矿井火区是指在矿井内由于发生火灾而用防火墙封闭了的地区。防火墙在这里起着隔离火区,使之与大气失去连通的作用。因此当火区隔绝的很好时,其内部空气成份由于煤炭的燃烧便逐渐发生变化,二氧化碳(CO_2)含量迅速增高,而氧(O_2)含量减低,最后由于缺氧导至火灾的熄灭。但是实际情况往往不是如此顺利,因为没有不透风的防火墙,火区周围的煤柱也不是绝对严密的,所以往火区内部漏风就成为必然现象。由于漏风,新鲜空气进入火区内 Mine fire area refers to the mine in the fire as a result of a closed area with a firewall. Firewalls here play a separate fire area, so that the loss of connectivity with the atmosphere. Therefore, when the fire zone is well isolated, its internal air composition gradually changes due to the combustion of coal, the content of carbon dioxide (CO 2) rapidly increases, and the content of oxygen (O 2) decreases. Finally, the lack of oxygen leads to the extinguishment of the fire. But the actual situation is often not so smooth, because there is no air-tight firewall, coal pillar around the fire area is not absolutely tight, so the air inside the fire area has become an inevitable phenomenon. Fresh air enters the fire zone due to air leakage