id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-9421	Luo, Jing; Liu, Jingjing; Liu, Qian	Study on Environmental Management and Ecological Restoration of Coal Mine Wasteland	2018	6	.htm	application/pdf	3344	112	37	Kumar et al. used grey constellation clustering method to divide Mentougou coal mining area into ecological restoration area, ecological maintenance area and ecological conservation area, selected three indicators of ecological damage degree, population density and per capita income, and defined the restoration mode and direction of the three areas. Saini et al. carried out ecological engineering reclamation planning and design for urban coal mining subsidence area, and designed nine reclamation zones including crop, vegetable planting area, solid waste filling reclamation and cultivation area, ecological agricultural park, deep water aquaculture area, crop reclamation area and shallow subsidence reclamation area, so as to achieve the purpose of improving economic efficiency as well as improving economic performance (Saini et al., 2016).	cache/cet-9421.htm	txt/cet-9421.txt