From analyses of rock and coal composition, texture, structure and fossil character, revealed that in the minefield has paleochannel passed through.

通过对岩煤层成分、结构、构造及所含化石特征分析，揭示出井田内发育有古河流地质构造。

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Attenuation of elastic wave amplitude in rock is affected by its temperature and pressure, filled fluid properties, fluid saturation, rock composition and structure, etc.

弹性波振幅在岩石中的衰减程度受其温压、所含流体性质、流体饱和度、岩石组分、结构等因素的影响。

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The classification of rock group for the deep and thick overlying layer could be based on their formation, matter composition, structure features and the thickness changes.

深厚覆盖层可按其成因、物质组成、结构特征及厚度变化等作为岩组划分的依据。

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