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- W2385437709 abstract "The microstructure variety of coal roof sandstone produced from Hebi mining area under the room temperature to 1 200 ℃ high temperature has been studied by SEM, polarizing microscope, TG and DTA. The results indicate that cracks in the sandstone appears when the sandstone is heated up to 400 ℃. A few of mineral crystal particles are split and amount of the cracks increase when the temperature is up to 600 ℃. Most of the crystal particles are split and some of them sintered when the temperature is up to 900 ℃. There is organic matter in the sandstone. The releasing temperature of the organic matter is from 400 ℃ to 670 ℃. The microstructure variety of the sandstone results from thermal stress of crystal form transition and crystal volumetric expansion, and decomposition of the organic matter and migration of the decomposing products during the high temperature." @default.
- W2385437709 created "2016-06-24" @default.
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- W2385437709 date "2005-01-01" @default.
- W2385437709 modified "2023-09-25" @default.
- W2385437709 title "Study on Microstoructure of Coal Roof Sandstone Under High Temperature" @default.
- W2385437709 hasPublicationYear "2005" @default.
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