唐山市南湖采煤沉陷区地价空间规律研究

Spatial regularity of land prices in mining subsidence area of Tangshan South Lake

城市边缘采煤沉陷区不仅影响矿业城市用地扩张,而且形成独特的地价空间规律。本文基于地价样点信息野外抽样与相关资料收集的基础上,通过GIS空间分析和空间插值的方法,对唐山市南湖区采煤沉陷区内住宅用地、商业用地的地价空间规律进行了研究。由于受采煤沉陷、地质构造等影响,住宅用地、商业用地单位地价走势均沿采煤塌陷梯度方向递减,较之正常地价发生明显偏差;楼面地价表现出与单位地价相反的变化趋势。地质条件的优劣、采煤活动的强度等影响着地基承载力的大小,通过容积率、建筑限高等规划指标对地价产生影响。随着采煤活动的减弱,地价、容积率、建筑限高均呈现出以大、小南湖核心区域(塌陷中心)为中心向外围圈层递增的趋势。研究表明,采煤导致地表塌陷与积水增加了建筑成本,使地价降低;环境修复改善了居住环境质量,提高了地价;地价水平最终取决于地表塌陷损毁程度。

Coal mining subsidence area at urban edge not only affects mining urban land expansion,but also promotes to form unique spatial regularity of land prices.Based on the field samples of land prices and related data collection,through GIS spatial analysis and spatial interpolation method,this paper discusses the spatial regularity of residential and commercial land prices in coal mining subsidence area of South Lake in Tangshan city.The results show that,due to the effects of mining subsidence and geological structure etc.,residential and commercial unit land prices are diminishing along the gradient degree of mining subsidence,obviously deviating from the land price in non-subsided area,and the land price per floor area shows an inverse tendency in contrast to the unit land price.The pros and cons of geological conditions and the intensity of coal mining activities affect the bearing capacity of the ground,and besides have an impact on land prices through plot ratio and building height limit.With the weakening of coal mining activities,land price,plot ratio and building height limit are presenting a circle increasing trend from large and small South Lake core region as center to the periphery.