一种用于岩石材料微裂纹观察的复型技术

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Abstract A special surface replica technique for microcrack observation of rocks is introduced. The replica，which is hard，thick and semi-transparent，is convenient to be used for observation and analysis under optical microscope and SEM (Scanning Electron Microscope). By using this technique，cracks wider than 0.2 m and the microstructural natures of minerals can be satisfactorily copied for the microscopical investigation. The noticeable characteristic of this replica attributes to its capacity of distinguishing the minerals on the rock surface. Application of this technique in the study on failure behavior of different minerals in granite shows that this is an effective and convenient method for the study of microcracking in rocks，especially for the study of cracking behaviors of different minerals and their relations with the failure of the rocks.

Key words： replica technique microcrack observation mineral failure rock

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