... tomography university excavation information mandela mining precinct drilling knowledge radar 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Mitigating the rock fall and rockburst risk in South African gold and platinum mines through advanced knowledge...

... rocscience recommendation hangingwall stability platinum mining parting plane guideline potvin mcop fog excavation metals & mining investigation rustenburg installation accessed 8 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Assessment of face...

... ABSTRACT: The numerical simulation is carried out for the dynamic response characteristics of cave-type excavation at the left dam abutment of Zhongyu Hydropower Station. The results show that within the range of 20∼100 m from the explosion source in the vertical direction, both the peak...

... into the tunnel during the excavation, the cause is assumed to be the high water pressure acting on the caverns connected to the lower part of the pavement, which could not be visually confirmed when the tunnel was excavated. After confirming the soundness of the tunnel structures and pavement concrete by non...

... ABSTRACT: High swelling pressures and heaves of anhydrite-rich marls and Opalinus Clay shale (OPA) caused substantial damage to the Belchen highway tunnels between Basel and Lucerne in Switzerland, excavated with drill-and-blast technique in the 1960s. The tubes have to be refurbished...

... ABSTRACT: At the Meuse/Haute-Marne Underground Research Laboratory several research programs have been dedicated to: (1) knowledge improvement of the Callovo-Oxfordian claystone response to the excavation; (2) development of the different disposal systems. In order to increase...

... detailed geological documentation of ∼20km of tunnels and ∼200,000m 2 excavated slopes were continuously integrated into this 3D geo model. Together with a co-operative approach between acting parties, an active project management and highly professional service providers, the flexible 3D model helped...

... and describe the displacement history during tunnel excavation, including that occurring ahead of the tunnel face. Experimentally determined LDP provide a valuable database for validation of the tunnelling approaches. This study is presenting the in-situ measurements of two geotechnical instrumentation...

...-Oxfordian (COx) claystone formation. Excavation of galleries at the main level of the URL, following essentially the in-situ horizontal principal stress directions (σ h , σ H ), shows a significant anisotropy of the induced fractured zones, leading to anisotropy of pore pressure distribution and convergence...

.... Excavation of these shafts requires special techniques, and the performance is dependent on the quality of rock mass. Therefore, the selection of an efficient construction method for shaft excavation is most challenging work. This manuscript evaluates the challenges associated with the construction...

... compressive strength display better resistance against excavation-induced stress and deformation. Notably, the station walls are more stable when station long axis aligns with the major horizontal stress σ H , but it is expected to be less favorable for station end-wall and tunnels connecting caverns...

... the past decades, TSP has been applied to several hundred hard rock tunnel projects worldwide excavating with a selection of Tunnel Boring Machines ranging from open gripper to single and double shield machines. The presence of a segmental lining is not necessarily a limitation since the required seismic...

... in the "Gemeinschaftskraftwerk Inn" (GKI). Part of the GKI is a 23.5 km long headrace tunnel. The excavations started in the design-bid-build model with a unit price contract, which was terminated during construction by mutual agreement. The alliance contract was chosen to continue the tunnel advance with a new contractor...

..., together with its proper integration in the contractual frame-work, play a crucial role. This paper presents cases of implementation of such a contractual mechanism in several Countries, standard forms and excavation methods together with the comparison with the FIDIC standard. INTRODUCTION In order...

... are currently excavating the Main Tunnels, which are of equal length but have a diameter of 10.71 m. The geological context consists of metamorphic geological units ranging from gneiss, micaschists, phyllites to marbles and intercalations of evaporitic units. About 21 significant fault zones were crossed. Due...

..., are addressed. INTRODUCTION The BBT is a system of underground structures currently being excavated to build a high-speed railway connection between the town of Fortezza (Italy) and the city of Innsbruck (Austria). The project mainly consists of two main tubes (MT) and an exploratory tunnel (ET) excavated...

... ABSTRACT: New customized testing equipment specifically developed to address the dynamic fracture of material excavated by a roadheader at a laboratory scale is shown. Furthermore, limestone and cement-based material samples are tested to analyze the response of both the material...

...-tube tunnel, in which service tube will be used as a rescue route and an additional source of air for ventilation. The area of the excavation profile of both tubes is approximately 75 m 2 , and the operating clearance width and height are 6.86 m and 7.00 m, respectively. Despite that the area...

... instruments were validated against the numerical analysis findings. INTRODUCTION The airport tunnel includes a 3 km tunnel that connects the Marie-Curie station to the Montreal Airport station. The tunnel is excavated with an EPB TBM shield machine with a diameter of 7.37 m. The 6+1 segmental lining...

... be retrieved during subsequent phases of excavation, typically under conditions of extreme stress. The purpose of this work is to examine the geomechanical parameters affecting pillar stability and behavior under the complicated nature of the rock mass in-situ, boundary conditions, and operational complexities...