关键词: 深层土壤水分, 土壤容重, 孔隙度, 采煤沉陷, 时空变化

Abstract: In view of the lack of research on the spatiotemporal changes of deep soil bulk density, porosity and water content, based on the measured data of coal mining subsidence area of nalinhe No. 2 mine in Yushenfu mining area, the temporal and spatial changes of soil moisture content, soil bulk density and porosity at 0-10m depth are studied. The results show that with the increase of the formation time of coal mining subsidence area, the soil bulk density gradually decreases, the porosity gradually increases, and the soil moisture content recovers. In terms of spatial distribution, the soil bulk density in the tensile area is lower than that in the basin bottom area, and the soil porosity is higher than that in the basin bottom area, indicating that the influence of coal mining subsidence on the surface structure in the tensile area is more obvious and lasting; The change of soil moisture content in the stretching area is less than that in the basin bottom area. The 0-2m soil moisture content in the depth direction is mainly affected by coal mining ground fissures, and the 6-10m soil moisture content is mainly affected by the change of groundwater. The middle is a transition zone, and the soil moisture content is relatively stable.