The Coal Mine Safety Regulations specify the conditions to be followed for the installation of local

According to the provisions of the "Coal Mine Safety Regulations" on the power supply of underground local ventilators:

1. The ventilator of the local capacity part in the excavation face of the low-gas mine can be powered by the power supply line equipped with a selective leakage protection device, or the power supply can be separated from the coal mining face.

2. In the gas injection area, high gas mine, coal (rock) and gas outburst mine, the local ventilator of the excavation face should be powered by three special (special transformer, special switch, special line); It is also possible to use a power supply line equipped with a selective leakage protection device for power supply, but a special person should check it once a day to ensure the reliable operation of local ventilators.

3. Wind power locking must be implemented at the location where local ventilators are used for air supply, so as to ensure that the power supply of all non-intrinsically safe electrical equipment in the wind shutdown area is cut off after the wind is stopped; If two local ventilators are used for air supply, both local ventilators must realize wind power locking at the same time.

Here are a few points: 1. Adopt dual-loop power supply mode and can have the function of automatic switching; 2. Implement wind power, gas and electricity interlocking protection; 3. Install the air pressure sensor locking device of the hair dryer; 4. The air supply volume of the local ventilator must meet the minimum air volume requirements required by the excavation face or single-head roadway; 5. The installation position of the local ventilator must be set on the air inlet side greater than 10 meters away from the return air outlet; 6. The work record card of equipment maintenance, inspection and maintenance must be placed at the local ventilator; 7. Local ventilators must be placed on special tables and racks, and it is forbidden to place them directly on the ground; 8. The hair dryer of the local ventilator must be tight and not leaky, and there is a special person to check and deal with it in each shift, 9. Use special cables, special switches, and special transformers.

The local ventilator in the underground coal mine must at least do the above points to ensure the safety production of the personnel in the tunneling or single-head roadway, to ensure that the toxic and harmful gases in the roadway will not cause harm to the human body, and to prevent the occurrence of major accidents.

Dual power supply, double circuit, main and auxiliary office fan locking device.

What is the purpose of the mine anti-wind exercise, is there a fire in the mine, and the cable is not afraid of burning. Besides, the fire source management regulations of the anti-wind exercise, the underground power supply should be cut off before the anti-wind exercise, and the power is gone, so how can you turn the fan.

No power outage, gas enters the local fan after the anti-wind, and the consequences are serious.

The coal mine in Zhijin Santang is the best and sulfur-free.

The coal mines in Zhijin are all anthracite, and it is difficult to say that the coal there is the best, because the key is what kind of indicators do you need, such as calorific value? Sulfur content? Fixed carbon, etc., if thermal coal is basically considered calorific value, other chemical coal may consider other indicators according to their own needs, so it cannot be said that the best coal.

Generally, it is outside the air door in the 75 belt roadway, that is, the full air pressure ventilation place, of course, you put it directly outside the air door of the roadway.

High gas and low gas mines require that the installation site be not less than 10 meters away from the return air outlet; After the fan is operated, there is enough rich air volume from the fan to the return air outlet.