论文部分内容阅读
对堆积物的粒度进行分析,可以为研究火山泥石流的形成机制、数值模拟等提供参考数据。为了对长白山天池火山泥石流堆积物进行研究,在二道白河镇附近对长白山天池的古火山泥石流进行了勘察,取了2组共12个火山泥石流堆积物样品。对第1组进行了粒度参数法分析,得到了火山泥石流堆积物的平均粒径、分选系数、偏度和峰度,认为长白山天池火山泥石流堆积物的分选较差,沉积以粗组分为主。基于从第2组6个样品的分析可以推断,长白山天池火山泥石流主要为稀性泥石流,泥石流堆积物粒度分布较不均匀,分选较差,粒度分布接近正态分布。研究表明,粒度参数分析和结构维数计算相结合可以很好地了解火山泥石流堆积物的分选性、粒度分布情况、泥石流的类型等。
Analyzing the grain size of the deposit can provide reference data for studying the formation mechanism and numerical simulation of volcanic debris flow. In order to study the volcanic debris flow deposits in Changbaishan Tianchi volcano, the volcanic debris flow of the ancient volcano in Tianchi of Changbai Mountain was investigated near Erdaobaihe Town, and a total of 12 samples of volcanic debris flow deposits were taken. The first group was analyzed by particle size parameter method, and the average particle size, sorting coefficient, skewness and kurtosis of the volcanic debris flow deposits were obtained. It was considered that the volcanic debris flow deposits in Changbaishan Lake were poorly sorted, Mainly. Based on the analysis of six samples in the second group, it can be inferred that the volcanic debris flow in Changbaishan Tianchi volcano is mainly a dilute debris flow, the particle size distribution is not uniform, the sorting is poor, and the particle size distribution is close to the normal distribution. The research shows that the combination of particle size analysis and structural dimension calculation can well understand the characteristics of volcanic debris flow sediment sorting, particle size distribution, debris flow type and so on.