DENG Qing, ZHAO Qihua, PENG Sheqin, CHEN Jibin. 2017: DEEP UNLOADING FISSURE AND NON-HOMOGENEITY OF ROCK MASS USING ROCK DISCONTINUITY NETWORK SIMULATION. JOURNAL OF ENGINEERING GEOLOGY, 25(4): 993-1000. DOI: 10.13544/j.cnki.jeg.2017.04.013
    Citation: DENG Qing, ZHAO Qihua, PENG Sheqin, CHEN Jibin. 2017: DEEP UNLOADING FISSURE AND NON-HOMOGENEITY OF ROCK MASS USING ROCK DISCONTINUITY NETWORK SIMULATION. JOURNAL OF ENGINEERING GEOLOGY, 25(4): 993-1000. DOI: 10.13544/j.cnki.jeg.2017.04.013

    DEEP UNLOADING FISSURE AND NON-HOMOGENEITY OF ROCK MASS USING ROCK DISCONTINUITY NETWORK SIMULATION

    • The deep unloading fissure is a non-tectogenetic geological phenomenon in the high mountain and canyon areas. This special phenomenon has an important influence on the engineering construction. This paper surveys the characteristics of both conventional and deep unloading fissures in an adit at a hydroelectric power station. The fissures are simulated by rock discontinuity network simulation. Then a statistical code is implemented into Autolisp based on definition of RQD, and used to calculate the rock quality indices. The results of these analyses are used to detect the rock RQD value and its discrete standard under the different thresholds. Through the differences of RQD values, the type of unloading fissures can be identified. Furthermore, non-homogeneous characteristic of cracked rock mass is performed according to the dispersion of RQD values discrete standard.
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