Fracture mechanism of inversed trapezoidal shaped tunnel excavated in 45° inclined rock strata

查看全文 作　　者：He [1,2]Manchao;Peng [1,2]Yanyan;Zhao [3]Shuaiyang;Shi [1,2]Haiyang;Wang [1,2]Ning;Gong [1,2]Weili

机构地区：[1]School of Mechanics and Civil Engineering, China University of Mining & Technology;[2]State Key Laboratory for Geomechanics & Deep Underground Engineering;[3]College of Geoscience and Surveying Engineering, China University of Mining & Technology

出　　处：《International Journal of Mining Science and Technology》索引2015年第25卷第4期,共5页

摘　　要：In order to understand failure mechanisms of the tunnel excavated in the stratified rock masses in deep mine, the physical modeling experiment by using the large-scale model was carried out. The field case simulated in the experiment is a main connection tunnel located at depth of 1000 m in Qishan coal mine,Xuzhou mining district. Tunnel deformation was monitored by using strain gauges and a video camera simultaneously. Crack initiation and propagation process during the test were analyzed based on image analysis of the captured video photographs. At the same time, deformation process of the key monitoring points around the tunnel section is given by the monitored strain plots. Under the increasing external loads, crack initiation occurs firstly on the left wall of the tunnel, then on the immediate roof.Complete failure of the tunnel occurs as a result of the slippage of the rock layers along the interfaces. 关键词：梯形隧道隧道开挖断裂机理倾斜岩层物理模拟试验倒置裂纹萌生破坏机理

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Fracture mechanism of inversed trapezoidal shaped tunnel excavated in 45° inclined rock strata

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耦合文献(281)

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