifting safety technology

(1) Inclined shaft sports car accident and prevention

Inclined shaft train lifting is a common lifting method for small mines. The working method of inclined shaft truck transportation is: the bottom bottom heavy truck is hung from the bottom of the well to the traction wire rope, and the winch drives the winch to transport the underground minerals to the ground, and the wellhead vehicle is put into the well. bottom. There is also a single rope lifting of the inclined shaft, that is, after the bottom of the well is lifted to the ground, the hook is removed; then the empty car is hung and lowered to the bottom of the well. Inclined well lifting has the advantages of simple equipment, low investment and quick effect.

Because of the frequent picking of hooks in the inclined shaft lifting, and the wire rope is easy to wear and break, it is prone to a sports accident. The consequences are more serious, causing not only equipment damage, but also casualties and production pauses. The causes of sports car accidents are generally: the negligence of the hook worker, pushing the unhooked empty car down to the sports car; the hook work is not properly operated, such as unloading the hook in advance when the vehicle is not fully picked up, causing the unsold vehicle sports car; the wire rope is broken or The connection device breaks and causes the sports car; the hoist brake fails to cause the sports car; when the vehicle is running, the hook pin jumps out to cause the sports car.

To prevent sports car accidents, two principles should be followed. One is to prevent sports car accidents; the other is to avoid accidents after the sports car occurs, especially to avoid personal injury. In accordance with these two principles, the main preventive measures are as follows:

1. The upper part of the inclined shaft and the middle yard should be equipped with a car stop or a car block. When the vehicle passes, it will open and close after passing. The lower and middle yards must be sheltered.

2. The connection between the wire rope and the mine car, as well as the connection between the mine cars, must use a connection device that cannot be detached by itself.

3. Install anti-sports equipment in the inclined shaft.

4. Strictly implement the system of inclining wells without pedestrians and pedestrians, and prohibit people from walking on the transport lanes; when transporting inclined shafts, it is strictly forbidden to hook.

5. When transporting materials, every time before driving, check with the mechanics about the transport equipment and connecting devices. After confirming the correctness, the driving signal can be issued.

6. Strengthen the inspection and maintenance of the wire rope to prevent the occurrence of a broken rope sports car accident. When lowering the flat yard, do not loosen too much rope to avoid the impact damage to the rope when the vehicle suddenly goes downhill.

7. The track should meet the quality standards and be cleaned up in time to prevent the mine car from falling off or running.

8. Strengthen the inspection and maintenance of the mine car and stop using it when it is found that the chassis has open welding and cracks. The connecting device such as the three-chain ring and the plug should meet the requirements, and the unqualified ones must not be used.

9. Always check the hoist brake system to ensure it is in good condition.

10. The hook workers must undergo safety technical training and they can only be employed after passing the exam. It is necessary to strictly follow the operating procedures. Before driving, you must carefully check the number of tractors, the hooks and the connection and loading of each vehicle, and confirm the correctness before issuing the driving signal.

(2) Safety matters for the transportation personnel of the inclined shaft

1. When the inclined well is long and the vertical height is large, special personnel should be used to transport the personnel. In addition to the connection device, each vehicle must be accompanied by a safety chain. The connection device and the fuse chain must have sufficient safety factor. The person and the car should have a ceiling, and should also be equipped with a broken rope fuse. When a rope break or a hook-off accident occurs, the vehicle can be parked automatically (and manually).

2. When the inclined shaft is upgraded by the mining vehicle group, it is strictly forbidden to increase the number of people and goods.

3. In the inclined shaft of the trainer, the signal device must be installed to ensure that the driver can signal the driver at any place during the journey, and the driver can recognize the signals sent by the various levels during multi-level transportation. All the places where the signal is sent and received should be marked with obvious signs.

4. The work of inclined shaft transportation must be managed by a person. The inclined well trucks should be inspected for equipment such as connecting devices, safety chains, fuses, rails and vehicles before operation, and carry out a no-load operation before each class of transport personnel. After confirming the safety, the personnel will be transported.

5. The trainer's train must have a follow-up safety officer, and the follow-up safety officer should sit in the first car with the fuse lever in the direction of travel. The passengers must follow the instructions of the on-board safety officer and get on and off at the designated location. After getting on the bus, the door must be closed and the chain must be hung.

6. The passengers must abide by the management system of the vehicle and the vehicle, obey the command of the driver and the safety officer of the vehicle, and must not be crowded and not allowed to ride; the wellhead and the yard must have waiting rooms, and then get off and get on the train; After the car door must be closed and the car chain is hung, the driving signal can be issued; the passengers are not allowed to poke out of the car to prevent accidents.

7. When the personnel are inclined up and down, the inclined shaft of the getting-off and landing position should have a sufficiently wide sidewalk, generally not less than 1.5m, with good illumination and stepping.

[accident case]

A mine inclined shaft lifting system lacks the proper safety and insurance facilities, and there is no insurance rope and no effective vehicle blocking device. At 4 o'clock on the afternoon of January 2, 1983, the winch lifted 2 mine cars, and at the same time, the battery locomotive and the empty mine car were decentralized. After the winch was running for about 2 minutes, the winch driver found that the wire rope oscillated and the ammeter fluctuated. He braked quickly. At the moment of braking, the front wheel of the string car was lifted, and the heavy car connected behind it fell off and caused the sports car. The sports car whizzed down and rushed to the bottom of the well. The four workers who were waiting to go out of the hook and the two hooks were killed.

In addition to the lack of necessary safety and insurance facilities, there are also illegal operations of hooks, improper connection of the connecting chain, and the lack of strict operation management system for inclined shaft winches. The lack of safe waiting for the diverticulum is the main cause of the accident.

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Jiangxi Mide Industrial Co., Ltd. , https://www.midecrane.com