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Numerical simulation research on response characteristics of surrounding rock for deep super-large section chamber under dynamic and static combined loading condition

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Journal of Central South University 2020年第12期27卷 3544-3566页

作者： FAN De-yuan LIU Xue-sheng TAN Yun-liang SONG Shi-lin NING Jian-guo MA Qing School of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Mining Disaster Prevention and Control Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Water Resource Protection and Utilization in Coal Mining China Energy Group Co.Ltd.Beijing 100011China

The stability control of surrounding rock for large or super-large section chamber is a difficult technical problem in deep mining *** on the in-site geological conditions of Longgu coal mine,this paper used the dynamic module of FLAC3D to study the response characteristics of deep super-large section chamber under dynamic and static combined loading *** showed that under the static loading condition,the maximum vertical stress,deformation and failure range are large,where the stress concentration coefficient is *** maximum roof-to-floor and two-sides deformations are 54.6 mm and 53.1 mm,***,under the dynamic and static combined loading condition:(1)The influence of dynamic load frequency on the two-sides is more obvious;(2)The dynamic load amplitude has the greatest influence on the stress concentration degree,and the plastic failure tends to develop to the deeper;(3)With the dynamic load source distance increase,the response of surrounding rock is gradually *** this basis,empirical equations for each dynamic load conditions were obtained by using regression analysis method,and all correlation coefficients are greater than *** research provided reference for the supporting design of deep super-large section chamber under same or similar conditions.

关键词： deep mining super-larger section chamber static load dynamic load frequency dynamic load amplitude dynamic load source distance

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