Influence of ground fissures on deep soil moisture content in coal mining subsidence area
In order to explore the influence of ground fissures on the moisture content of deep soil,a coal mining area located in a coal base in northern Shaanxi was taken as the research object.Statistical analysis methods were used to analyze the influence of dynamic ground fissures and marginal ground fissures on shallow(0.1-0.3 m)and deep(0.5-6.0 m)soil moisture content,and the temporal and spatial variation law of soil moisture content was analyzed based on the Kriging interpolation method.The results showed that:①In the vertical direction,when the depth was 0-2.0 m,the soil moisture content in the dynamic and marginal ground fissure areas was lower than that in the undisturbed area.When the depth was 2.0-6.0 m,there was no signifi-cant difference in soil moisture content among different areas,indicating that the influence of ground fissures on soil moisture content was about 0-2.0 m deep.The influence of ground fissures on the moisture content of shallow soil was greater,and the influence on deeper the moisture content of deeper soil was relatively smaller.②In the horizontal direction,the overall soil moisture content in the dynamic ground fissure area was lower than that in the closed area,while the soil moisture content in the 1-year marginal fissure area was higher than that in the 2-year edge fissure area,indicating that ground fissures have a signifi-cant impact on the spatial distribution of soil moisture.Overall,surface subsidence and the appearance of ground fissures have changed the structural state of soil,accelerated the evaporation of soil moisture,and reduced soil water holding capacity.
万方数据
维普
