煤矿区井采土地复垦成本评价指标体系构建

以煤矿区井采为研究对象,建立了以自然环境条件、采矿条件、煤矿赋存条件3项为约束层,地形坡度、土地利用规划、煤层厚度等11个影响因子构成指标层的土地复垦成本评价指标体系,采用德尔菲法、层次分析法及YAAHP(V 6.0)软件确定了各项指标因子的权重。通过权重比较得出约束层的影响程度:煤矿赋存条件> 采矿条件> 自然环境条件,煤矿赋存条件中影响程度依次是:煤层厚度> 煤层倾角> 深厚比;采矿条件中各因子影响程度依次为:顶板管理方法> 采煤工艺> 采动程度;在自然环境条件下,土地利用规划> 有效土层厚度> 年降水量=土壤质地> 地形坡度。该评价指标体系的完善,为煤矿井采复垦成本修正系数的确定奠定基础。

Evaluation Index System Construction of Reclamation Cost for Coal Mine Land Destroyed by Underground Mining

In the improved index system, underground coal mining is chosen as the research object. Such conditions as natural environment, mining and coal mine occurrence constitute the constrained layer and eleven impact factors, such as terrain slope, land exploitation planning and coal seam thickness, constitute the index layer. Delphi and analytic hierarchy process (AHP) methods and YAAHP(V6.0)software are employed to determine the weight of each index. The weight comparison shows that in order of decreasing weight, the three compared conditions are the coal mine occurrence, mining and natural environment; the coal mine occurrence conditions are the coal seam thickness, dip angle of coal seam and ratio of crack depth; the mining conditions are the roof management method, coal mining technology and mining degree; and the natural environment conditions are the land exploitation planning, effective thickness of soil layer, precipitation, soil texture and slope of the terrain. The improved index system lays a foundation for determining the modified coefficient of the reclamation cost for the land destroyed by underground coal mining.