ABSTRACT
In order to research the effect of mining subsidence on soil physical and chemical properties, the subsidence areas of Da Liuta mining district were divided into pelvic floor area and marginal area. The results showed that:1) The influence of mining subsidence on soil physical properties had obvious zoning characteristics, the influence on marginal zone was greater than pelvic floor area. Soil moisture content, bulk density, porosity in pelvic area showed a self-recovery phenomenon 1a after mining, while not in marginal area. The influence of mining subsidence on physical properties of topsoil were higher than those of deep soil. 2) The influence of mining subsidence on soil chemical properties was relative slight and had partition feature, the influence on marginal zone was greater than pelvic floor area. Mining subsidence reduced the content of soil total nitrogen and available potassium, but had no effect on soil available phosphorus or organic matter.
