半干旱区采煤塌陷对风蚀影响强度模糊综合评判——以神府-东胜煤田补连塔矿风沙区为例

以神府-东胜煤田补连塔矿风沙区为例,通过野外系统观测,以采煤塌陷后1～4 a的塌陷区和对照(非塌陷区)风蚀侵蚀性因子、塌陷地表土壤特征等因素为参评因子,在各因子等级指标划分的基础上,利用模糊数学理论,建立神府-东胜煤田补连塔矿风沙区风蚀强度评价模型。通过该模型运算,结果表明:2005年塌陷区样地(塌陷1 a)风蚀评判综合指数为0.94,属极重度风蚀区;2004年塌陷区样地(塌陷2 a)综合指数为0.7322,属重度风蚀区;2003年塌陷区(塌陷3 a)和2002年塌陷区(塌陷4 a)综合指数分别为0.3881和0.2373,为中度风蚀区;对照 (非塌陷区)样地其综合指数为0.0088,属轻度风蚀区。模型运算结果符合实际,说明以模糊数学理论为基础建立的风蚀强度评价模型可靠、可行,可用于指导实践。

Fuzzy Assessment on Wind Erosion of Subsidence Area Induced by Coal Mining in Semi-arid Area: A case study in Bulianta Mine area of Shenfu-Dongsheng Coalfield

Systematic field observation about soil wind erosion was conducted in the Bulianta Coal Mine area of Shengfu-Dongsheng coalfield. A evaluation model on wind erosion intensity was established based on the fuzzy mathematic theory. The evaluation indices are comprised of wind erosion factors and surface soil features on areas 1～4 years after subsidence, with no subsidence area as check. Fuzzy assessment results showed that the comprehensive index of wind erosion assessment was 0.94 in area one year after subsidence, being the very severe wind erosion degree;0.7322 in area two years after subsidence, being the severe wind erosion degree;0.3881 in area three years and 0.2373 in area four years after subsidence, belong to medium degree. The comprehensive index of wind erosion assessment was 0.0088 in check area, being light wind erosion degree. The simulation results are in accordance with the actual, which proved that the model is reliable and feasible, and can be used to guide practice.