... support method. Finite element modelling is used to determine the required support capacity and the maximum length of unsupported zone while constructing the decline and other underground excavations. The paper presents the description of the proposed underground mine and elaborates on support design...

...12th Asian Rock Mechanics Symposium, Hanoi, Vietnam - The 2022 ISRM Sponsored Regional Symposium ©2022 ISRM, VSRM. ISBN: 978-604-357-103-5 Do Nhu Trang, Pham Quoc Tuan et al. (Eds.) A Study of Modeling Damage Zone Around Tunnel Excavation by DEAL.II Hong-Lam DANG University of Transport...

...12th Asian Rock Mechanics Symposium, Hanoi, Vietnam - The 2022 ISRM Sponsored Regional Symposium ©2022 ISRM, VSRM. ISBN: 978-604-357-103-5 Do Nhu Trang, Pham Quoc Tuan et al. (Eds.) Advances in Rock Excavation Technology Seokwon Jeon* Department of energy systems engineering, Seoul National...

... from the same run of core. reservoir geomechanics Singapore sandstone wide range Reservoir Characterization strength median value asian rock mechanics symposium 29 Upstream Oil & Gas borehole jurong rock inflow deep excavation excavation tunnel structural geology isrm...

... the raise boring method is widely employed for shaft excavation in limestone quarries in Japan; however, this method possibly encounters serious troubles in fractured or weathered rock masses, such as collapse of shaft walls, stoppage of excavation, and breakage of tools. These troubles lead to an extension...

...) construction method using a pre-drilling by a double rock auger in combination was planned for excavation of cut off wall for water barrier, initially. However, if this plan was adopted, there should be tight schedule for the construction due to pre-drilling. The alternative with CSM (Cutter Soil Mixing...

... in and around the CTD during the tunnel excavation and water-filling. In parallel to the in-situ investigation, we perform a Hydro-Mechanical-Chemical (HMC) coupled simulation to enhance the understanding of the recovery process in fractured granite. This study presents the simulation results of excavation...

... Abstract Sequential excavation method (SEM) is commonly used for the underground rock cavern construction. One of the major focuses in the SEM process is the selection of the excavation sequence parameters including the subdivision of cavern cross-section and the round length. In this paper...

... as high as 800 km per annum in the hard rock industries, whereas the soft rock (coal) industry using a board and pillar layout far exceeded this. These excavations serves various purposes, from linking the stoping areas to the access excavations, to providing fresh air and travelling routes for man...

.... reservoir geomechanics data mining mesh isrm international symposium metals & mining excess layout shaft mining method spruitfontein fault zone reef wall beam Reservoir Characterization tendon Upstream Oil & Gas split reef extraction asian rock mechanics symposium 29 excavation...

... twin-tube-tunnel to be excavated mainly with tunnel boring machines (TBM), but also by drill & blast and drill & split. The drill & blast and drill & split tunnel section is in the first part of the Follobanen tunnels, near Oslo Central Station, and where the Follobanen tunnels go under...

... Upstream Oil & Gas cavern pelitic schist excavation reservoir geomechanics displacement anisotropic rock underground cavern Reservoir Characterization strength schistosity structure asian rock mechanics symposium 29 initial rock stress isrm international symposium discontinuity...

... issues shall be addressed in accordance with Eurocode EC 7 (ӦNORM EN 1997–1): Design concept for determining excavation and support Determination of safety relevant parameters, including definition of expected behavior and criteria for the assessment of the system stability on the basis...

... of ground associated with the excavation of tunnel portal. This is because of the increased computational cost required to model the detailed three-dimensional excavation process. As such, the use of idealized two-dimensional simulation can be expected in order to draw selected preliminary results...

... of this investigation. The plan of this transition section is shown in figure 2. The surrounding rock is graded 3 5 and the Norwegian method is adopted for the excavation. Initial support system against the rock includes shotcrete, prestressed cables and prestressed anchors. 10th Asian Rock Mechanics Symposium (ARMS10...

... adopted mainly owing to the lack of experiments. In this study, numerical analysis was conducted to grasp a rough outline of the influence of round length on the displacement and stress of support during excavation. Based on the results, field tests were conducted to examine the actual behavior...

... excavation, rocks around the crossheading gain large deformation (ZHANG, X., et al., 2004), and may even triggered roof fall, floor heaving and rib spalling (Li, D., et al., 2009). These problems seriously restrict the excavation speed (Wang, M., et al., 2016), which directly impact the safe and efficient...

... examples of application to open-cut excavation and tunnel construction, and presents details of the system using construction information modeling/management concepts. 1. Introduction The deformation and failure of slopes are important considerations in excavation under difficult ground conditions...

... Abstract This paper focuses on some key design principles for rockbolting in underground rock excavation. The items discussed include underground loading conditions, the natural pressure arch around the underground opening, design methodologies, the responses of rockbolts under different...

... between the years 1950 and 1984 in this country. At that time, the technology was a pure mining one, adapted to and modified for the purpose of underground storage. The room-and-pillar design (Fig. 1, left), classical in mining industry, represents this obvious mining heritage. The excavation used...