Based on practical experience of coal mining beneath water bodies, unconsolidated aquifers are divided into 5 tyyes with Fuzzy theory. A suitable treatment method for each trpe of water body is given. An engineering instance is introduced Based on practical experience of coal mining beneath water bodies, unconsolidated aquifers are divided into 5 tyyes with Fuzzy theory. A suitable treatment method for each trpe of water body is given. An engineering instance is introduced