天然气火灾曾经在地下坑道内多有发生,造成许多人死亡。2007年在东京涉谷区温泉设施内发生的火灾仍记忆犹新。本文介绍的是日立市消防本部管辖内发生的在对地质做调查进行勘探作业时,突然喷出天然气引起火灾的案例。万幸的是本次火灾未造成伤亡,而且火灾发生的场所是荒地,未向周边延烧。由于喷出的是天然气,因此灭火非常困难,整个灭火过程用了3个多小时,而且,是在现场无人的状态下 Natural gas fires occurred in underground tunnels many times before, killing many people. The fires that occurred in the hot spring facilities in Shibuya-ku, Tokyo in 2007 are still fresh in my memory. This article describes the Hitachi City Fire Department headquarters jurisdiction occurred in the investigation of the geological exploration operations, the sudden spurt of natural gas caused a fire case. Fortunately, this fire did not cause any casualties, and the place where the fire broke out was a wasteland and did not spread to the surrounding area. As the natural gas is ejected, it is very difficult to extinguish the fire, and the entire fire extinguishing process took more than three hours. Moreover, it was in the scene without people