Chinese name: Binandongshi
English name：refuge chamber
Definition: When a disaster occurs, people can not withdraw, to prevent toxic and harmful gases invasion and the establishment of shelter.
Miners self-help, set the refuge chamber is very necessary. Because self-rescuer effective short time, when the wearer self-rescuer after its effective role of time can not reach a place of safety; evacuation route can not pass; if rescuer and harmful gases and higher, the refuge chamber can play a role.
Two model of refuge chamber ；
One is pre-set refuge chamber;