霍东矿区煤炭资源开采对土壤质量的影响

Effect of coal resources mining on soil quality evaluation in Huodong mining area

以霍东矿区某煤矿为例,在沉陷区取30组土壤试样进行土壤化学性质及常量养分分析,然后采用层次分析法对沉陷区土壤质量进行评价,得到沉陷区耕地质量综合指数,然后通过与正常农田综合指数对比发现地裂缝和地面塌陷对耕地质量影响很大,大部分农田处于“轻度损坏”,局部为“中度损坏”,建议进行填埋复垦和生态修复。

Mining of coal resources will cause a lot of geological environment problems,such as the formation of goaf in underground mining leads to surface deformation,formation of ground collapse cracks,further decrease in soil quality in nearby farmland.Taking a coal mine in Huodong mining area as an example,soil chemical properties and constant nutrients of 30 groups of soil samples were analyzed in the subsidence area,then the soil quality of subsidence area was evaluated by the analytic hierarchy process(AHP),and the comprehensive index of cultivated land quality in the subsidence area was obtained.What’s more,ground fissures and ground collapse were found to have great influence on quality of cultivated land by comparing with normal farmland comprehensive index.It is concluded that most of the farmland are in"slight damage",part of the farmland are"moderate damage"and landfill reclamation and ecological restoration are recommended in the subsidence area.