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黄土崩塌是延安地区频发和广布的一种崩塌地质灾害类型,考虑赋存的自然与地质环境条件,以及人类工程活动的影响,将延安地区黄土崩塌分为水分浸湿型、盐蚀型、工程开挖型和窑洞型等4类,进而通过对延安地区地质灾害详细调查涉及的356处黄土崩塌的成果资料进行统计,采用贡献率法研究延安地区不同黄土崩塌类型与黄土崩塌的相关性。结果表明,工程开挖型和窑洞型对黄土崩塌的贡献率程度最高,盐蚀型对黄土崩塌的贡献率程度中等,水分浸湿型对黄土崩塌的贡献率程度最低。分析结果反映了延安地区黄土崩塌发育的实际情况,可供在黄土高原其他地区防灾减灾研究中参考应用。
Loess collapse is a frequent and widespread type of collapses in Yan’an. Considering the occurrence of natural and geological conditions and the impact of human engineering activities, the loess collapse in Yanan area is divided into wet-type and salt-wet type , Engineering excavation and cave-dwelling type. Based on the statistical data of 356 landslides involved in a detailed investigation of geological disasters in Yan’an area, the contribution rate method was used to study the correlation between different types of loess collapse and loess collapse in Yan’an . The results show that the excavation type and cave type have the highest contribution to the loess collapse, the salt contribution type has the same contribution to the loess collapse, and the moisture wet type has the lowest contribution to the loess collapse. The analysis results reflect the actual situation of the loess collapse in Yan’an, which can be used for reference in the research of disaster prevention and reduction in other parts of the Loess Plateau.