05 General Requirements for Personal Self-Rescue Equipment in Mines and Tunnels

According to Circular 50, personal self-rescue respirators must meet the following general requirements:

- Before being put into use, they must be inspected and tested to determine technical parameters.- Personal self-rescue respirators that have been opened, have expired, or fail to meet technical requirements during inspection and testing must be destroyed.- Personal self-rescue respirators must be recorded in a monitoring log from the time they are put into use.- Environmental conditions for using personal self-rescue respirators in absorption mode:- Oxygen (O2) content not less than 17%;- Carbon monoxide (CO) content not more than 1%;- Carbon dioxide (CO2) content not more than 2%.- Regarding the provision of personal self-rescue respirators:- Workers must be equipped with personal self-rescue respirators when in underground mines.- Underground mines with flammable, explosive, toxic gases must have a number of personal self-rescue respirators exceeding the number of workers by 10%. Mines without flammable, explosive, toxic gases may have a number of personal self-rescue respirators less than the total number of workers listed working in the mine.- For underground mines classified as III or higher according to methane gas and Group II sulfide ore mines, workers in these areas must be equipped with isolating self-rescue respirators.

See more related regulations at Circular 50/2018/TT-BCT effective from January 18, 2019.

- Thanh Lam -

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