摘要
为了深入研究排土场坡面侵蚀过程机理,加快矿山废弃地土地复垦进程,采用传统统计学和地统计学相结合的方法,以海州露天矿排土场边坡为研究对象,利用改进的原状土水槽冲刷法,研究了排土场土石混合边坡土壤抗冲性的空间变异性特征及砾石对其影响.结果表明:砾石含量沿排土场坡面在6.55%～38.55%之间,不同坡位间差异不显著,砾石含量与土壤抗冲性之间存在一定程度的负相关关系;土壤抗冲性指数的变异系数为25.63%,属于中等变异性;土壤抗冲指数的理论模型为高斯模型,块金系数Co/(Co+C)为34.2%,在变程为16.85m内具有中等强度的空间相关性;土壤抗冲指数的空间分布表现为沿坡长方向,从坡顶到坡底脚,呈现先减小后增大的趋势,最大值位于坡顶处,最小值以"岛状"位于坡面中部.
In order to get a better understanding of the mechanism（s） for the erosion process on the slope of dumps and accelerate the reclamation process of abandoned mine land, the spatial variability characteris tics of soil anti-scourability on the soil-rock-mixture slope of the Hai Zhou op with the approaches of traditional statistics and geostatistics in combination with en pit dump were studied the improved undisturbed soil erosion flume method, and the impacts of gravel on them were investigated. The gravel content of the dump slope ranged from 6.55% to 38.55~, the difference between different slope positions was non-sig nificant statistically, and a slight negative correlation existed between gravel content and soil anti-scour ability. The soil anti-scourability showed a moderate variability, with a coefficient of variation of 25.63%. The theoretical model of its soil anti-scourability index was the Gaussian model, with a nugget factor Co/ （Co＋C） of 34.2%. Within an effective range of 16.85 m, it had a moderate spatial correlation. The spa tial distribution of soil anti-scourability index showed that along the slope length direction, from the top of slope to its bottom, it decreased first and then increased, with the maximum lying on the top of the slope, and the minimum in its middle.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第1期35-42,共8页
Journal of Southwest University(Natural Science Edition)
基金
中国煤炭工业协会科学技术研究指导性计划项目(MTKJ2011-317
MTKJ2010-310)
关键词
土壤抗冲性
空间变异性
排土场
边坡
砾石
soil anti-scourability
spatial variability
dump
slope
gravel
作者简介
吕刚（1979-），男，吉林九台人，讲师，博士研究生，主要从事水土保持与土壤物理的教学和科研工作
