Characteristics and Monitoring Methods of Ground Subsidence in the Gob Area of Beijing West Mountain Areas

The gob area of Beijing are mainly located in the Beijing west mountain areas, resulting in ground subsidence, surface deformation,causing further damage to the ground buildings, roads, railways, pipelines and other linear projects distorted,damaged farmland, forest damage, and even casualties, etc. In recent years, with national and local government industrial policy of gradual adjustment, Beijing gradually shut down all small coal mine, and most of the towns, but the historical legacy of underground mined is still threatening people's lives and property, this paper describes several technical methods for disaster monitoring at home and abroad,attempts to explore technical methods to monitor mining collapse, which is suitable for the Beijing west mountain areas,this will provide a reference for the capital disaster prevention and mitigation.