"1 i 1 1 subsidence due to underground mining ijser"

SUBSIDENCE » MiningPathsala Underground Mining

2021-7-19 · Subsidence:-. Lowering of ground surface is called subsidence. In mining field subsidence occurs due to extraction of any seam below ground. Subsidence area is much more than extracted area, as shown in figure. The point on the boundary up-to which subsidence reaches is known as the limit of s.

Sinkhole subsidence due to mining | SpringerLink

This paper reviews the modes of formation of sinkhole subsidence associated with mining activities, drawing on examples in India. Sinkhole (pot-hole) subsidence is an abrupt local depression at the surface which can be hazardous to life and property due to its tendency to occur without warning. Shallow extraction, weak overburden and geological discontinuities are the main factors which cause ...

ASSESSMENT MODEL OF STRATA PERMEABILITY …

2019-7-31 · 2.1. Development of prediction model for subsidence of overlying strata due to underground coal mining The prediction of surface migration and deformation in a coal mine has important significances to surface deformation and damage caused by the influence of mining in the process of reducing coal mining.

Background review

Background review: subsidence from coal mining activities Major underground coal mining in Australia mainly occurs in the coal basins of New South Wales and Queensland. Longwall is currently the most common method of underground coal mining in Australia, as it is safer and more efficient in extracting coal than other extraction techniques.

Underground mining (Journal Article) | OSTI.GOV

1990-5-1 · Abstract. This article deals with underground mining during 1989. Particular attention is given to longwall advances and rock mechanics. Authors: Luxbacher, G W [1] + Show Author Affiliations. Island Creek Coal Corp. (US) Publication Date: Tue May 01 00:00:00 EDT 1990.

Mine Subsidence in Indiana

2011-2-18 · Extent of subsidence . 1 Effects of subsidence . 1 ... 9 Cumulative production of coal by underground mining in Indiana 10 ... due to mine subsidence (Voight and Pariseau, 1970). Old subsidence or subtle subsidence can be more easily recognized in some places by

IDENTIFICATION AND MEASUREMENT OF MINING …

2010-11-10 · Interferograms with short temporal baseline ( interferograms 1 and 2; Tab.1) presents the fringe pattern of mining subsidence related only to a "differential effect" – i.e. the temporary velocity of subsidence instead of the subsidence trough elevations obtained with …

Underground coal mining and subsidence, channel …

Underground coal mining and subsidence, channel fracturing and water pollution: a five-year investigation Morrison KG1, Reynolds JK1 and Wright IA1 1 Western Sydney University, Locked Bag 1797 ...

Modeling-Assisted InSAR Phase-Unwrapping Method for ...

2020-5-14 · Compared with traditional measurement technologies, synthetic aperture radar interferometry (InSAR) has unique advantages in monitoring ground subsidence due to underground mining. However, when the subsidence gradient of the subsidence trough exceeds the maximum measurable gradient of InSAR technology, the interference fringes will be too dense, causing phase aliasing. As a result, it is ...

Disturbance mechanism of coal mining subsidence to …

2021-9-7 · OI: 1.32615/ps.22.72 HOTOSYNTHETICA 58 (5): 11781187, 22 1178 Disturbance mechanism of coal mining subsidence to typical plants in a semiarid area using O–J–I–P chlorophyll a fluorescence analysis Y. LIU *, S.G. LEI**,+, X.Y. CHEN, M. CHEN*, X.Y. ZHANG*, and L.L. LONG* The State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mine, …

Evaluation of subsidence due to underground coal mining ...

2011-9-1 · This paper presents a case study dealing with variations on the ground surface due to the underground mining activities in the Ostrava–Karvina Coal District (Czech Republic) over the last 25 years. During this period, some of the areas have experienced settlements of up to 11 m. Seven settlement intervals were used to indicate the varying degrees of subsidence over time. Maps were …

Research Paper Publishing

Surface subsidence due to underground mining is a frequent problem that mine surveyors normally deal with. When some indicators like ground cracks occur, it is necessary to have a quick assessment of surface subsidence. In this case, the similar zone method proposed by D. …

OF THE UNITED STATES f?fikEASED

2020-2-4 · METHODS FOR CONTROLLING SUBSIDENCE Mine subsidence can be controlled or avoided by: --Not mining the resource. ;1 --Mining the resource using techniques causing subsidence in a planned or cal- culated manner. --Mining the resource and leaving an adequate amount of coal for surface support. (See P* 3.1

Sinkhole subsidence due to mining | Semantic Scholar

SummaryThis paper reviews the modes of formation of sinkhole subsidence associated with mining activities, drawing on examples in India. Sinkhole (pot-hole) subsidence is an abrupt local depression at the surface which can be hazardous to life and property due to its tendency to occur without warning. Shallow extraction, weak overburden and geological discontinuities are the main factors which ...

Prediction of Surface Subsidence Extension due to ...

1. Introduction. 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].

1 I 1.1. Subsidence due to underground mining IJSER

2019-5-8 · 1.1. Subsidence due to underground mining . The mining industry is one of the main sectors contributing to the economy of Vietnam with a rapid increase in produc-tion year by year (N. Q. Long, 2016). The main coal basin of Vietnam is in Quang Ninh province. While underground mining

Hydraulic Stowing

Underground mining methods are used to extract coal from deep coal seams with an average recovery of about 50% of the mineable reserve in a property. Thus, approximately 50% of the mineable reserve is lost in the mining process. In fact, in farming areas, some additional coal is left in the coal pillars to prevent subsidence of the surface.

Assessment of Radar Interferometry Performance for …

Earth Planets Space, 60, 1–14, 2008 Assessment of Radar Interferometry Performance for Ground Subsidence Monitoring due to Underground Mining

Analysis of subsidence caused by underground mining ...

Some aspects of subsidence caused by longwall coal mining are analysed using the finite element method. Results of the analysis are compared with a true mine panel, where measurements on subsidence were available. Rock deformations in the overburden were modelled by using an elasto-plastic constitutive model. The study indicates that the shape of the subsidence profile can be …

Abstract– Key words – IJSER

2018-4-13 · 1 I NTRODUCTION Due to world economic crisis that has starting since 2008, there comes large number of abandoned mining sites which stopped before their excepted closure date. Obviously, do mining is not only license holders and governments'' business. It requires that

Numerical Modelling of Mining Subsidence

2015-5-18 · Subsidence due to the implementation of underground mining has caused significant damage to the environment. Subsidence is an important issue in the mining community and is caused largely by the longwall mining techniques employed to extract coal. Subsidence has always been associated with longwall mining, and has

Proposal of Open Pit Mining of Barapukuria Coal ...

2016-9-9 · Table 4: Mining-engineering parameters comparison for selection of mining method . Considering parameters Northern part Southern part Total/Average Result I.MINING PARAMETERS Calculated reserve (million tons) 93.189 52.426 145.615 1/3 of total reserve Recovery rate (million tons) Open pit mine Underground mine Depth of coal seam VI (m)

Prediction of sub-surface subsidence movements due to ...

The theoretical model of the relationship between sub-surface and surface subsidence movements proposed earlier by the authors of this paper is briefly described and further tested against another case history example. Using this model, the magnitudes of the maximum subsidence, tilt and horizontal strain at sub-surface horizons between the ground surface and seam level are predicted in terms ...

Surface subsidence due to underground mining operation ...

2015-6-1 · In this case, the mining at line 1 can be classified as a critical subsidence based on NCB SEH''s rule of critical subsidence as the ratio of advance/depth equals 0.7. Then 10% reduction of subsidence was applied due to the mining in the area according to the recommendation by NCB SEH. The subsidence of the point 1A is 1.45 m. (2)

THE CHARACTERISTICS OF SUBSIDENCE DUE TO …

Subsidence surveys are being carried out over areas of underground coal extraction in the Newcastle district, 160 km north of Sydney. The investigations in one area showed the development of the subsidence, slope and strain at the surface as the extracted area increased. The maximum principal strains were determined at various stages of extraction.

INTEGRATED SPACE GEODETIC TECHNIQUES FOR …

subsidence due to underground mining Linlin Ge 1, Chris Rizos 1, Makoto Omura 2 and Shigeki Kobayashi 3 1 School of Geomatic Engineering, University of New South Wales, Sydney, Australia

PIAHS

The application of Sentinel-1 SAR data for land subsidence induced by underground mining operation is described, using a combined InSAR SBAS and IPTA approach. The results show the rapid surface deformation (up to 70 cm per year) caused by the underground mining activity. The cumulative subsidence time series for each coherent point can be ...

2021-8-1 · An Overview of Subsidence Prediction Techniques Due to Underground Mining, Journal of China Safety and Technology, 2011, 7(10): 41-45 (in Chinese) Cheng, J. and Yang S. A Comprehensive Evaluation Model for Mine Ventilation System Based on Gray Cluster Analysis and Fuzzy Theory .

Workshop on Surface Subsidence due to underground ...

: Workshop on Surface Subsidence due to Underground Mining : : 1 Proceedings : Conference on Charge-Coupled Device Technology and ...

THE CHARACTERISTICS OF SUBSIDENCE DUE TO …

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Ground movements occur when fluids or minerals are mined from beneath the surface and a subsidence bowl or trough subsequently forms over the extraction. The characteristics of all subsidence bowls and troughs include the vertical and horizontal displacements of points on the surface, the change in the slope of the ...

GORDON GEOTECHNIQUES PTY LTD GORDON …

2021-4-20 · the Project Area, with access through the existing underground workings (Figure 1). The majority of the proposed mining layout in Zone 1 is located below the flood plain of the Nogoa River (Figure 1). Zone 2 and Zone 3 are located both below the flood plain and outside the flood plain (Figure 1). 1.2 Project Setting Due to the overlying Nogoa ...

DIFFERENTIAL RADAR INTERFEROMETRY FOR MINE …

2010-11-10 · The need of subsidence monitoring in underground mining is multi-fold: • Legislation, • Subsidence Prediction, • Maximise Coal Extraction, • Structural Design, • Risk Management, and • Environmental Monitoring. Therefore, ground subsidence due …

An initial assessment of the impact of coal mining on the ...

2019-5-7 · 1 INTRODUCTION 1.1. Subsidence due to underground mining The mining industry is one of the main sectors contributing to the economy of Vietnam with a rapid increase in produc‐ tion year by year (N. Q. Long, 2016). The main coal basin of Vietnam is in …

Impact of ground surface subsidence due to underground ...

2019-7-13 · Ground surface subsidence as the result of the application of caving methods (block caving, sublevel caving and longwall mining) may leave significant impact on surface infrastructures which are located in subsidence influence zone. The Anomaly No. 12 Sechahun located in 32 km from Bafq in Yazd province, Iran was planned to be extracted by sublevel caving method. Evaluating the amount of ...

Subsidence from Underground Mining: Environmental …

2010-10-30 · Subsidence from Underground Mining: Environmental Analysis and Planning Considerations By F. T. Lee and J. F. Abel, Jr.1 ABSTRACT Subsidence, a universal process that occurs in response to the voids created by extracting solids or liquids from beneath the Earth''s surface, is controlled by many factors including

Fact sheet

MSEC, 2007. Introduction to longwall mining and subsidence. Unpublished report, Mine Subsidence Engineering Consultants. NSW Department of Planning (2008) Impacts of Underground Coal Mining on Natural Features in the Southern Coalfield: Strategic Review, …