矿山泥石流沟谷形态的分形分维  

Fractal analysis on morphology of mine debris flow gully

作　　者：李建林[1] 张洪云[1] 李振林[2,3] 

机构地区：[1]河南理工大学资源环境学院,河南焦作454003 [2]甘肃省测绘局 [3]甘肃省基础地理信息中心,甘肃兰州730000

出　　处：《中国地质灾害与防治学报》2012年第1期1-5,共5页The Chinese Journal of Geological Hazard and Control

基　　金：国家自然科学基金(41101025);河南省重点攻关项目(102102310354);河南理工大学博士基金(B2009-28)

摘　　要：以2个区域的矿山泥石流为背景,利用分形理论分析了矿山泥石流沟谷形态特征,并与4个区域的自然泥石流沟谷形态进行比较研究。沟谷形态的分形维数具有相同的地学意义:维数越小,该要素对沟道及泥石流的发育和形成的影响越大。沟道比降、汇水面积和沟道长度3个沟谷形态要素中,汇水面积影响最为显著;但矿山泥石流沟谷具有汇水面积少、沟谷尺度小,沟谷比降陡的特点;在此基础上提出了自然—矿山型泥石流的概念。Using fractal theory,we analyzed the distribution characteristic and morphology of mine debris flow gullies based on data of mine debris flow in two regions,and compared mine debris flow gullies with natural debris flow gullies in four regions.We find that（1） Fractal dimensions of debris flow gullies have clear meaning,that is,the smaller fractal dimensions,the greater impact to the formation and development of debris flow gullies.（2） The fractal dimensions of the catchment area,slope and length of debris flow gullies are different.Among them,the fractal dimensions of the catchment area is least,that is,the catchment area brings the most significant influence to the both formation and development of debris flow gullies.（3） Based on the analysis above,we put forward a new concept：nature-mine debris flow.

关 键 词：矿山泥石流 沟谷形态 分维 自然—矿山型泥石流 

分 类 号：P642.23[天文地球—工程地质学]