水土保持通报2026，Vol.46Issue(2)：76-85,10.DOI:10.13961/j.cnki.stbctb.2026.02.024
植被毯覆盖对高寒矿区煤矸石基质热性质的影响
Influence of vegetation blanket coverage on thermal properties of coal gangue substrate in alpine mining areas
摘要
Abstract
[Objective]The influence of different vegetation blankets(common anti-erosion blanket,straw vegetation blanket,coconut fiber vegetation blanket,and straw-coconut fiber mixed blanket)on the thermal characteristics of coal gangue substrate in alpine mining areas was evaluated,and the insulation protection system of frozen soil in mining areas was reconstructed,in order to provide a scientific basis for ecological restoration in alpine mining areas.[Methods]Using the natural peat layer and uncovered coal gangue as controls,four common vegetation blankets covering the coal gangue substrate were selected.The thermal conductivity,thermal capacity,and thermal diffusivity of different covering materials were measured through thermal property experiments,and their insulation performance was then comprehensively evaluated by combining the entropy weight TOPSIS method.[Results]① Within the water content range of 0.1 to 0.3,the thermal parameters of the peat layer and coal gangue matrix exhibited different variations as the water content increased.Among them,thermal capacity was the most sensitive to changes in water content,followed by thermal conductivity,while thermal diffusivity fluctuated greatly under the influence of both factors.② The laboratory soil column experiment showed that the thermal conductivity[0.61 W/(m ∙ K)],thermal capacity[1.60×10 ⁶ J/(m3 ∙ K)],and thermal diffusivity(3.90×10 ⁻7 m2/s)of the peat layer were all at their optimal values.Compared with uncovered coal gangue,vegetation blankets significantly improved the thermal properties,among which the straw vegetation blanket performed the best,reducing the thermal conductivity to 0.65 W/(m∙K),increasing the thermal capacity to 1.16×10⁶ J/(m3 ∙ K),and reducing the thermal diffusivity to 5.50×10⁻7 m2/s.③ The entropy weight TOPSIS analysis showed that the straw vegetation blanket had the highest relative proximity(0.603)and was the optimal coverage solution for alpine mining areas.[Conclusion]The straw vegetation blanket can effectively simulate the heat insulation function of the peat layer,significantly reduces the thermal conductivity of the coal gangue substrate,and increases its thermal capacity.It can be used as the best material for reconstructing the insulation layer of frozen soil in alpine mining areas.关键词
煤矸石/植被毯/热性质/土柱试验/熵权TOPSIS法Key words
coal gangue/vegetation blanket/thermal properties/soil column experiment/entropy weight TOPSIS method分类
农业科技引用本文复制引用
李川,贺康宁,马小东,邹星晨,王作枭..植被毯覆盖对高寒矿区煤矸石基质热性质的影响[J].水土保持通报,2026,46(2):76-85,10.基金项目
"十四五"国家重点研发项目"高寒矿区水源涵养功能恢复新型材料和冻土剖面近自然重构技术研发与试验示范"(2022YFF1302604) （2022YFF1302604）
