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- W2359978035 abstract "According to the damage characteristics of coal and rock,the damage variable of coal and rock structures was defined,the corresponding elastoplastic damage constitutive equation was established,and the secondary development of the finite element program was completed.The example of Wulan coal mine with double protective seam mining was calculated and analyzed by this new program,and the change laws of damage degree and permeability coefficient in protected coal seams were given.The results show that the tension damage appear in protected coal seams 2 and 3,the stress of coal seams are released clearly,and the permeability of coal seams quickly increases after the protective seams 7 and 8 mined.These results are beneficial for gas migration and extraction in coal seams,which is consistent with engineering practice." @default.
- W2359978035 created "2016-06-24" @default.
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- W2359978035 date "2011-01-01" @default.
- W2359978035 modified "2023-09-23" @default.
- W2359978035 title "Research on the coal and rock damage and gas permeability in the protective seams mining" @default.
- W2359978035 hasPublicationYear "2011" @default.
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