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新疆大学资源与环境科学学院教育部绿洲生态重点实验室
Published:2021
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[1]杨建军,汤东.露天煤矿区不同粒径土壤组分风蚀的风洞实验[J].新疆大学学报(自然科学版)(中英文),2021,38(02):213-219.
[1]杨建军,汤东.露天煤矿区不同粒径土壤组分风蚀的风洞实验[J].新疆大学学报(自然科学版)(中英文),2021,38(02):213-219. DOI: 10.13568/j.cnki.651094.651316.2020.07.30.0001.
DOI:10.13568/j.cnki.651094.651316.2020.07.30.0001.
为探讨露天采矿区人为强烈扰动作用下的土壤风蚀敏感性
本文采集了准东红沙泉煤矿区周边表层土壤并进行筛分
开展了风洞模拟实验.利用风蚀传感器测试了不同粒径土壤组分在不同风速条件下的风蚀量、风沙流结构特性
并分析了利用风蚀传感器获取的颗粒碰撞数量和能量与风蚀量的对应关系.结果表明:(1)随着风速的增加
不同土壤粒径组分的风蚀速率均显著增加
但细沙组分的风蚀速率相对较低
可能与颗粒之间的多种相互作用力有关;(2)随着高度增加
输沙量先增加而后呈指数减少
2 cm或3 cm高度处出现风蚀量峰值
4 cm之上趋于稳定;(3)随着风速增加
颗粒碰撞先增加后减小
10 m/s的风速是传感器能够感应到颗粒碰撞的临界风速;(4)风蚀传感器感应的颗粒碰撞能量与实际风蚀量拟合程度较好(R2=0.902)
实际观测中可用风蚀传感器感应的颗粒碰撞数量和能量来描述土壤风蚀量.
In order to explore the sensitivity of soil to wind erosion under strong human disturbance in openpit mining area
in this paper
the surface soil around HongShaQuan coal mine area in Zhundong is collected and screened. The wind tunnel simulation experiment is carried out. The wind erosion amount and wind sand flow structure characteristics of different particle size soil components under different wind speed conditions are analyzed by using wind erosion sensor
and the corresponding relationship between the number of particle collision and the amount of wind erosion is analyzed. The results show that:(1) with the increase of wind speed
the wind erosion rates of different soil particle size components increase significantly
but the wind erosion rates of fine sand components are relatively low
which may be related to the interaction between particles;(2) with the increase of height
the sediment transport first increases and then decreases exponentially
and the wind erosion peak appears at the height of 2 cm or 3 cm
and tends to be stable above 4 cm;(3) With the increase of wind speed
the particle collision first increases and then decreases. The wind speed of 10 m/s is the critical wind speed for the sensor to detect the particle collision. The results show that the particle collision energy induced by wind erosion sensor is well fitted with the actual wind erosion amount(R2 = 0. 902). In the actual observation
the amount of soil wind erosion can be described by the number and energy of particle collision induced by wind erosion sensor.
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