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《Chinese Journal of Underground Space and Engineering》 2013-05
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Effect of Lateral Pressure Coefficients on Pressure-released Hole Combined Support with Rockbolt under Dynamic Disturbance

Song Xixian;Zuo Yujun;Zhu Wancheng;Mining College,Guizhou University;Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources,Guizhou University;Guizhou Engineering Lab of Mineral Resources,Guizhou University;Center for Rock Instability and Seismicity Research,Northeastern University;  
In order to investigate the influence mechanism of various factors on deep roadway of pressure-released hole combined support with rockbolt,the simulation study on the distribution pattern of stress field of surrounding rock and the failure characteristics of roadway of support model under dynamic disturbance are carried out by using the rock failure process analysis code RFPA-Dynamic.Through analysis,the general law of the stress redistribution of roadway surrounding rock of different lateral pressure coefficients under static-dynamic coupling loading is gained,and the damage effect of static-dynamic coupling loading to surrounding rock is analysed from the perspective of acoustic emission energy release of failure units.The study indicates that the lateral pressure coefficient λ plays a decisive role in the stress field distribution of roadway surrounding rock under the static and dynamic disturbance;dynamic disturbance becomes the main inducing factor of triggering rupture and instability of roadway under high confining pressure and it has different influence on the failure patterns of surrounding rock.
【Fund】: 国家科技支撑计划(No.2012BAB08B06);; 国家自然科学基金(No.50934006);; 贵州省自然科学研究重点项目(黔教科2010003);; 贵州省优秀科技教育人才省长资金项目(黔省专合字(2011)36号);; 贵州省高层次人才科研条件特助经费项目(TZJF-2010年-044号);; 贵州大学矿业学院研究生创新基金(2012008)支助
【CateGory Index】: TD353
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