新疆地区煤矿复垦为草地适宜性评价模型的建立及应用

Establishment and application of the suitability evaluation model for reclamation of grassland of Xinjiang coal mine

本文结合新疆地域特点,在合理确定土地复垦适宜性评价指标体系的基础上建立了新疆地区煤矿土地复垦为草地的适宜性评价模型。以新疆12处煤矿为研究背景,选取了待土地复垦单元土地损毁后的地面坡度、损毁土地深度或压占区堆积物平整量、复垦土源保证率、土地损毁造成土地产量的降低、地面塌陷或挖损后地下潜水位埋深、土壤中粘粒含量、覆土厚度、矿区可供灌溉水量和土壤有机质含量等9项因素作为评价因子,以12处煤矿的55个土地复垦单元作为学习样本,建立了相应的土地复垦适宜性评价模型,采用回代估计方法对学习样本逐一进行检验,正确率达98.2%,将该评价模型应用到伊犁一号煤矿矿井,对该煤矿的16个待土地复垦单元进行分析评价,评价结果理想,该评价模型可广泛应用于新疆地区煤矿土地复垦适宜性评价工作中。

This paper combined with the Xinjiang regional characteristics to establish the suitability evaluation model for reclamation of grassland for Xinjiang coal mine on the basis of reasonable index system of suitability evaluation for land reclamation.Taking 12 coal mines in Xinjiang as the research background,the author selected 9factors such as the slope of land reclamation unit after land destruction,the depth of land destruction or the amount of deposit of land occupancy,the guaranteed rate of soil for land reclamation,the reduced production of land by land destruction,the groundwater depth after land excavation or subsidence,groundwater depth the clay content in the soil,the thickness of topsoil,water for irrigation of mining area,the content of organic matter in soil as analyzing indexes.The suitability evaluation model for land reclamation of coal mines in Xinjiang was established by taking the 55 land reclamation units of 12 coal mines in Xinjiang as the training samples.Every sample was tested by using resubstitution methodaccording,and the correct rate was equal to 98.2%.The evaluation model was applied to Yili No.1Coal Mine and the evaluation results was ideal.The evaluation model can be widely used in suitability evaluation for land reclamation of coal mine in Xinjiang.