摘要
采用野外放水冲刷实验,对神府东胜煤田弃土弃渣侵蚀产沙规律进行了系统研究。结果表明:弃土弃渣堆积年限越短,可蚀性越大,侵蚀程度越强。经过4～7年的自然沉降过程,其表面的紧实度逐渐趋于稳定值。流量相同时不同下垫面条件下的产沙量1997年弃渣>1994年弃渣>煤渣>煤矸石。径流量、产沙量与放水流量呈线性关系,产沙量与径流量亦呈线性关系。集中的水流冲刷对弃土弃渣坡面造成严重的侵蚀,使含沙量保持在一个较高的水平,随着时间的变化含沙量出现剧烈的上下波动,总体上表现出逐渐减小的趋势,同时,会出现高含沙水流过程甚至泥石流过程。
Field Scouring Experiment on the residues of shenfu dongdheng coalfield during exploitation was con-
ducted with the method of simulate overland flow. Results showed that the shorter deposits time of the residues
characterized the larger erodibility due to the gradually stable compaction after 4 to 7 years natural deposit process.
Sediment load decreased with the order of residues of 1997 , residues of 1994, coal and gangue under the same
overland flow. Moreover, linear relation lies in runoff, sediment and overland flow. Sediment concentration in
mining-site residues kept a high level and turned irregularly with time, which revealed high erosion potential in
these sites. It decreased and approached to a constant in the last. In addition , debris flow goes with the runoff and
sediment processes.
出处
《水土保持学报》
CSCD
北大核心
2004年第5期68-71,共4页
Journal of Soil and Water Conservation
基金
黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-126)
中国科学院知识创新工程项目(KZCX1-10-04)
中国科学院知识创新工程重要方向(KZCX3-SW-442)
中科院水保所领域前沿专项(C23013200)和陕西省科学院择优专项支持项目(B22055200)联合资助
