我国山地面积约占全国总面积的70％左右。由于山区具有多种自然地质灾害发生和发展的自然地质条件,因而在山区开发中对地质灾害的研究和防治就成为工程地质工作者面临的重要任务。随着我国工程经济活动的(?)展,尤其是近年年来陆续发生了大型滑坡,如盐(?)河滑坡(1980)、四川盆地暴雨滑坡(1981)、长江云阳鸡扒子滑坡(1982)、甘肃东乡酒勒山滑坡 China’s mountainous area accounts for about 70% of the total area of ​​the country. Due to the natural geological conditions that occur and develop in a variety of natural geological disasters in mountainous areas, the research and prevention and treatment of geological disasters in the development of mountainous areas have become an important task for engineering geologists. With the economic development of China’s engineering (?), Especially in recent years, large-scale landslides have taken place successively, such as salt (?) River landslide (1980), Sichuan Basin heavy rain and landslide (1981) ), Gansu Dongxiang Jingle Hill landslide