① Reasonably determine the number of mine carts to be towed.
The number of mine cars hauled by the electric locomotive must be strictly guaranteed to ensure that the electric locomotive does not skid when it is hauled under heavy load, the braking distance meets the requirements when the heavy load goes downhill, and the temperature rise of the traction motor does not exceed the allowable temperature. Do not increase the number of cars at will.
②The locomotives and mine cars must be checked and repaired regularly, and checked frequently to find hidden dangers and deal with them in time.
③If any of the brakes, lights, alarm (horn), connecting device and sand spreading device of the locomotive is incorrect or the explosion-proof part loses its explosion-proof performance, the locomotive shall not be used.
④ The driving signal instruction is a strict regulation on the running direction, route, driving and stopping of the locomotive. It is used to regulate the operating behavior of the driver, regulate the institutionalization and sequence of the entire transportation system, so as to achieve safe transportation. The "Regulations" stipulate that: locomotive drivers must drive according to signal instructions, and must send a driving signal before driving. It is to require that when the driver receives the driving signal instruction, he must emit a whistle (bell) warning signal to remind the pedestrians in front of the train and the people around the train, and remind the passengers, so as to ensure that the pedestrians, passengers and driving Security.
When the locomotive is running, it is strictly forbidden to stick your head or body out of the car. When the driver leaves the seat, he must cut off the power of the motor, remove the control handle, and tighten the brakes, but the lights must not be turned off.
⑤Because of the frequent interlacing of underground tracks in the mine, there are many roadway bends, and it is difficult to brake the running trains on the track, and it is prone to collisions between trains traveling in opposite directions. In order to avoid such things from happening, when using locomotive transportation, the following regulations should also be observed:
Trains or individual locomotives must be illuminated at the front and red lights at the rear.
During normal operation, the locomotive must be at the front of the train.
Non-motor vehicles are not allowed on the same section of the track. If it is necessary to drive, it must be approved by the underground transportation dispatching station.
The damper through which the train passes must be equipped with a device that can emit sound and light signals that can be received on both sides of the damper when the train passes.
Road signs and warning signs should be installed in the lanes. When locomotives are approaching roadway openings, chamber openings, bends, turnouts, areas with steep slopes or loud noises, and when there are vehicles in front or obstructions to the line of sight, the speed must be reduced and an alarm should be issued.
There must be a miner’s lamp to send an emergency stop signal. In non-hazardous situations, no one is allowed to use the emergency stop signal.
When two locomotives or two trains run in the same direction on the same track, they must maintain a distance of no less than 100m.
The braking distance of the train is measured at least once a year. When transporting materials, it must not exceed 40m, and transport personnel must not exceed 20m. In addition, in curves or sections where the driver’s line of sight is blocked, a train busy blocking signal should be set.
For type mine shaft depots and transportation main roads, a centralized signal blocking system shall be set up.
2. Wiring and line management
①The running track of the overhead electric locomotive shall meet the following requirements:
Between two parallel rails, one copper wire with a cross-section of not less than 50mm2 or other wires with equivalent resistance should be connected every 50m.
All rail joints on the line must be connected with wires or rail seam welding. The resistance at each joint after connection shall not be greater than the provisions in Table 4.4.
The non-returning track and the return track of the overhead electric locomotive must be insulated. The first insulation point is located at the junction of the two types of tracks; the second insulation point is located on the non-returning track, which is between the first insulation point and the non-returning track. The distance between the two must be greater than the length of a train. The insulation points must be checked and maintained frequently to maintain reliable insulation.
When there is a wire rope crossing on the track connected with the line of the overhead electric locomotive, the wire rope shall not be in contact with the track.
②The DC voltage used by the overhead electric locomotive must not exceed 600V.
③From the rail surface, the suspension height of the overhead line of the electric locomotive should meet the following requirements:
No less than 2m in pedestrian lanes, parking yards, and intersections of sidewalks and transportation lanes; no less than 1.9m in pedestrian lanes.
In the parking lot at the bottom of the well, the distance from the bottom of the well to the parking lot is not less than 2.2m.
On the ground or in an industrial site, the place that does not cross other roads is not less than 2.2m.
④The distance between the overhead line of the electric locomotive and the roadway roof or roof beam shall not be less than 0.2m. The distance between the suspension insulator and the overhead line of the electric locomotive shall not exceed 0.25m on each side. The distance between the suspension points of the overhead line of the electric locomotive shall not exceed 5m in the straight section, and shall not exceed the specified value in Table 4.5 in the curved section.
3. Underground charging room management
①The acid-base charging room must be separated, and acid and alkaline storage battery charging facilities and charging are not allowed in the same charging room.
②Explosion-proof electrical equipment must be used in the underground battery charging room. When measuring the voltage, an ordinary voltmeter can be used, but it must be done 10 minutes after the battery cover is opened.
The electrical equipment of the explosion-proof battery electric locomotive used in underground mines must be opened in the garage for maintenance.
③The charging room must be ventilated with a separate air flow, and the return air flow can be introduced into the return air duct of the mining area. When only charging a set of batteries for electric locomotives below 5t, independent air flow ventilation is not required. The concentration of hydrogen in the air must not exceed 0.5% in indoor wind currents and local accumulations.
The underground charging room must be located in the inlet air flow. If the depth of the chamber is not more than 6m and the population width is not less than 1.5m, diffusion ventilation can be used.
With the approval of the chief engineer of the mine, individual charging rooms can be installed in the return air flow, but the biogas concentration shall not exceed 0.5%, and an automatic detection, alarm and power-off device for biogas shall be installed.
④ A water source must be installed in the charging room for frequent flushing of the battery pack. If there is no water source, a temporary storage tank must be installed. There should be a voltmeter, thermometer, and density meter in the charging room.
The container containing the electrolyte must be acid-resistant and strong. When preparing the electrolyte, the sulfuric acid must be slowly poured into the water, and it is strictly forbidden to pour water into the sulfuric acid.
There must be a 5% concentration of sodium carbonate solution in the room to prepare for cleaning when the electrolyte is scalded.
The output power of the DC power supply when charging the charging chamber, the voltage should be greater than 15 times the series voltage of the battery pack, and the current should be greater than the discharge current of the 5h discharge capacity.
