Proposal of revision for electrical section of Coal Mine Safety Regulatio

The paper proposed that low-power and non-explosion-proof equipments such as general lighting lamps, equipments and instruments of communication and automation are prohibited to be used in coal mine underground; lighting lamps should adopt LED cold light source and be preferred intrinsic safety type or compound type of other explosion-proof types such as intrinsic safety type and encapsulated type or flameproof type; equipments and instruments of monitoring, communication, surveillance and control used in coal mine underground should be preferred intrinsic safety type, signals transferred among the equipments must be intrinsic safety signals; high-power electrical equipments should be preferred flameproof electrical equipments and wiring chamber and primary chamber of flameproof electrical equipments should be setup independently. It proposed that mine-used communication and signal cable and optical fiber can be coiled down. It proposed that mine-used cable connected with flameproof electrical equipments should be resistant to blast; the mined-used communication and signal cable and optical fiber are prohibited to directly connect with sole flameproof electrical equipments; the mine-used communication and signal cable and optical fiber connected to flameproof and intrinsic safety electrical equipments must be resistant to blast. It proposed that aluminum core cable is prohibited in coal mine underground. It proposed that under-voltage protection and loss-voltage protection for local ventilator should has delay measures; besides sites such as tunneling, exploit and temporary construction, use of local ventilator should be reduced as far as possible; it is prohibited to use local ventilator to dilute gas of upper corner in working face with whole wind pressure ventilation. It proposed that miner lamp should adopt LED cold light source and intrinsic safety type or compound type of other explosion-proof types such as intrinsic safety type and encapsulated type; electricity power transferred among light source and lamp cord (separation of battery and headlight) must be intrinsic safety type; incandescent lamp and other special miner lamps are prohibited to be used in coal mine underground.