当阳市地质灾害发育规律研究

Researches on the Development Patterns of Geohazards in Danyang City of Hubei

当阳市主要地质灾害类型有滑坡、崩塌、地面塌陷和不稳定斜坡等,其中以滑坡和不稳定斜坡为主,调查与数据统计分析表明,滑坡和不稳定斜坡多发生在碎屑岩构成的陡坡或第四系成因的松散土体中;崩塌多发生在碎屑岩、碳酸盐岩构成且地质构造发育的陡坎、陡崖部位;地面塌陷多与采矿有关;大气降雨是形成地质灾害的重要诱发因素,多雨年份和每年的雨季是地质灾害的多发季节;不合理的人类工程活动诱发了地质灾害的发生。

The main geological hazards in Danyang City include landslide, rock fall,land subsidence and unstable slope, among which the landslide and unstable slope are the major ones. By statistics indicate that most landslides and unstable slopes occur in steep slopes of clastic rock or the Quaternary sediments, rock falls take place in steep slopes and cliffs of clastic or carbonate rocks with well-developed geological structures, most land subsidence are resulting from improper mining. The rainfall usually triggers geological hazards and it＇ s why there are more geohazards happened in rainy seasons and in years with heavy rainfall. Some human engineering activities like mining have similar influence on the geological hazards.