Xi Ning Lin Jia Ya Dangerous Rock Mass Deformation And The Research Movement Characteristics

Lin Jia ya dangerous rocks located in Xi Ning Bei Shan foreslope lots, this region is more concentrated in Xining personnel property, landslides most intensive flow disaster, threatening the most significant regions. Due to climate and human engineering activities, in recent years, Lin Jia ya regional landslide disasters occur frequently, people of this region lives and property posed a great risk. Thesis mainly Chinese Academy of Geological Sciences Project "Large-scale Landslide Disaster in Qing Hai Huang Shui River Valley Mechanism and Mrevention Mechnology research" as the basis. In Xining Lin Jia ya rocks collapse hazard for the study, by analyzing the morphological and developmental characteristics of dangerous rock mass, research and analysis Tertiary mudstone engineering geological characteristics, and the destruction of dangerous rock mass collapse mechanism and movement characteristics of rockfall-depth study turn right Xining Lin Jiaya dangerous rock mass collapse risk analysis. The main contents include:(1) Through engineering geological survey, found that the main types of forest Jiaya dangerous rocks and dumping is hanging type two; forest Lin Jia ya body development is not only dangerous rock collapse and geological environment, geological structure is closely related to, or river erosion, rainfall, groundwater, weathering, human activities and other factors result of the interaction; easy to collapse tertiary formations interbedded mudstone and gypsum rock, unloading fissures, with "and Soft" easy slump dual structure; physical experiments show that dissolution of gypsum rock Yi, and mechanical strength in saturation decreased, scanning electron microscopy experiments showed that weathered gypsum rock microstructure becomes extremely loose, broken; forest Lin Jia ya rocks landslide damage can be divided into fissures development, dangerous rock mass weathering weak layers disintegration, destruction of dangerous rock mass collapse instability in three stages.(2) 3DEC dangerous rock mass collapse forest Lin Jia ya Numerical simulation results show that:First, from the bottom of the weak layer collapses, and gradually extended to the upper part of the model to monitor the displacement curve shows the upper part of the speed fell to the ground rockfall large movement distance far, resulting in the greatest threat.(3) With Rockfall Anslyst Jiaya rockfall on forest movement characteristics and hazards. Analysis found rockfall movement process can be divided into:aerial flight, speed oscillation, scroll acceleration, deceleration rolling four stages. Integrated forest Lin Jia ya region rockfall motion path, frequency, speed, energy, jump higher hazard critical information to achieve a regional landslide hazard analysis. The results showed that as the most important forest Lin Jia ya Central landslide hazard area, less than 200 meters away from the landslide scarp area is heavy disaster area, the area within 300 meters of landslide hazard areas, the proposed relocation of residents should avoid the danger zone.