... ABSTRACT: Measurement of the pre-excavation 3D stresses is of great importance for mining, petroleum and other underground rock engineering. An alternative method by differential-direction drilling (called D 3 method) without overcoring was recently developed based on back-analysis...

... ABSTRACT: This paper details proactive measures taken to identify adverse geological structures present in the rock mass before mining occurred in the area. During the sinking of Glencore's Onaping Depth winze and subsequent excavation of the shaft stations, a major fault had to be crossed...

... release and control when compared to the Lucky Friday Underhand Longwall method (Board et al., 2022; Armatys, 2023). This collaborative opportunity was realized and leveraged NIOSH's modeling expertise and Hecla's proprietary mining method, which is beneficial for both parties. excavation...

... ABSTRACT: This paper presents several geotechnical challenges experienced while excavating two shaft stations at the depths of 2490 m and 2550 m in highly stressed grounds, along with engineering solutions that effectively reduce exposure and risk associated with the excavations. Proactive...

... The stability of tunnel by the conventional excavation is treated based on a thought whereby the ground surrounding an underground opening becomes a load bearing structural component. The thought considers the activation of the support load of the ground and the interaction with the installed support system...

... subjected to various structural interventions. Recent studies by scholars such as (Rama Sastry, 2023), (Li Li, 2023), and (Zhiming Li, 2023) have addressed tunnel stability issues arising from diverse geological features encountered during excavation worldwide. Utilizing laboratory testing and software...

... predicting ground behavior, including identifying adverse failure mechanisms that may be critical for the design or interlocking mechanisms that maintain stability of the excavation. The DFN-based design approach to underground space have been successfully applied by authors such as Haryono (2022) and Weir...

... excavation (Boldini et al. 2005; Zhang et al. 2018). This innovative approach employs a thin layer of sprayed concrete, commonly known as shotcrete, to reinforce the tunnel walls and reduce the load on the final linings or subsequent rock support elements. Shotcrete serves as a versatile and effective...

... ABSTRACT: The production rate of mechanical excavators such as tunnel boring machine (TBM) and roadheader depend on the geotechnical properties of rock, machine specifications and operational parameters. TBMs are being utilized for the construction of various tunnels for the purpose of access...

... displacement and support load. CCM utilizes either analytical closed-form solutions or empirical Longitudinal Displacement Profiles (LDP); however, it usually neglects the influence of time-dependency of ground response and associated gradually increasing deformations even after the excavation stage. Designing...

... data analysis and visualization in a web browser, a ground-machine interaction model to predict the TBM advance rate and operation anomalies detection via machine learning algorithms to enhance the efficiency and reliability of tunnel excavation operations. In collaboration with ACCIONA, the system has...

... ABSTRACT: One of the main challenges in geotechnical engineering involves addressing hazardous areas on the ground surface when conducting underground excavation using Earth Pressure Balance (EPB) in urban areas, particularly those with historical buildings. Given Seville's status...

.... Brierley Associates supported KEV by providing temporary support of excavation system designs for various segments of the open-cut trench excavation through soils and rock. The rock along the project alignment consisted of layered limestone, dolostones and shale beds with predominantly subvertical...

... ABSTRACT: Being able to predict the dimensions of excavation damage zones (EDZs) is crucial for the design of permeability-sensitive structures. This study focuses on predicting excavation-induced damage depth using a machine learning method called multi-layer perceptron (MLP). The inputs...

... reservoir geomechanics artificial intelligence geological subdiscipline structural geology reservoir characterization frequency sensor machine learning mechanism magnitude mining inversion mendecki objective potency excavation deformation information waveform malovichko limitation...

... ABSTRACT: In order to estimate the depth of the Excavation Damage Zone (EDZ) using empirical or numerical approaches, the key intact properties include the Uniaxial Compressive Strength (UCS), the tensile strength, and the crack initiation threshold. In addition to these test derived values...

... of excavation compensation and the requirements of traffic tunnel engineering on the anchorage system, this paper proposes a high prestressing anchorage system applicable to large deformation tunnels traversing fault fracture zones and capable of realizing the concept of timely support, and the application...

... is a numerically demanding task. Previously, a semi-empirical approach to evaluate the extreme depth of failure based on elastic modelling has been suggested. It can be adopted at a mine scale by performing explicit modelling of large excavations (stopes, caves, chambers, etc) and then approximating anticipated...

... ABSTRACT: Rockburst is a sudden and violent failure characterized by the breaking up and expulsion of rock from its surroundings. Tunnel rockbursts pose a significant threat to the safety of excavation operations, leading to property damage and tunneler casualties. Buckling has been identified...

... ABSTRACT: In a highly stressed environment, massive rock masses fail through stress fracturing, resulting in rock slabs or spalls that can detach from the excavation perimeter either progressively in a non-violent manner as spalling, or suddenly and violently in the form of strainbursting...