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Engineering Geological Features of Wall Rock and Quality Assessment of Underground Opening Workings in the Laochang,  Pb-Zn Deposit, Lancang,Sichuan Province 
详细信息   
摘要

///At present, geomechanical classification is a common method for the classification of wall rock in engineering geology.  This method is based on five parameters such as strength of complete rock, quality index(RQD) of rock, joint space, joint state and groundwater conditions.  This paper uses this method for assessing the quality of underground opening workings in the Laochang Pb-Zn deposit, Lancang. 

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