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surface subsidence due to underground mining

Surface subsidence due to underground mining operation under weak ...

Surface subsidence due to miming operation often becomes a big issue in underground coal mines. Cave-in due to mining operation often occurs at shallow mining depth, especially this phenomenon occurs remarkably during the rainy season.

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Prediction of mining-induced surface subsidence and ground movements at ...

Underground mining operations cause stress redistribution as a consequence, this causes some induced displacements on the ground surface. One of the consequences of this is cave-in which could lead to loss of life, materials and man hour.

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Surface Subsidence Analysis Due to Longwall Underground Coal Mining ...

since October 2009, longwall underground coal mine method however should now be applied to keep the mine in operation and this is due to environmental constraints. It has been well accepted that the application of longwall underground coal mine may expect surface subsidence. Since most of the surface area is made use of farm land,

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Concurrent mining and reclamation for underground coal mining ...

eBook ISBN 9781315166582 ABSTRACT Large scale underground mining of coal resources in China using longwall mining has resulted in ecological and environment problems, including surface subsidence that is considered serious due to competing interests of prime agricultural lands, food security, and regional economic development.

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Prediction of subsidence due to underground mining by artificial neural ...

The knowledge about the surface activity caused by mining, and the prediction of subsidence enable efficient repairs of the mining damage, and has a positive impact on the economic results of mining. Accurate and reliable prediction can, beside other factors, influence significantly the strategy of the operation of a mine.

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Surface subsidence due to underground mining operation under weak ...

The following results can be drawn from the above analysis: (1) If the subsidence is affected by room-and-pillar mining, the amount of predicted subsidence is 1.45 m. (2) If the subsidence is notaffected byroom-and-pillar mining, the amount of predicted subsidence is 1.09e1.23 m with the dif- ferenceof only7.4%.

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Land Subsidence | U.S. Geological Survey

Land subsidence is a gradual settling or sudden sinking of the Earth's surface due to removal or displacement of subsurface earth materials. The principal causes include: aquifer-system compaction associated with groundwater withdrawals drainage of organic soils underground mining

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Enhancing Mine Subsidence Prediction and Control Methodologies for Long ...

Metadata. Prediction and control methodologies for ground deformation due to underground mining (commonly referred to as mine subsidence) provide engineers with the means to minimize negative effects on the surface. Due to the complexity of subsidence-related movements, numerous techniques exist for predicting mine subsidence behavior.

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Minimizing Impacts on Streams due to Underground Mining by Predicting ...

Published studies cite three major mechanisms of subsidence as most likely to impact streams: displacement, slope and strain. ... (Iannacchione, et. al., 2010).Recent investigations on the effects of underground mining on surface bodies of water suggest that to determine the degree of stream impact one must also consider the geologic structure ...

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The Actual Difference Between Surface and Underground Mining

Minerals Extracted. Surface mining is commonly used to extract coal and copper, and increasingly, precious metals like gold. Underground mining is used for gold, platinum, zinc, lead, and increasingly, coal. As can be seen, surface mining is much more advantageous than its counterpart. However, when an outcropping ore body stretches deep inside ...

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Assessment Model of Strata Permeability Change Due to Underground ...

It states that the extraction of an elemental area of an underground coal seam will cause surface to subside in a particular manner. For level or moderately inclined coal seam, the surface point located directly above the extracted element receives the most amount of subsidence.

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Prediction Of Surface Subsidence Due To Inclined Coal Seam Mining Using ...

Aug 15, 2022Subsidence is an undesirable consequence of underground mining in many countries. It can cause environmental damage and harm surface structures in the mine area. There are many methods for prediction of surface subsidence due to mining activities. Prediction of subsidence due to inclined coal seam working is complicated for non-symmetric nature ...

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Surface subsidence due to undergr... preview & related info - Mendeley

Abstract. Subsidence analysis and prediction with measured data have been conducted and applied to local strata and mining conditions worldwide. Underground coal mines chose the most suitable analysis and prediction method for them. However, there was no study based on the measured data of subsidence induced by underground mining operation in ...

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Model for the prediction of subsurface strata movement due to ...

Movements of strata over coal seams can be caused by underground activities, e.g. tunneling, mining, etc. Vertical displacement in each stratum can develop in an upward manner from the stratum adjacent to the coal seam to the surface. Hence, it is well known that there are strong links between subsurface and surface subsidence movements.

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Prediction of mining-induced surface subsidence and ... - ScienceDirect

Subsidence is the downward settlement of the ground surface. Mining-induced surface subsidence is a phenomenon that occurs due to the underground extraction of an orebody. Open pit and underground mining operations cause stress redistribution; consequently, this causes some induced displacements on the ground surface.

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Time function model of dynamic surface subsidence assessment of grout ...

1.Introduction. Coal-mining-induced surface subsidence is a complex spatiotemporal phenomenon. With the progressive mining of the working face, the surfaces of the affected areas undergo three stages of subsidence, namely, initial subsidence, active subsidence, and residual subsidence. 1 Initial subsidence generally only accounts for 10-15% of the final subsidence and causes minor ground ...

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Prediction of Surface Subsidence and Deformations Due to The ...

The surface subsidence and its harmful effects on infrastructures above mining operations is a serious problem resulting from the underground coal mining in min-ing basins. The inevitability of conse-quences for objects on the terrain surface can be related to the conditionality of the mine location. Deposits of mineral raw

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NIOSHTIC-2 Publications Search - 10000956 - Subsidence Due to ...

The report gives a review of the methods of predicting mine subsidence; these methods are used particularly in European coalfields. The methods are subdivided into two groups, based on mathematical expressions either for the trough profile or for the influence of infinitesimal extraction elements.

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Research Article Study of Surface Subsidence due to Underground Opening ...

Determination of the extent of surface subsidence due to underground mining is important for deciding whether a particular structure is located within the subsiding area or not. The area affected by subsidence is controlled predominantly by Thammasat International Journal of Science and Technology Vol.20, No.2, April-June 2015 54

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"An integrated computer model for predicting surface subsidence due to ...

This dissertation is a part of the results of a research effort. The objective of the research was to develop a reliable, comprehensive and easy-to-use computer model for predicting surface movement and deformation induced by underground coal mining. The subsidence prediction model developed is capable of (1) predicting the final subsidence on a flat or moderate surface; (2) predicting the ...

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Overburden Movement Due to Underground Mining - OneMine

If not properly planned it causes surface subsidence and affects surface environmental conditions. Total extraction usually refers to longwall mining and room and pillar mining with pillar extraction. ... Based on the above observations, the author developed a conceptual model of overburden movement due to underground longwall mining (Fig. 1.5).

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Subsidence due to underground mining (in two parts). Part 2. Ground ...

Ground movements and mining damage. Subsidence due to underground mining (in two parts). Part 2. Ground movements and mining damage. Full Record; Other Related Research; Authors: Brauner, G Publication Date: Mon Jan 01 00:00:00 EST 1973 Research Org.: Denver Mining Research Center, Colo. (USA)

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Prediction of Surface Subsidence Extension due to Underground Caving: A ...

Surface subsidence due to underground mining is commonly observed in caving-based construction projects (Figure 1 ), the shape of which is composed of long or circular shape generally. The associated surface destruction endangers construction near the subsidence zone [ 1, 2 ]. Figure 1

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Development of GIS-based Analytical Method for Predicting Mining Subsidence

ABSTRACT: Surface subsidence due to underground mining is a major problem, especially when stratified deposits are completely extracted. Extensively theoretical, laboratory and in situ test investigations have been carried out in many countries to develop mining subsidence prediction techniques.

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coal mining - Underground mining | Britannica

In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata. Access to the coal seam is gained by suitable openings from the surface, and a network of roadways driven in the seam then facilitates the installation of service facilities for such essential activities as human and ...

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Evaluation of Surface Subsidence Due to Inclined Coal Seam Mining: a ...

the surface caused by underground coal mining. Figure 8 shows that the inclined angle subsidence numerical model was established, in which the dip ... parameters on surface subsidence due to longwall mining. Bulletin of Engineering Geology and the Environment, 80(3), 2751-2764.

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Mine Subsidence Definitions - Ohio Mine Subsidence

Subsidence, in the context of underground mining, is the lowering of the Earth's surface due to collapse of bedrock and unconsolidated materials (sand, gravel, salt, and clay) into underground mined areas. Pit (sinkhole/pothole) subsidence is characterized by an abrupt sinking of the surface, resulting in a circular steep-sided, craterlike ...

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Prediction of subsidence due to underground mining by ... - NASA/ADS

Prediction of subsidence due to underground mining by artificial neural networks. Alternatively to empirical prediction methods, methods based on influential functions and on mechanical model, artificial neural networks (ANNs) can be used for the surface subsidence prediction. In our case, the multi-layer feed-forward neural network was used ...

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Accepted Manuscript - ResearchGate

Surface subsidence due to miming operation often becomes a big issue in underground coal mines. Cave-in due to mining operation often occurs at shallow mining depth, especially this phenomenon...

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Prediction of subsidence due to underground mining by artificial neural ...

Alternatively to empirical prediction methods, methods based on influential functions and on mechanical model, artificial neural networks (ANNs) can be used for the surface subsidence prediction. In our case, the multi-layer feed-forward neural network ...

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Numerical Modeling Of Ground Subsidence Due To Mining

Among the analytical/numerical methods, the finite element method (FEM) has emerged as a powerful tool for prediction of surface subsidence due to underground mining. In this study, an improved two-dimensional finite element procedure is developed to predict ground subsidence caused by underground mining.

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Application of Machine Learning in Forecasting the Impact of Mining ...

Aug 2, 2022Ground surface displacements due to mining activity are observed regardless of the mining method (underground, surface or borehole). ... X. Application of the Improved Knothe Time Function Model in the Prediction of Ground Mining Subsidence: A Case Study from Heze City, Shandong Province, China. Appl. Sci. 2020, 10, 3147.

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VIII. Potential Impacts from Underground Mining

mechanics of mine subsidence. Mine subsidence can be defined as movement of the ground surface as a result of readjustments of the overburden due to collapse or failure of underground mine workings. Surface subsidence features usually take the form of either sinkholes or troughs.

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Surface Mining - Agapito Associates, Inc.

Agapito Associates, Inc. (AAI) offers integrated capabilities in geology, economic planning and development for surface mining operations. The AAI staff offers over 30 years experience in the energy industries, industrial minerals, aggregate/construction operations and metal mining. Our staff continued to provide state-of-the-art services for ...

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Prediction of surface subsidence and deformations due to the ...

Throughout its historical development, mining has faced the problem of moral and material responsibility due to various types of endangerment and damage to the environment. As a result of the underground coal exploitation, a movement of the rock massif above the coal seam, and changes on the terrain surface due to the process of massif stabilizing take place. The process occurs in space and ...

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Underground Mining Methods and Equipment - EOLSS

surface is termed underground mining. Underground mining methods are usually employed when the depth of the deposit and/or the waste to ore ratio (stripping ratio) are ... Surface subsidence is inevitable and must be allowed for in the case of sublevel and block caving. Production must be maintained at a steady and continuous level to

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Surface Subsidence Monitoring Induced by Underground Coal Mining by ...

In this paper, we propose a method to combine them to monitor surface subsidence deformation in mining areas. This approach complements the advantages of the two technologies to comprehensively monitor and analyze the surface subsidence of mining areas. 2. Study Area and Datasets 2.1. Study Area

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using multilayer feed-forward artificial neu ral networks and back ...

time [11-13]. However, the ground surface subsidence due to underground mining is a complicated process, and it cannot be fully described by the Knothe function, so the accuracy of subsidence prediction is not rather high in some cases [12, 14]. To overcome this problem, several extension forms of Knothe function were proposed [13, 15],

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Government regulation of subsidence due to underground coal mining and ...

The regulations developed included a subsidence control plan, provisions for establishing performance standards for subsidence control, and prohibition of mining under various conditions. In 1980 the courts ruled against industry challenges and again, after a second appeal, upheld the subsidence regulation.

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Subsidence - Abandoned Mines In Pennsylvania

One of the ill effects of under-regulated mining is subsidence. "Ground subsidence" is a downward displacement of surface materials caused either by natural phenomena (removal of underground fluids, dissolution of underground minerals) or by man-made phenomena (underground mining). Subsidence may occur instantly or gradually over time.

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