... Abstract This presentation introduces the trend and advances in mechanical rock excavation technology. The interaction between rock and cutting tool has been studied in theoretical and numerical models. With accumulation of rock cutting data, various prediction models of cutting performance...

... the decline and other underground excavations. The paper presents the description of the proposed underground mine and elaborates on support design of the decline in such a friable rock mass condition. Introduction The chromite ore deposit at a surface mine located in eastern India has reached its...

... Abstract The excavation damaged zone is still challenge in modeling up to now. The explicit introduction of cracks in the numerical simulation may be suitable for a few of cracks but it is difficult to handle if the number of cracks increases significantly. Another method to solve this issue...

... was predicted. Results show that the force path of ductile multilevel yielding support structure is clear. After the excavation of the tunnel and before the application of the concrete lining support, displacement increment of the primary support structure is large. The latter gradually slows down with time...

... Abstract Based on the Labor Park Metro Station Project in Dalian area located at the upper soft and lower hard composite stratum, in order to determine the reasonable excavation sequence and excavation footage of pilot tunnels of PBA method, the yield approach index (YAI) is introduced...

... transmission and small surface settlement[4-7], which has been widely used in the construction of Beijing subway station[8-10]. In recent years, many domestic experts and scholars have studied the PBA method. Yuan Yang[11]et al. simulated the excavation process of pilot tunnel under different schemes...

... rock mass during the excavation of deep buried tunnel has become important for the field of underground engineering. The traffic tunnel of Shuangjiangkou hydropower station is studied to identify the failure mechanism of surrounding rock mass of deep buried tunnel. We introduced microseismic monitoring...

... Abstract The safety of the high rock slope under blasting loading is of great concern during the engineering construction. A better understanding of vibration distribution and reasonable monitoring scheme are essential to control the dynamic response induced by blasting excavation of high rock...

... and model the failure process around single borehole in rock mass, various numerical methods such as FEM, UDEC, FLAC, DEM, DDA and combined methods were used. The induced damage zone around the excavation was simulated under different lateral pressure coefficients based on the general damage model...

... main transformation caverns of Jinping I hydropower station during its excavation [3]; a collapse of more than 3000 m 3 in the Dagangshan main powerhouse occurred due to β 80 weak discontinuity, causing a substantial increase in supporting cost [4]. In addition, several inner cracks had been...

..., to identify the potentially stressed zones and assess the stability of the underground excavation. The finite element method is used to develop a numerical model using GTS NX software. The software aided in evaluation of stress distributions and stability of the closed mine since the mine presents a hydro...

... Abstract In the excavation and unloading process of large-scale underground engineering, surrounding rock mass damages such as splitting, rock burst and collapse will often occur, affecting the progress and safety of the project. Correctly identifying and delineating the potential instability...

... integrated into the universal distinct element code numerical model, and it can adjust its bearings and strength. The numerical model assumes an elastic rock mass with potential fractures because the dynamic-related bulking surrounding excavations is mainly caused by the separation and sliding of fracture...

... the engineering properties of mudstone. These events, however, are ignored in the existing rock classification schemes. sedimentary rock structural geology wellbore design clastic rock rock type reservoir geomechanics environmental science 861 drainage tunnel tunnel excavation mineral geological...

... found on the slope surface; the calculation results also show that the incremental deformation of subsequent excavation of the slope is not significant and the safety factor values during the construction and operation periods meet the requirements of the design specifications; the targeted...

... Abstract The accurate assessment of rock mass strength and the failure zone near the excavation is important for the rational design of underground structures. To predict the strength and behaviour of the rock mass during excavations, generally, the two most widely used failure criterion...

... controlling factors affecting bridge safety. The maximum slope height formed by the excavation of the gravity anchor foundation pit on the Sichuan Bank of the Kahalo Jinsha River Bridge is 110 m, and the anchorage area is located on the (equation) thick accumulation with a thickness of more than 170 m. First...

... effect of blast loading and transient unloading are considered. In expansive excavation blasting, the convergent deformation caused by transient unloading is about 4 to 6 times greater than that caused by blast loading, and the deformed rock mass area caused by transient unloading is about 2 to 3 times...

... element solutions. Lastly, the finite element method and the multilayer wedge model are employed to analyze the stability of tunnel face in aquifer-aquitard alternate layers with confined water. 1. Introduction With the increase of underground space excavation scale, shield tunneling in a coastal area...

... and high stress factors is the fundamental cause of large deformation caused by excavation. Finally, the reinforce measures and reinforcing range had been determined, and the stability of the powerhouse cavern has been evaluated according to the monitoring results for nearly 2 years after excavation...