大东沟泥石流勘查与治理应用

查明泥石流的地质环境条件、分布范围、规模、危害、影响因素和诱发因素等,评价与预测其稳定性,查明拟建防治工程部位工程地质条件,为下一步地质灾害治理提供依据并减小泥石流发生频率。运用地质测量地质测绘和山地工程在拟建工程部位钻孔开挖浅井和探槽综合有效的勘查方法确定地质参数。结果表明,泥石流的物源成分为安山岩,分布在形成区的主沟内和四道沟部分支沟内,危害对象为当地1100人,潜在财产损失高达9480.25万元。此外,泥石流为暴雨诱发大型低频稀性水石型沟谷泥石流,其危害性等级为中型,潜在危险性是特大型。通过对泥石流的治理,可成功保护环境,减少财产损失,促进地方的社会稳定,促进当地经济的快速发展。

This study aims to identify the geological environmental conditions,distribution range,scale,hazards,influencing and triggering factors of debris flows,evaluate and predict their stability,and determine the geological conditions of proposed prevention and control projects,in order to provide a basis for the next step of geological hazard control and reduce the frequency of debris flow occurrence.Effective exploration methods,including geological measurement,geological mapping,and mountain engineering,were used to determine the geological parameters through drilling,excavation of shallow wells,and probe trenching in the proposed project area.The results indicate that the source of debris flow is andesite,distributed in the main gully and some parts of the four gullies in the forming area,threatening 1100 local residents,and with a potential property loss of up to 94.8025 million yuan.Furthermore,the debris flow is a large-scale,low-frequency,rare water-rock type gully debris flow induced by heavy rain,with a hazard level of medium and a potential danger level of extremely high.Through the control of debris flows,the environment is protected,property losses are reduced,social stability is promoted,and the rapid economic development of the local area is accelerated.