超高应力作用下锦屏二级水电站深部岩体变形特性试验研究

doi:10.13722/j.cnki.jrme.2014.1274

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Abstract The maximum burial depth of rock mass is about 2 500 m in Jinping II hydropower station diversion line，deformation test is carried out for studying the deep rock mechanical property under the pressure of 100 MPa. The rigid bearing plate for center-hole method is employed，deformation property of deep rock mass is analyzed under the ultra-high pressure，these are relationship between deformation modulus and the burial depth，anisotropic feature，the deformation feature while the test pressure is greater and less than the initial geostress. (1) Rock mass deformation modulus is related to the burial depth，deformation modulus is remarkably improved with the increase of depth. (2) Anisotropic feature is manifested in different burial depth. (3) The rock mass is carrying on rebound test when the test pressure is less than the initial geostress，the ratio of elastic deformation to total deformation is relatively larger，elastic deformation is less when the test pressure is larger than the initial geostress. (4) The compression deformation in the depth of 0.5–1.0 m is the maximal，and the degree of damage of rock mass is more serious. Research results provide the basis for the further study of rock mass deformation property and stability analysis of deep underground cavern.

Key words： rock mechanics deep rock mass rigid bearing plate centric hole method ultra-high pressure deformation characteristics Jinping II hydropower station

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	CHEN Wenhua
	HUANG Huolin
	MA Peng

Cite this article:

CHEN Wenhua,HUANG Huolin,MA Peng. TEST STUDY OF DEFORMATION CHARACTERISTICS OF DEEP ROCK MASS IN JINPING II HYDROPOWER STATION UNDER ULTRA-HIGH PRESSURE[J]. , 2015, 34(S2): 3930-3935.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1274 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/3930

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