大数量非贯通节理岩体离散元数值模拟实现方法研究

doi:10.13722/j.cnki.jrme.2016.1290

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Abstract

To understand mechanical behaviors of joint rock with large number of non-persistent discontinuities，a new calculation of the connectivity，defined as the radio of non-persistent joint area to apparent persistent joint area，is presented based on the 3DEC discrete element software. The non-persistent joint area can be evaluated according to 3D discontinuities network through calculation of thin disk area. The apparent persistent joint area is closely related to the geometry of cutting rock mass which can be subdivided into regular and irregular shape. In the case of regular rock mass，the apparent persistent joint area is computed by simultaneous equations. For irregular rock mass，the area can be obtained using points searching approach. The proposed method is validated by two examples，and the results show that the study can achieve the numerical simulation of the mechanical behavior with respect to larger number of non-persistent jointed rock mass，and points searching approach can solve the areas of cross sections in both regular and irregular shaped rock mass efficiently. Additionally，simulation results are reliable which have good agreements with reality in two examples.

Key words： rock mechanics larger number of non-persistent joints joints network simulation points data search method discrete element method 3DEC simulation

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.1290 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/IS2/3760

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