一、地质灾害的含义和种类地质灾害是地球不断演化过程中,地理环境在地质作用长期影响下不断变化,其变化有时表现得异常强烈,从而对人类生存与发展产生严重威胁和破坏的自然现象。地质灾害的种类很多,如地震、火山喷发、构造断裂、地裂缝、滑坡、泥石流等,其中由地震、火山喷发 First, the meaning and types of geological disasters Geological disasters are the natural evolution of the earth, the geographical environment under the long-term effects of geological changes under the influence of its changes sometimes appear exceptionally strong, and thus to human survival and development of a serious threat to and destruction of natural phenomena . Many types of geological disasters, such as earthquakes, volcanic eruptions, tectonic fractures, ground fissures, landslides, debris flow, etc., which by the earthquake, volcanic eruptions