我国丘陵山区地质条件复杂，加之各种人类工程活动强烈，使得滑坡、崩塌等一系列地质灾害频发。其中，岩溶山区自然环境复杂，各类影响因素较多，因此展开典型岩溶山区的滑坡地质灾害风险评价，建立合理的评价体系尤为重要。

本研究以建始县为案例，围绕岩溶山区的地域核心问题，以县域为评价尺度，基于易发性、易损性、危险性的框架开展了研究区的滑坡地质灾害风险评价工作。研究对维护当地人民生命财产安全，促进当地经济持续发展，为其他岩溶山区的滑坡地质灾害风险评价提供指导，具有非常重大的指导意义。本研究主要取得了以下结论：

（1）研究区作为典型岩溶山区，区内的滑坡发育具有明显的地域特征，研究区内的滑坡主要为受多因素混合诱发的中小型牵引式土质滑坡。滑坡诱发外因主要表现为降雨使坡体的滑动力增加到大于滑动阻力之和时，坡体产生蠕动滑动，形成滑坡。

（2）根据区域地质灾害发育特征和典型滑坡的发生特征，确立了地形因子、地质因子、环境因子、人类活动因子四大类评价因子选择方向，并从中细分出高程、坡度、坡向、距道路距离、距水系距离、距构造距离、植被覆盖、工程岩组、土地利用类型和降雨这十个主要评价因子，分析并总结了这十个评价因子在研究区内的空间分布特征。通过聚类分级的方式，将高程、坡度、坡向等7类离散型数据转换为类别型数据，实现了评价数据的属性统一。

（3）研究区滑坡地质灾害极高风险区面积为182.73km²，占总面积的6.90％，高风险区面积为291.40km²，占总面积的11.00％，中、低风险区面积分别为476.56km²和1698.31km²，分别占总面积的17.99％和64.11％。根据这一结果构建了研究区内滑坡地质灾害管理防控措施图，并从空间上划分了搬迁避让、工程治理、专业监测、群测群防这四类滑坡地质灾害管理防控措施，为指导地区防灾减灾提供科学支撑。

The complex geological conditions in the hilly and mountainous areas of my country, coupled with the intense human engineering activities, make a series of geological disasters such as landslides and collapses occur frequently. Among them, the natural environment of karst mountainous areas is complex, and there are many influencing factors. Therefore, it is particularly important to carry out the landslide geological disaster risk assessment of typical karst mountainous areas and to establish a reasonable assessment system.

This study takes Jianshi County as a case, focusing on the regional core issues of karst mountainous areas, taking the county area as the evaluation scale, and based on the framework of susceptibility, vulnerability, and hazard. The landslide geological disaster risk assessment work. This research has very important guiding significance for maintaining the safety of local people’s lives and property, promoting the sustainable development of the local economy, and providing guidance for the risk assessment of landslide geological disasters in other karst mountainous areas. The main results of this study are:

(1) As a typical karst mountain area, the landslide development in the study area has obvious regional characteristics, and the landslide in the study area is mainly a small and medium-sized traction type soil landslide induced by multiple factors. The external cause of landslide is that when the sliding force of the slope increases to greater than the sum of sliding resistance, the slope will creep and slide, forming a landslide.

(2) According to the development characteristics of regional geological disasters and the occurrence characteristics of typical landslides, the selection directions of four kinds of evaluation factors, namely, topographic factors, geological factors, environmental factors and human activities factors, are established, and ten kinds of main evaluation factors, such as elevation, slope, et al. are subdivided, and the spatial distribution characteristics of these ten kinds of evaluation factors in the study area are analyzed and summarized. By means of clustering and grading, seven kinds of discrete data, such as elevation, slope, aspect, distance from structure, distance from water system, distance from road and rainfall, are classified, so that they can be converted into category data, and their attributes can be unified with those of other category data.

(3) The area of extremely high risk area of landslide geological disasters in the study area is 182.73km², accounting for 6.90% of the total area, the area of high risk area is 291.40km², accounting for 11.00% of the total area, the areas of medium and low risk areas are 476.56km² and 1698.31km² , respectively. They account for 17.99% and 64.11% of the total area, respectively. Based on this result, a map of landslide geological disaster management and prevention measures in the study area was constructed. The map spatially divides four types of landslide geological disaster management and prevention measures, namely relocation and avoidance, engineering governance, professional monitoring, and group measurement and group prevention. And provide scientific support for guiding regional disaster prevention and mitigation.