Mine underground explosion-proof power distribution system project
Project overview
Provide a complete set of explosion-proof power distribution equipment for the underground mining, ventilation, and drainage systems of nickel mines, covering explosion-proof transformers, explosion-proof switches, mining cables, and supporting underground power supply monitoring systems.
Indonesia fit
Unified delivery of explosion-proof transformers, explosion-proof switches, mining cables, monitoring systems, acceptance documents and 24-hour after-sales service to mine owners, solving the problems of long procurement cycles, unclear certification and high risks of underground maintenance in remote mining areas; the solution is adapted to the high temperature and humidity, dust, narrow lanes and restrictions on personnel entering the nickel mine in Sulawesi.
Professional configuration and standards
The explosion-proof equipment is configured in accordance with IEC 60079, IEC 62271/61439, and the flame retardant and wear-resistant requirements of mining cables. The explosion-proof level is Ex d I Mb or confirmed according to the on-site hazardous area classification. The key equipment has the MA mining safety mark and is accompanied by Indonesian mine safety inspection and acceptance data; explosion-proof surface inspection, pressure resistance, insulation, grounding, temperature rise, interlocking, remote monitoring and protective action tests are completed before delivery.
Key specification comparison table
| Configuration items | common practice | Optimized delivery specifications and value |
|---|---|---|
| Explosion-proof level | General industrial power distribution equipment | Ex d I Mb explosion-proof equipment, suitable for underground explosive environments |
| Cable material | Ordinary rubber sheathed cable | Flame-retardant, wear-resistant and moisture-proof cable for mining, suitable for laying in narrow tunnels |
| Operation and maintenance method | Mainly personnel go down to conduct inspections | Ground monitoring + fault location + on-site response to reduce downhole risks |
Delivery challenges and solutions
a.Challenge: There is a risk of gas and nickel ore dust explosion underground, and explosion-proof compliance requirements are strict.
Solution: The entire series of equipment has the MA mining safety mark, explosion-proof grade Exd I Mb, and fully complies with Indonesian mining safety regulations.
b.Challenge: Underground conditions include high temperatures, high humidity, and narrow spaces. Equipment is easily damaged by moisture, making troubleshooting difficult.
Solution: The moisture-proof and explosion-proof integrated design reduces the equipment failure rate by 80%; a ground remote monitoring system is built to remotely locate faults, and the troubleshooting time is shortened from hours to 30 minutes.
c.Challenge: The mine is located in a remote location, making it risky and inefficient for operation and maintenance personnel to go down the mine.
Solution: Ground remote monitoring reduces the number of downhole inspections, and an on-site operation and maintenance team is deployed to respond 24 hours a day.
Project results
The entire system passed the Indonesian mine safety inspection and acceptance, with zero safety accidents; the average annual maintenance cost of equipment was reduced by 70%; the operation and maintenance labor cost was reduced by 50%.