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地球和人体一样,其组成中除固体和液体外,还有气体。人体中气体的流动,对于新陈代谢,维持体内平衡是必不可少的。当人体内气不顺的时候,邪气就会上升,人就会生病。因此,我国古代医书《内经》说:“百病皆生于气”。同样,地球内部气体的流动,对于造就一个适合人类生存的生态环境,对于形成人类社会所必需的矿产,也是必不可少的。但地球也有气不顺的时候,这时候地球的“邪气”也会窜出地表,危害人类。我们把地球内部的气体可统称为地气,把这类灾害称为地气灾害。地气灾害是地质灾害的一种。按地气的成因和性质,地气灾害有以下三种主要类型。 1.火山地气灾害这类灾害发生于火山口附近,还可进一步分为火山水汽灾害和火山毒气灾害。前者主要是引起火山爆炸,产生大量的火山灰,掩埋城市和乡村,并可以产生大雨,引起泥石流;后者主要是使人窒息。火山地气灾害不
Earth and human body, its composition in addition to solid and liquid, there is gas. The flow of gas in the human body is essential for metabolism and maintenance of homeostasis. When the body is not smooth when the gas, evil will rise, people will get sick. Therefore, our ancient medical book “Nei Jing” said: “All diseases are born in gas ”. Similarly, the flow of gas inside the Earth is also essential to creating an ecological environment that is suitable for human existence and to the minerals necessary for the formation of human society. But when the earth is not smooth, the “evil” of the earth will also sprang from the surface and endanger human beings. We call the gas inside the earth can be collectively referred to as geology, such disaster known as the gas disaster. Ground gas disaster is a kind of geological disasters. According to the origin and nature of gas, earthquakes have the following three main types of disasters. 1. Volcanic gas disasters These disasters occur near the crater, but can be further divided into volcanic water vapor disasters and volcanic gas disasters. The former mainly caused volcanic explosions, produced large amounts of volcanic ash, buried cities and villages, and caused heavy rain and mudslides; the latter was mainly suffocating. Volcanic gas disaster is not