采煤塌陷地不同充填介质水力特性对比研究  

The comparative study of hydraulic characteristics under different filling medium on coal mining subsided land

作　　者：秦倩[1] 王金满[1,2] 王洪丹[1] 李新凤[1] 祝宇成[1] 

机构地区：[1]中国地质大学土地科学技术学院,北京市海淀区100083 [2]国土资源部土地整治重点实验室,北京市海淀区100035

出　　处：《中国煤炭》2015年第2期114-119,共6页China Coal

基　　金：国家十二五科技支撑计划课题(2011BAD04B03)

摘　　要：为了分析采煤塌陷地充填复垦对土壤和充填介质水分运动的影响,对土壤、粉煤灰、煤矸石、粉煤灰—煤矸石混合物4种充填物的水力特性进行了对比分析。经研究发现,粉煤灰的持水能力最强,煤矸石最差,粉煤灰-煤矸石混合物及土壤居中;煤矸石的水分扩散性能最佳,粉煤灰-煤矸石混合物和土壤次之,粉煤灰的水分扩散性能较差;粉煤灰—煤矸石混合充填物具有与土壤较为一致的水力特性。为了保证复垦土壤的持水能力和透气性,应选择用粉煤灰—煤矸石混合充填复垦模式。Aiming at analysis of the influence on the water movement of soil and filling medi-um caused by subsidece through reclamation, the authors analyzed and compared hydraulic char-acteristics of four kinds of fillings, the soil, fly ash, coal gangue and fly ash coal gangue mixture.The hydraulic characteristic curves were measured by centrifuge and fitted by Van Genuchtenmodel. The research showed that the water-holding capacity of fly ash was the best, the coalgangue was the worst and the fly ash coal gangue mixture and soil were in the middle; the waterdiffusivity of coal gangue was the biggest, following was the mixture of fly ash and coal gangue,soil was in third and the last was fly ash; the hydraulic characteristics of fly ash and coal ganguefilling were consistent with the soil. In order to ensure the water-holding capacity and the permea-bility of the reclaimed soil, fly ash and coal gangue mixture reclamation filling pattern should hechosen.

关 键 词：采煤塌陷地 水分扩散率 饱和含水率 土壤水分特征曲线 充填复垦 

分 类 号：TD88[矿业工程—矿山开采]