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| STUDY ON ROCK MASS STRUCTURE AND MECHANIC PROPERTY OF BASALT |
| Wang Yi，Yang Jianhong |
| (Chengdu Exploration and Design Institute，NPC，Chengdu 610072 China) |
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Abstract E′mei Mountain basalt is a common kind of rock in southwest china and often found in hydropower engineering construction. The rock mass texture and engineering property are obviously influenced by the primary formation，tectonism，weathering and unloading of basalt. Bedding structure and bedding joint formed in rock formation are the basis of inter-formational and intra-formational shear fractures. Joints affect the integrity and structure of rock masses. The effects of joints on the rock mass mechanical properties can be shown by in-situ tests. The inter-fomational and intra-formational shear fractures govern framework structure and engineering property of rock masses，and consist of the major geological boundaries in many engineering geological problems. Their influences on the mechanical properties of engineering rock masses are shown in structure effect and mechanic parameters by quality classification of rock masses and loading analysis.
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DONG Jiaxing1, LIU Mengfei1, MI Jian2, WANG Yixian3, JIN Kesheng1, DAI Peixuan1, LIU Xiaoning2, ZHAO Yiran2, QI Yongli4. Precise characterization of geometric parameters of structural planes and engineering geological evaluation of surrounding rock in sandy dolomite tunnel[J]. , 2025, 44(9): 2292-2304. |
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2002, Vol. 21 
