Mine fire fortune telling _ mine fire

What are the causes of mine electrical fire accidents and what are the preventive measures?

Due to improper use and maintenance, mine electrical equipment, lighting equipment, power tools and so on will have fire accidents. The reasons are usually: improper equipment selection; The line is in disrepair for a long time, and the insulation aging causes short circuit; Overload operation; Poor maintenance leads to joint looseness; Electrical equipment is dusty and humid, and the heat source is close to electrical appliances and inflammable and explosive articles; Poor ventilation and heat dissipation; Welding Mars ignites flammable materials, etc. According to the investigation of underground mines, the fire accidents of low-voltage rubber-sheathed cables account for more than 70%, followed by armored cables, mining transformers, light bulbs and electric furnaces, and other fire accidents (electric locomotives, etc.). ). Preventive measures for mine electrical fire mainly include: (1) Select qualified non-combustible rubber sheathed cable for mine, and the suspension of the cable shall meet the requirements of Mine Safety Regulations. (2) Avoid external force hitting the cable. After the switch trips, it is forbidden to repeat power transmission without finding out the reason. (3) Cables are not allowed to be stacked or buried, and flammable items are not allowed to be stored near the cable junction box. (4) To correctly grasp the connection method of cables, binding method and crimping method cannot be used. (5) The insulating oil used in mining transformer should be tested regularly, and the unqualified oil should be replaced in time. (6) Underground light bulbs and electric furnaces are not allowed to be used for heating. (7) The electromechanical cavern shall be supported by incombustible materials, and flammable materials are not allowed to be stored, and fire doors shall be set. (8) Welding operation shall be carried out with a hot certificate, and fire prevention measures shall be taken.