Numerical analysis of water-bearing alluvium consolidation influence on surface subsidence
Abstract：In order to study water-bearing alluvium consolidation＇s influence on surface subsidence,the factors influencing water-bearing consolidation,including seepage factor,alluvium thickness,mining degree and mining methods were analyzed based on the importance of consolidation subsidence to determining prediction parameters.Based on analyzing field surveying datum,overburden inner displacement field and seepage field were analyzed by the method of FLAC3D fluid-mechanical interaction calculation.The influence of water-bearing alluvium consolidation on surface subsidence was researched.It is shown that when alluvium does not bear water,maximum surface subsidence is 1 220 mm.However,when alluvium bears water,maximum surface subsidence is 1 306 mm and increment is 86 mm.At the brim of subsidence basin,incremental subsidence is obvious reaching 160 mm and maximum increment percentage is 7%.Further more,for strike and dip of face horizontal movement of water-bearing alluvium was larger than that of no water-bearing alluvium.Maximum difference for strike of face was 122 mm and 105 mm for dip.
Keywords：water-bearing alluviumconsolidationmining subsidencefluid-mechanical interactionseepage
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 48-53 )