The analysis of 3-dimensional numerical modelling indicated that two distinct layers comprising (i) laterite/part of the course to medium-grained sandstone and (ii) developed galleries of R-IX seam exhibited a very low safety factor below 1.0, indicating potholing/subsidence susceptibility.
Study with Quizlet and memorize flashcards containing terms like 1) In the opening case, police detectives used data mining to identify possible new areas of inquiry., 2) The cost of data storage has plummeted recently, making data mining feasible for more firms. Answer:, 3) Data mining can be very useful in detecting patterns such as credit card fraud, but is of little …
Aiming to increase people's confidence in numerical modeling in civil and mining geotechnical engineering, the author accepted the journal invitation to host this SI. ... Karim, …
Two-dimensional numerical model dal case study II Numerical modeling of open pit (OP) to underground (UG) transition in coal mining 43 Fig. 10. Two-dimensional numerical model dal case study III. Note: Speed of exploitation is omitted, only the size of coal extraction has been taken into account.
This paper presents a case study of damage in the concrete lining of an operational tunnel by field investigation and numerical analysis, in which the field-investigated construction deficiency is ...
Following paper deals with a case study for design of stope dimension of an underground mine based on Mohr coulomb elasto-plastic failure analysis using numerical modeling method. Numerical models ...
Numerical modeling of pillar recovery In this study, a part of the main panel was modeled in 3DEC with nine chain pillars of 15.5 × 4.5 × 1.8 m and two barrier pillars of 80 × 20 × 1.8 m on both sides of the stope (Fig. 3). Figure 3b shows a cross section of the model in which pil-lars 1–4 are supposed to be recovered.
Importance of numerical modeling in mine design gained pace after modern way of approach took birth through many variants. Methods such as Continuum and Discontinuum emerge as most effective in resolving certain …
Numerical modelling has been used to investigate a variety of problems in underground mining and tunnelling: subsidence induced by longwall coal mining; stresses generated when an open stope is filled cemented backfill and the stability of exposures created during subsequent mining of adjacent stopes; the interaction of two tunnels; and the effects of under-mining a pre …
Once the fracture status has been monitored, we utilize the developed numerical model to study the impact of irregular fractures on heat energy recovery, as depicted in Fig. 16. The initial temperature of the reservoir is 460K. The injection well continuously supplements fluids into the reservoir.
duced. Numerical modeling techniques will then be used to back-analyze the case to find the principle for yield pillar design. 3 Case Study 3.1 Geological and Mining Conditions A coal mine in China (Fig. 4a) was selected for the case study. The longwall panels associated with this study were 3100, 3102, and 3104, all of them extracted the No ...
Case Studies: Real-World Examples of Numerical Modelling in the Mining Industry. Numerical modelling has been used successfully in numerous mining operations worldwide. One example is the use of …
Numerical Modelling of Mechanical Behavior of Coal Mining Hard Roofs in Different Backfill Ratios: A Case Study. July 2017; Energies 10(7):1005 ... In coal mining hard roofs are one of the main ...
The onsite short-term Seismic Monitoring studies and Numerical Model studies were carried out to identify the vulnerable areas in the closed mine and to study the ground …
Also, the study can provide a back-analysis method to calibrate the material properties of rock mass and fault used in the model. The numerical model assessed the impacts of the major fault on longwall mining, including the changes of peak abutment stress, redistribution of strain energy in coal seam and seismic energy released by fault-slip ...
Physical modelling to provide data-rich case studies for the verification and validation of numerical modelling predictions of cave mechanics problems J Wesseloo Australian Centre for Geomechanics, The University of Western Australia, Australia D Cumming-Potvin Australian Centre for Geomechanics, The University of Western Australia, Australia
study is to explore whether rigorous geotechnical modelling provides a sufficiently high-fidelity representation of tailings dam behaviour through comparisons with InSAR and ground-
A surrogate-based inverse modeling workflow is then developed by combining the surrogate model with the differential evolutionary algorithm. Numerical studies performed on a synthetic naturally fractured reservoir model with multi-scale fractures illustrate the performance of the proposed methods.
This article proposes an in-situ steam-assisted thermal decomposition method for oil shale using long-distance horizontal wells.Firstly, this article establishes a coupled thermal–hydraulic hydrothermal mechanical model considering the anisotropy of oil shale to study the in-situ pyrolysis process of oil shale by steam injection in horizontal wells. Then …
In this study, a 3D numerical modeling approach is utilized for a case study mine and the results are compared and verified against collected field measurements. Initially, …
Abstract The paper presents results of numerical calculations and modeling of mining-induced surface deformation based on Finite Element Method (FEM). Applying the numerical method discussed to calculations allows us to assume a larger number of factors, such as rock mass structure, fracture network, rock properties, etc., which essentially affect the …
Development and use of numerical modeling in rock excavations. Finite element (2D and 3D). Boundary element (2D and 3D). Displacement and continuity. Basic equations for mathematical modeling of rock mass. Static and dynamic behavior of rock mass. Elastic-linear and non-linear, elastoplastic and time dependent models. Case studies.
Among these factors, reservoir construction, water discharge and BMC have been regarded as the most critical factor of downstream sediment transport in many cases, and common methods for these investigations mainly include field observation analysis, physical modelling and numerical modelling (Zhang et al., 2017, Zhou et al., 2019, Yang et al., 2022).
Seismicity in Deep Closed Mines: A Case Study Praveena Das Jennifer, P. Porchelvan, and Sripad R. Naik Abstract Mining Induced Seismicity may be defined as a type of dynamic disaster ... Numerical Modelling of Mining Induced Seismicity in Deep Closed Mines … 445 Fig. 7 3D model of (a.) Sect. 1 (b.) Sect. 2 identified for analysis
This paper presents a case study of a mine where adverse seismicity and rockbursting halted production in a critical mining zone in 2023. Numerical modelling and seismic data …
Numerical modelling has been used to investigate a variety of problems in underground mining and tunnelling: subsidence induced by longwall coal mining; stresses generated when an …
This case study analyses possible dewatering solutions related to a change in the mining drainage system: decommissioning by flooding of a depleted deposit and dewatering …
Deep Coal Mining by Numerical Modeling and a Case Study Shankar Vikram, Dheeraj Kumar and Duvvuri Satya Subrahmanyam Abstract Importance of numerical modeling in mine design gained pace after modern way of approach took birth through many variants. Methods such as Continuum and Discontinuum emerge as most effective in resolving certain issues.
@inproceedings{Hussain2022ProposingAV, title={Proposing a Viable Stabilization Method for Slope in a Weak Rock Mass Environment using Numerical Modelling: a Case Study from Cut Slopes}, author={Sajjad Hussain and Zahid ur Rehman and Naseer Muhammad Khan and Ishaq Ahmad and Salim Raza and Muhammad Tahir and Asad and Ullah and Daniel Afzal and ...
Chen, T., & Mitri, H. S. (2021). Strategies for surface crown pillar design using numerical modelling – A case study. International Journal of Rock Mechanics and ...
Using numerical models, this paper analyses the specific case of a coal seam mined by the sublevel caving method at a depth of 1000 m which suffers significant increases in stress and major deformations in certain advance headings as a result of variations in the geometry and dimensions of the load itself, in particular, thinning.
4. Numerical model generation 4.1. Numerical model and modeling schemes. In order to investigate the stress changes and plastic zone distribution within coal pillars of different sizes, a numerical model with plane-strain conditions is generated to simulate a thin slice. The dimension of the model is 201.0 m × 91.7 m × 1 m.
The mining distance for each step was 8 m, with a total mining distance of 96 m over 13 mining steps. Numerical simulation analysis without grouting. The first numerical model iteration simulated the mining process without grouting of the floor.
Although analytical models and physical models are useful to analyse the fault-slip burst phenomenon, 6, 9 numerical approach is a more proper tool when investigating the coal burst risk caused by fault-slip in a specific mine site, as it can provide more fundamental and rigorous insights into complex mining and geological scenarios. 10, 11 For source …
The study used the tunnel design parameters in section "Parametric study using continuum modeling" for numerical modeling. Three stages were simulated: in-situ, excavation, and support systems.
his study is to develop crown pillar design strategies using numerical modelling. Firstly, a mine case study of a shallow deposit with an. overlying TSF is examined for crown pillar stability …
Applying conceptual and numerical models to aquifer management – a Case Study from Northeast Brazil. ... having worked in numerous consulting projects for the mining, beverage and oil& gas industries, as well as water supply assessments for the public sector. ... Besides technical project work he is frequently required to provide training ...
In this case study, the proposed mineral prospectivity mapping approach based on numerical modeling has demonstrated significantly better results compared with the spatial …