基于固相沉积法的大型排土场暴雨泥石流流动特性预测研究——以四川某矿山泥石流为例

The Prediction of Raintorm Debris Flows Characteristics about Large Dump Based on Solid Sedimentary Analysis——Take the Mine Debris Flow in Sichuan as an Example

泥石流作为矿山常见的地质灾害,已经成为危害人类最重要的地质灾害之一,但目前对大型排土场暴雨泥石流的流动特性和灾害预测研究相比崩塌、滑坡及洪水相对较弱。以四川某矿山排土场暴雨形成的泥石流为例,提出了固相沉积分析法,并对矿山排土场暴雨泥石流流动特性进行预测分析,研究了稀性、低黏度泥石流固相沉积规律,对泥石流密度、流速、固相流量、总流量等进行计算,深入探析了泥石流形成后随沟道变缓等因素衰减演变成山洪的过程。研究成果对泥石流的预测和防治有重要的现实指导作用。

The debris flow as a common geological hazard has become one of the most harm geological hazards to human. At present people＇s understanding degree to the research on debris flow is relatively weaker than the study about collapse, landslide and flood. This paper takes a mine debris flow as an example based on solid sedimentary analysis, predicting the flow- ing characteristics of rainstorm debris flow of large dump, studying the dilute resistance and solid sedimentary law of the low viscosity debris flow. We have used the solid deposition analysis method to calculate the weight of debris flow, velocity, solid flow and total flow rate. Analysis on the process of the debris flow which evolved into a torrent due to some unfavorable factors ~ attenuation such as channel has gotten slowly. The research results have important and practical guiding effect about prediction and prevention of debris flow.