How to choose a firewall location?

On the premise of ensuring the fire extinguishing effect and the safety of firefighters, the position of the firewall should make the closed fire area as small as possible, and the number of firewalls should be as few as possible, which is conducive to the principle of rapid trial operation. The selection shall meet the following requirements:

(1) In order to facilitate firefighters to build a firewall, the firewall should not be too far away from the fresh air, especially the air inlet side should be as close as possible to the fire source, generally not more than 10m and not less than 5 m, so as to leave room for building another firewall;

(2) The surrounding rock within 5 m before and after the firewall should be stable to ensure the safe operation and watertight quality when building the firewall;

(3) Convenient transportation of materials for building firewalls;

(4) There should be no crosswind between the firewall and the fire source, so as to avoid the airflow reversal after the fire area is closed and bring explosive fire gas and gas back to the fire source to explode.