某堆积体位于西藏昌都地区,下覆基岩岩性不同,堆积体松散破碎,稳定性较差。根据该堆积体的环境特征,结合该地区河流演化历史分析该堆积体的成因机制,找到影响该堆积体形成的各种内外因素。在西藏地区特有的地质环境条件下,河谷不断的深部切割、两侧拓宽,堆积体的形成是必然的。 Some of the deposits are located in the Changdu area of ​​Tibet. The lithologies of the underlying bedrock are different, and the deposits are loose and fragmented, resulting in poor stability. According to the environmental characteristics of the deposit and the history of the river evolution in the area, the genesis mechanism of the deposit is analyzed to find various internal and external factors that affect the formation of the deposit. Under the special geological environment in Tibet, continuous valley deep cutting, widening on both sides, and the formation of sedimentary bodies are inevitable.