The Extention Of Geologal Disasters Of Landslide Risk Assessment And Management Research In The Yanchang County

Plateau broken because of the terrain, a fragile ecological environment, the complexity of the geological environment, landslides and other geological disasters development of local industrial endanger agricultural production and people's lives . Extension of the eastern part of the county is located in Yan'an, a serious geological disasters. In 2007, my mentor teacher Chen assumed CGS issued China's Shanxi Province to extend the County of Yan'an City, a detailed investigation of geological disasters in the research, in assisting the instructor after completion of the project, to further their own county landslide hazard risk assessment carried out. Screened from the focus of 20 pairs of people's lives and property caused by the threat of landslides will be carried out analysis and risk assessment to determine the risk of landslides, a landslide risk management program.By extending the county's comprehensive analysis of loess landslides, summed up the county's development of loess landslide features, analysis of the resulting necessary conditions and influencing factors.Focus on the slide 20, respectively, using numerical analysis method, limit equilibrium method and engineering geological analogy to the stability analysis and evaluation, results showed that in 20 landslide, stability and a more stable 15, accounting for 75%, unstable The five, accounting for 25%.In the stability analysis of the landslide body and the potential for disaster loss based on the analysis of the first 20 months of the study carried out the danger of landslides qualitative assessment, in which high-risk disaster point five, accounting for 25 percent of the total number of dangerous middle of the disaster of 11 points, accounting for 55% of the total, the risk of disaster a small 4 point, accounting for 20% of the total.Combination of local conditions and past experience, points to the landslide disaster preparedness for the potential loss of life, body, and an analysis of the potential loss of property assessment, the probability of draw vulnerability.Points on the landslide risk assessment, risk assessment in accordance with established standards, a 20 landslide risk assessment: the potential losses in casualties, the high-risk-free, two middle-risk, low-risk 18; of the potential risks of damage to property, 2 high-risk, medium risk of 6,12 low-risk.The final point of the landslide hazard risk management, according to "people first" principle, combined with the size of landslide risk, a relocation, engineering, management and monitoring plan for the prevention and treatment. The above study is the evaluation of landslide stability conditions and the deepening of research, the results of landslide hazard for the extension of the county with reference to the value of prevention and treatment.