该文从地质构造及地层岩性两方面，分析了西藏某矿山泥石流物源颗粒的组成及形成背景。根据矿区泥石流发育特征，计算得到泥石流容重、流速、流量及一次输移量等参数。以N2泥石流为例，经分析，N2区域泥石流的规模较小、中等发育、处于发展期，并对该处拟建排土场的潜在风险进行评价，提出了解决建议。

This paper analyzes the composition and formation background of debris flow source materials in a mining area in Tibet from the perspectives of geological structure and stratigraphic lithology. Based on the development characteristics of debris flow in the mining area, key parameters such as unit weight, velocity, discharge, and single transport volume of the debris flow is calculated. Taking the N2 debris flow as an example, the analysis indicates that the debris flow in the N2 area is small in scale, moderately developed, and currently in a developmental stage. The study also evaluates the potential risks posed to the proposed waste disposal site in the area and offers corresponding mitigation suggestions.