Study on Power Supply System of Permanent Refuge Chamber in Wulan Mine
Abstract：According to The Construction and Management Temporary Provisions of Mine Emergent Refuge System, a study was conducted on the power supply system of the mine permanent refuge chamber in Wulan Mine. A double power supply system was designed and thus the mine electric power and the electric power in surface borehole could be automatically switched within five seconds. With the analysis on the gas explosion disasters occurred in the underground mine, the protection measures of the underground electric cables with a buried depth of 500 mm were provided. Based on the power of the equipment in the chamber clarified, the voltage lost of the cable should be cal- culated and the distance between the surface cable and the underground cable to the refuge chamber should not be over 1 500 m. Mean- while, a plan of the surface borehole and the inner casing pipe layout was provided and the down setting method and fixed method of the cable in the borehole were determined. The safety power supply of the chamber site confirmed the feasibility of the power supply system.
Keywords：permanent refuge chamberpower supply systemelectric cable protectionborehole at surface ground
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 80-82 )