geomechanical processes at closed mines in

geomechanical processes at closed mines in

Mining for Closure: Policies and Guidelines for Sustainable

To accommodate the need to close abandoned mines and to ensure that existing and future mines are appropriately closed will require the cooperation of a diverse stakeholder community, new and innovative methods of financing closure and major policy and legislative change in most nations to ensure post-mining sustainable development, Clark et al

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Biomediated Geomechanical Processes for Dust Mitigation

Associate Professor Eric Seagren (CEE/SFI) and CoPIs Assistant Professor Thomas Oommen (GMES/SFI) and Associate Professor Stan Vitton (CEE/SFI) have received $202,912 from NSF for a three-year project, “Biomediated Geomechanical Processes for Dust Mitigation and Monitoring at Mine Tailings Impoundments.”

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Geomechanical processes at closed mines in Donbass

Geomechanical processes at closed mines in Donbass coalfield and their potential effects at surface December 2002 Transactions of the Institution of Mining and Metallurgy, Section A: Mining

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Coupled hydraulic and mechanical model of surface uplift

The results provide a valuable understanding of the potential geomechanical impacts of mine water heat schemes which abstract or inject water and heat into pillar-and-stall coal mine workings. The simulated uplift is a precursor to understanding the stress in the overburden and underburden at the pillars due to the superposition of the mechanical, thermal and hydraulic

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110 Heterogeneous Geomechanical Properties

Surface mining technology is used to extract and produce oil reserves which are close to the surface (<65m), however about 80% of the oil sands are below economical open pit mining depth. This oil must be recovered by in situ recovery techniques including Steam Assisted Gravity Drainage (SAGD), Cyclic Steam Stimulation (CSS) and 4 por Extraction (4&PE7. With the

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Geomechanical Processes during Underground Mining | UK

This volume deals with economic aspects of mining companies development strategies, various mineral deposits development techniques, imitational modeling of mine workings with rock massif, methane extraction technologies during coal mining, geomechanical processes during plow mining, mining transport importance for mineral extraction, massif

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Geomechanical effects of operation and closing the Idrija

backfilling works in the mine. Time-dependent processes which are closely linked to the extent of ore exploitation and the type of mining methods, which were used in the past, and in particular to the geological and geomechanical conditions, are still present.

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Parallel simulation of rock deformation processes

With the transition of mining operations to the region of great depths (significantly lower than the gas weathering zone), external and internal factors related to the coal layer, which cause the occurrence of GDH are likely to change. In this aspect, the most careful attention should be paid to the geomechanical processes occurring in the

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Slope Design and Implementation in Open Pit Mines

Slopes of mines and quarries, some of which may reach several hundred meters deep, must be regarded as “geotechnical works” in the sense that we speak of mine works or civil engineering works. Their design and their implementation must be conducted according to rules of art with the general objective to define the geometry that will ensure the safety of the

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Modeling of Hydraulic and Geomechanical Processes around

An analysis is performed for the influence exerted by hydrostatic and hydrodynamic forces on the effective stresses governing the deformation processes in driving the mine workings. The numerical algorithm is proposed for investigating the joint action of geomechanical and filtration forces.

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Publications - Fracturing, Acidizing, Stimulation Technology

Reservoir and geomechanical properties for certain stages of the horizontal wellbore were altered from the base model to address the effect of rock quality lateral variations. Four scenarios of 57 ft, 76 ft, 100 ft, and 142 ft spacing between perforation clusters were investigated to address the effect of stress shadowing.

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GEOMECHANICAL PPT | Young's Modulus | Stress (Mechanics

Fundamental Geomechanical Properties and Processes 4. Correlation Between Static and Dynamic Moduli 5. Application OVERVIEW Geomechanical rock properties are a specific group of petrophysical parameters, directly measured in rock mechanics laboratories or by specific field tests.

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The Role and Importance of Geotechnical Engineering for a

Geotechnical Room for Improvement in Mine Design. Mine design at a mine project study stage is based on the information available at the time the study is carried out. It is recognized that during this stage there is usually limited detail of the overall rock mass available and that it is necessary to make a number of assumptions.

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Physical stability of iron ore caves: geomechanical

Geomechanical studies in caves and mining environment have been conducted in many areas of the world (e.g. Klimchouk & Andrejchuk, The cave is located very close to the surface, where a very strong canga crust prevails, providing good conditions of self-support to the ceiling. The second proposed domain was the prevailing compact hematite (hematitite). The main feature

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USE OF VOID SPACE IN ABANDONED MINES IN THE UPPER SILESIA

A) (situation possible in active or in closed mine) B) Figure 3. Models of use of free voids as a protection against water hazard (after Bukowski et al., 2006): A) Closed mine with well drainage, B) Active or closed mine with in-mine drainage. In the mines where excavations are dewatered by wells, special depth ranges (working and emergency) are

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Responsible Mine Closure & Reclamation - Teck Resources

development, mining, reclamation, safety, environmental protection and research. Over our 100-year history, we have learned that responsible mining and mineral development are fundamental to our long-term success.

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Coupled Geomechanical and Reactive Geochemical Simulations

the geomechanical and geochemical processes for EGS reservoirs. The research efforts have been put in this direction and a few EGS reservoir simulation tools are developed. For example, Rutqvist et al. (2002) linked TOUGH2 (Pruess et al., 1999) and FLAC3D for modeling of THM process. Wang and

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Mine flooding – Mine Closure - Mine Closure – Mine Closure

Mine flooding. Samrit Luoma 1 & Kaisa Turunen 2, 1 Geological Survey of Finland, P.O. 96, FI-02151 Espoo, FINLAND, 2 Geological Survey of Finland, P.O. Box 1237, FI-70211 Kuopio, FINLAND, e-mail: samrit.luoma(at)gtk.fi, kaisa.turunen(at)gtk.fi. Introduction. During mining operation, the precipitation and infiltrating groundwater will be pumped out from the mine pits and

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An earth pressure coefficient based on the geomechanical and

Dec 11, · The backfilling of underground stopes in mines has become common practice in the mining industry as it increases the stability of mine excavations and reduces environmental problems. The backfilling process involves several technical aspects that must be assessed to ensure that the backfilling objectives are achieved. The horizontal stress exerted by backfill on excavation walls must be

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Coupled hydraulic and mechanical model of surface uplift due

Research into modelling mine water heat schemes has focused on heat extraction and flow transfer in mines ranging from analytical solutions to 3D numerical models. The inclusion of geomechanical processes in this research has meant a numerical solution is more appropriate than an analytical solution.

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Geomechanical issues in longwall mining

The process of roof cave-in includes fracturing of the rock, disintegration and (downward) movement. Above the roof three zones of disturbances in the overburden strata can be distinguished (Peng & Chiang 1984): a caving zone, a fractured zone and a con- tinuous deformation zone (Fig. 6). They differ mainly in the induced degree of dam- age.

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