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- W2372484182 abstract "In order to have a safety and high efficient mining in the outburst seam,the paper had a study on the protected seam mining in the ultra thin seam steadily becoming an important research program of the coal and gas prevention and control in China.Base on the geological conditions of No.11011 working face in Cuimiao Mine of Zhengzhou Coal Mining Group as the engineering background,the numerical simulation study method was applied to study the stress variation law,subsidence displacement law and the swelling deformation variation law of the overlying 21 seam during the underneath protective seam borehole mining.The study showed that with the advancing of the protective seam,the deformation of the protected seam would have the variation law from the compression,rapid swelling,swelling deformation reduced to stabilized.The geometric features of the swelling variation at a point of the protective scope would be S shape.The numerical analysis results and the site experiment results would be basically fitted." @default.
- W2372484182 created "2016-06-24" @default.
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- W2372484182 date "2011-01-01" @default.
- W2372484182 modified "2023-09-24" @default.
- W2372484182 title "Numerical analysis on overlying coal seam variation with borehole mining at underlying protected seam" @default.
- W2372484182 hasPublicationYear "2011" @default.
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