Study on the Ecological Restoration and Comprehensive Rehabilitation of Degraded Land in Coal Mining Areas-A Case of a Mining Land in Henan Province
Land subsidence and ecological damage caused by underground mining threaten seriously the sustainable development of mining areas. An example of coal mining areas in the middle of Henan province is studied. The subsided areas amount to 21.8 km2 and the maximum subsided depth is 4.9 m. In which, the ponding areas amount to 2.5 km2 and its maximum water depth of 1.2 m. A series of serious problems, such as inundation, salinization, soil erosion and soil fertility declining are caused by land subsidence. Meanwhile, the waste minerals, weathered and leached by rainfall, emit large amounts of toxic and hazardous substances and pollute the soil, water and atmosphere. Land subsidence in different areas, which is simply differed as hilly areas and plain areas, takes different rehabilitation techniques. Subsided lands in hilly areas are built as types of terrace and little slopes. And subsided lands in the plain are rehabilitated with techniques, such as drainage, filling with waste rocks or fly ashes, deepening lower subsidence and filling higher subsidence. And also the soil quality improved by planting peanuts, soybean and other legume perennial or annual herbs, and adding organic fertilizer and so on. At the same time, with the comprehensive utilization of waste rock and greening the waste dump, ecological environment in the coal mining areas is remarkably amended.
coal mining areas degraded land ecological restoration comprehensive rehabilitation
Wang Rui Li Ruihua Li Lixia
Henan Polytechnic University,Jiaozuo, Henan 454000 Agro-Environment Protection Station of Shandong Province, Jinan Shandong, 250100
国际会议
西安
英文
427-430
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）