主持人:我们是从事煤矿生产的小型企业,煤矿火灾是企业的重大灾难,请问井下火灾发生的主要原因和防止火灾蔓延的措施是什么?内蒙古张晓群张晓群先生:井下火灾发生的原因主要有以下几点:1.井口附近地面的建筑、设备等发生火灾,蔓延到井下;2.在井下使用明火(电焊、气焊等),防火措施不力,引燃可燃物; Moderator: We are engaged in the production of small coal mines, coal mine fire is a major disaster for enterprises, may I ask What are the main causes of underground fire and prevent the spread of fire? Zhang Xiaoqun Mr. Zhang Xiaoqun: underground fire occurred mainly due to the following Point: 1. The surface of the wellhead near the building, equipment and other fires, spread to the underground; 2. The use of open fire underground (welding, gas welding, etc.), poor fire prevention measures, ignition combustibles;