numerical modelling case studies in mining

Support System Design for Deep Coal Mining by Numerical Modeling and a Case Study. Written By. Shankar Vikram, Dheeraj …

Recirculation—Case Study with Numerical Modelling. Energies 2021, ... [26]—are used to model inflows in mining. Simulation calculations may be carried out for ...

Hydrodynamic field distribution of the middle Devonian aquifer (Layer 3 in the model)-Variant 2. Blue cells - contours of open-pits, red cell - exploitation well, purple cells - flooded pit of the ...

This study takes Jining, a typical land subsidence city in eastern China, as a case study to investigate the features and control of land subsidence under the combined action of groundwater extraction and coal mining. A three-dimensional numerical model of land subsidence considering groundwater extraction and coal mining is established.

In this paper, using the discrete element method (UDEC), numerical simulation was carried out to investigate deformation features and the failure mechanism of the steep rock slope under mining activities and rainfall. A steep rock slope numerical model was created based on a case study at the Wulong area in Chongqing city, China.

The numerical analysis proved that the values of open pit slope displacements were affected mainly by underground exploitation depth, direction of operation (i.e., from one slope to the other) and ...

Stress redistribution induced by mining activities can cause the reactivation of a fault resulting in a coal burst. To study the mechanism of reverse fault reactivation, a reverse fault conceptual model was built. As shown in Fig. 1, the model was compressed by orthogonal stress, so the normal stress σn and shear stress τ acting on fault can ...

Case study. After verifying the numerical model against experimental data, the migration of mining pit in Helleh River in Bushehr province was considered as a case study. The length of the study area was 2.5 km upstream and downstream of a village near Abpakhsh district.

To understand the dynamic behavior of induced seismicity, numerical modelling tools can be used in addition to seismic methods available. The study presents an approach to analyze the effect of mining induced seismicity on a closed deep underground Kolar Gold Fields mine …

Support System Design for Deep Coal Mining by Numerical Modeling and a Case Study. June 2021. DOI: 10.5772/intechopen.97840. License. CC BY 3.0. In book: Theory and Practice on Tunnel Engineering ...

Strategies for surface crown pillar design using numerical modelling – A case study Tuo Chen Department of Mining and Materials Engineering McGill University August 2020 A …

Numerical modelling technique has been used to simulate the different types of shoring systems. Three case studies have been taken for evaluating the shoring system for excavation at other conditions. The results of the numerical simulation in terms of Bending moment, shear forces, displacement, and axial forces have been analysed for …

After verifying the numerical model, a critical reach in Helleh River was selected as a case study. The effect of sand and gravel mining on a bridge at the site was studied. The results also indicated that for a flood event with a return period of 25 years, sand and gravel mining changed the bed profile up to 1.27 m at the bridge foundation.

In the study by Li et al. (2015), for the numerical analysis of yield pillars, the gob material was modeled assuming a bulking factor of 1.216 resulting in a maximum strain parameter (b) of 0.17 ...

In this case study, the proposed mineral prospectivity mapping approach based on numerical modeling has demonstrated significantly better results compared with the spatial modeling method. Nevertheless, it is important to acknowledge that numerical modeling results are highly sensitive to initial and boundary conditions, as well as ...

The modelling strategy is studied using a case study mine from Canadian mining industry. In the end, results of numerical model parametric study are shown and discussed. Numerical modelling is broadly used for assessing complex scenarios in underground mines, including mining sequence and blast-induced vibrations from produ

The variation of hard roof thickness is an essential contributor in triggering rock bursts during longwall mining. Case analysis and numerical modeling were used to study the stress and energy ...

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, a 2D numerical model is generated using the method developed by Tulu et al., which is based on a modeling approach developed by NIOSH. After …

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 …

The simulated numerical model in this study is calibrated against a case study, cited in Peng et al. . Furthermore, this study considered various factors that accord with field practice, including the geology and mining geometry of the case study, the casing properties, and the gob-compaction process.

The present study indicated that numerical modelling is essential for the validation of support recommended on the basis of empirical methods. The present work also indicates that numerical models, specifically the RS2 software, are capable of precisely predicting both thickness of the plastic zone around the tunnel and the tunnel's …

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 …

There are, however, very few studies on this aspect. In this study, a numerical code, named LS-DYNA, that is based on a combination of smoothed particle hydrodynamics and a finite element method, was used. The numerical modeling shows that the tailings slurry flow can generally be divided into four stages.

In this paper, a new approach for parameter inversion of the D-Y model is proposed and applied to a real case study involving repeated mining in multiple coal seams. The proposed framework combines FLAC3D, a finite element numerical simulation software, with a new computational tool developed using MATLAB® App Designer.

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. Cases such as heterogeneity, prevailing boundary conditions in continuum case and presence of …

The depths of open-pit mines have been increasing in the last few decades. This transformation generates a vast amount of waste rock material per unit mining area imposing a significant economic, social and environmental liability on the mine operators. The scarcity of dumping land along with the rise in population, competing urbanization …

Numerical modeling is largely used in geotechnical engineering to understand the responses of infrastructures in civil and mining engineering. Many …

The room-and-pillar technique is a self-supporting mining method in which part of the ore is left unmined as pillars. To increase the mining efficiency, the pillars are later recovered partially or completely. This research aims at evaluating and comparing four methods of pillar recovery, namely, 'pocket and wing', 'open ending', 'split and fender', …

5.1 Numerical Model Generation. As shown in Fig. 11, the Flac3D software was used to model each stratum from bottom to top, resulting in a numerical model that is 420 m long, 160 m wide, and 82 m high,, relying on the mining geological information of the 11,215-working face. The length of the working face along the dip is 280 m, the …

The primary goal of this study is to develop crown pillar design strategies for complex conditions using numerical modelling. A mine case study of a shallow deposit …

ABSTRACT. Three-dimensional dynamic analysis was carried out using FLAC 3D to investigate the rock mass response to multi-seam longwall coal extraction conducted in the vicinity of major faults. The study was undertaken to verify the hypothesis of such faults being a possible source of intense rock mass tremors which may in turn lead to rockbursts.

The effective detection and monitoring of mining tailings' leachates (MTLs) plays a pivotal role in environmental protection and remediation efforts. Electrical resistivity tomography (ERT) is a non-invasive technique widely employed for mapping subsurface contaminant plumes. However, the efficacy of ERT depends on selecting the optimal …

Some specific features and problems of numerical modelling applications in mining environment are briefly discussed and three modelling case studies are presented. Two of the applications are aimed at mine dewatering problems in active coal mines. The first represents the underground hard coal mining region in the Czech part …

The study presents an approach to analyze the effect of mining induced seismicity on a closed deep underground Kolar Gold Fields mine combining both numerical modelling …

A recent study published in Mining effectively illustrates the advantages of numerical modeling in analyzing a rock engineering problem involving deep mining excavations facing high-stress challenges. The objective was to gain insights into stress concentrations, potential failure mechanisms, and deformation around the excavations.

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.

Four main types of numerical models can be used in rock engineering numerical modelling: the discrete element method (DEM), the finite element method …

Geomechanical assessments of lonGwall workinG stability-a case study the stability of longwall mining is one of the most important and the most difficult aspects of underground coal mining. the ...

The site of the Disturbance and Recolonization Experiment (DISCOL) in the Peru Basin in the southeast Pacific Ocean was chosen as a case study. The model includes the actual bathymetry, as well as the characteristic flow patterns of this region.

Numerical Modelling of Mining Induced Seismicity in Deep Closed Mines: A Case Study. June 2022. DOI: 10.1007/978-981-16-9770-8_28. In book: Proceedings of …