... 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...

... 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...

... excavation undergr thickness arch Abstract It is of great interest to investigate the excavation disturbance mechanism of branch tunnel in the upper soft and lower hard ground. In this paper, a fine 3D numerical simulation, considering the longitudinal gradient of tunnel, was performed...

... geologist reservoir characterization prestressed anchor cable structural geology geological subdiscipline society iop publishing iop conf conference stability reservoir geomechanics overloaded anchor cable increment adjustment excavation powerhouse anchor cable cable...

... Abstract Longitudinal deformation profiles, one of the three curves in the convergence-confinement method, is widely used to analyse tunnel deformation and optimize tunnel supports. Due to the complex geological and excavation method, accurate wall deformation of the whole excavation process...

... this problem, an flexible and pragmatic engineering countermeasure with a controllable cost and without sacrificing safety is proposed, by adjusting location of a south construction adit between the east and west tunnels. Besides, improvements on tunnel face excavation method and relative blasting parameters...

... reservoir simulation geologist bayesian inference reservoir geomechanics geology artificial intelligence environmental science 861 deviation geological subdiscipline lateral displacement conference information society iop publishing iop conf elasticity modulus excavation machine...

... of 15.85 mm. Finally, building 4 and ground on the east side adjacent to buildings 12 and 13 were affected by the construction of the pit. The PSs on them showed a significant settlement trend after the excavation. 1. Introduction With the development of society and the expansion of cities, subways...

... Abstract The dynamic response of rock stratum in a small-spacing tunnel under a blasting load is studied based on field vibration monitoring of the drilling and blasting excavation of a small-spacing tunnel in the WenLing city railway S1 section. The vibration velocity spectrum, amplitude...

... the existing support evolved from traditional advanced pre-support. Pre-structure should be formed along with tunnel profile before excavation at the tunnelling face. On the one hand, it could effectively control the deformation of surrounding rock in front of the excavating face; on the other hand, the pre...

... Abstract When the penetration and head aperture ratio of a cutter head are small, much earth will be clamped between the cutter head and the excavation face. This clamped earth directly balances most of the pressure from the excavation face, instead of the slurry pressure in the head chamber...

... Abstract The presence of cracks at the surface of rock excavations can influence the stability of the excavations. In this study, failure behaviour of open and closed cracks under different loading conditions was investigated. For this purpose, the compression tests on the rock specimens were...

... Abstract In the construction of deep-buried and long-mileage tunnels, the use of tunnel boring machines (TBMs) is the preferred excavation method. However, TBMs encounter a variety of problems in adverse geological conditions. When excavating in weak rocks with high in situ stress, the large...

... geologist structural geology rock type rockburst geological subdiscipline reservoir geomechanics reservoir characterization plate tectonics hydraulic fracturing electromagnetic radiation intensity conference society iop publishing iop conf excavation monitoring environmental...

... reservoir geomechanics excavation anchor cable conference geology criterion tensile strength deformation geologist equation reservoir characterization society iop publishing iop conf geological subdiscipline criteria environmental science 861 comprehensive failure mechanism...

... geologist risk management underground cavern geology excavation geological subdiscipline society iop publishing iop conf reservoir geomechanics powerhouse risk and uncertainty assessment cavern environmental science 861 underground powerhouse construction acceptance criteria...

... Abstract The construction of interchange passages, which are important appurtenances to metro traffic, often has problem of close proximity to existing buildings. This paper takes the shield excavation project of interchange passage at Jinjiadu Station of Hangzhou Metro Line 2 and Line 4...

... geologist reservoir geomechanics excavation lining tunnel geology reservoir characterization society iop publishing iop conf deformation evolution conference wellbore design geological subdiscipline environmental science 861 tensor unrecoverable time-dependent deformation time...

.... The surrounding rock masses tend to lose integrity and continuity due to various geological structures, and to suffer from strong unloading disturbance due to the rapid underground excavations [1-4] . Especially, when the large cavern group encounters an interlayer namely weak interlayer zone (WIZ...