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Keywords: excavation
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Proceedings Papers
Advances in Rock Excavation Technology
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Paper presented at the ISRM Regional Symposium - 12th Asian Rock Mechanics Symposium, November 22–26, 2022
Paper Number: ISRM-ARMS12-2022-001
... 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...
Proceedings Papers
Mine Design in Friable Rock Mass under an Open-cast Mine
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Paper presented at the ISRM Regional Symposium - 12th Asian Rock Mechanics Symposium, November 22–26, 2022
Paper Number: ISRM-ARMS12-2022-013
... 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...
Proceedings Papers
A Study of Modeling Damage Zone Around Tunnel Excavation by DEAL.II
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Paper presented at the ISRM Regional Symposium - 12th Asian Rock Mechanics Symposium, November 22–26, 2022
Paper Number: ISRM-ARMS12-2022-007
... 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...
Proceedings Papers
Numerical Simulation of New Support Structure for High In-Situ Stress Tunnel of Sichuan—Tibet Railway
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-107
... 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...
Proceedings Papers
Study on Optimization of Excavation Scheme for Pilot Tunnels of Pile-Beam-Arch Method in Upper Soft and Lower Hard Stratum
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-108
... 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...
Proceedings Papers
Structural Stress Analysis and Surface Settlement Study of a Subway Station in Beijing
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-091
... 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...
Proceedings Papers
Deformation and Failure Analysis of Surrounding Rock Mass in Deep Buried Tunnels Subjected to Excavation
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-069
... 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...
Proceedings Papers
Spatial Distribution of Vibration and Damage of High Rock Slope Under Blast Loading
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-149
... 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...
Proceedings Papers
Numerical Simulation of Fracturing Process Around Boreholes Under Static-Dynamic Loads by Coupling Two FEM Models and Damage Mechanics
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-162
... 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...
Proceedings Papers
Close Feedback Stability Analysis and Design Optimization Under EPC Condition for Large Underground Caverns
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-172
... 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...
Proceedings Papers
Stability Analysis of an Abandoned Deep Metal Mine Using Numerical Analysis Tool: A Case Study
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-165
..., 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...
Proceedings Papers
Deformation and Stability Analysis of Surrounding Rock Mass in Deep Underground Cavern Based on Microseismic Monitoring and Numerical Modelling
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-159
... 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...
Proceedings Papers
Numerical Analysis of Ground Support Systems Subjected to Dynamic Loading
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-166
... 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...
Proceedings Papers
A New Perspective for Support Design of Shallow Tunnels in Mudstone Formation: Basic Philosophy and Engineering Practice
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-178
... 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...
Proceedings Papers
Stability of Large-Scale Slope Excavated in Weak Rocks with Faults: A Case Study
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-152
... 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...
Proceedings Papers
Comparison of H-B and M-C Failure Criterion at Low Confinement and Their Impact on the Prediction of Failure Zone Around an Underground Metal Mine
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-190
... 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...
Proceedings Papers
Slope Stability Analysis and Protection of Deep Accumulation Excavation Foundation Pit in the Sichuan Bank of the Kahalo Jinsha River Bridge
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-263
... 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...
Proceedings Papers
Study on the Influence of Transient Unloading on Surrounding Rock Deformation in Expanding Excavation Blasting
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-211
... 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...
Proceedings Papers
Stability Analysis of Shield Tunnel Face Under Complex Ground Conditions
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-228
... 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...
Proceedings Papers
Analysis of Large Deformation Mechanism of the Underground Powerhouse at the Baihetan Hydropower Station
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Paper presented at the ISRM Regional Symposium - 11th Asian Rock Mechanics Symposium, October 21–25, 2021
Paper Number: ISRM-ARMS11-2021-301
... 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...
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