马鞍山东坡泥石流形成机理及应急防治措施

Formation Mechanism and Emergency Control Measures of Debris Flow in the East Slope of Ma'an Mountain in Anyang, Henan

"7·19"河南省安阳市连续强降雨过程中,市西南部山区马鞍山东坡出现浅层滑坡,并且沿沟谷形成了高位坡面泥石流,对下游居住有1200多户的岭头村村庄西部8户村民房屋造成了较大破坏。因上游不稳定松散堆积物源仍然存在,高位、近途、高速冲击整个岭头村的危害依然没有消除。以这次高位坡面泥石流为研究对象,分析其产生的地形地貌、岩土体特征、物源特征、降雨影响及人工影响等形成机理。提出了上游围挡、局部松散高陡岩土体卸荷,中上游疏浚坡面流水与泥石流沟,中下游设置停淤场和下游设置拦挡坝的综合应急防治措施,防治特大型泥石流地质灾害发生。

In the process of continuous heavy rain on 19th July in Anyang city, Henan Province, the east shallow landslide of Ma’an Mountain changed into the high slope debris flow along the valleys. It destroyed eight family houses in Lingtou village which has more than 1200 residents. Due to the upstream instability loose deposit, the village still faces the threat of debris flow with the characteristics of near way and high speed. Taking debris flow on slope as the research object, the formation mechanism is studied based on the research on topography, rock and soil characteristics, provenance characteristics, rainfall and the artificial influence. We put forwards to the following comprehensive management measures, enclosuring upper part, locally unloading unstable rock and soil, dredging mid-upstream, building stop and deposit field and retaining wall downstream, to prevent extra-large geological hazard.