Application of seismic velocity tomography in underground …
burst hazard detection using seismic velocity tomography, especially the passive seismic velocity tomography (Banka and Jaworski, 2010; Gong, 2010; Lurka, 2008). Meanwhile, few studies in a comparison of the active seismic velocity tomography with a passive source image calculated with mining-induced tremors (Maxwell and Young, 1993) can be found.
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seismic velocity in iron mines in goa india
seismic velocity in iron mines in goa2c india Know More. seismic velocity in iron mines in goa2c india home;, case study, an Iron ore mine in Goa (India) is considered This case study will show the implementation and the impact of the EIA 1) Site Location The Gotukwadecho Tembo Iron Ore Mines is located at Collem village of SanguemTaluka of south …
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Ministry of Coal, GOI
Coal mining, world over, is highly regulated industry due to presence of many inherent, operational and occupational hazards. Coal Mine Safety Legislation in India is one of the most comprehensive and pervasive statutory framework for ensuring occupational health and safety (OHS). Compliance of these safety statutes is mandatory.
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Stress-Release Seismic Source for Seismic Velocity Measurement in Mines ...
Accurate seismic event locations are needed to delineate roles of mine geometry, stress and geologic structures in developing rockburst conditions. Accurate absolute locations are challenging in mine environments with rapid changes in seismic velocity due to sharp contrasts between individual layers and large time-dependent velocity gradients attending excavations. …
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Time-lapse Passive Seismic Velocity Tomography of Longwall Coal Mines …
Time-lapse passive seismic velocity tomography was conducted utilizing data from three underground longwall coal mines to produce a better understanding of the processes that lead to ground failure in mines, especially large, violent failures, such as bumps. Two of the datasets, US Western I and US Western II, were collected at bump-prone underground longwall coal mines …
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COAL MINING IN INDIA : AN OVERVIEW - Energy.gov
Coal : Prime Source of Energy in India ¾Coal is the most abundant fossil fuel resources in India ¾Coal is the key contributor to the Indian energy scenario. ¾55% of the current total commercial energy needs is met by coal. ¾By 2024-25, the share of coal would come down marginally to about 50% of the total energy needs.
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Seismic Velocities of Rocks and Various Materials
Seismic Velocities of Rocks and Various Materials. Material. P-wave (m/s) S-wave (m/s) Air. 343. N/A. Water. 1450 - 1500.
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Government of India Ministry of Coal
Agenda for the Year 2021-22 II Coal Transition & Sustainability 7 31-43 1 Social aspects of coal transition JS (P&S) with DDG 32 2 Monetization of de -coaled land EA 33 3 Use of Artificial Intelligence (AI) in data mining/drones DDG & Advisor (P) 34-40 4 Sustainability (Net Zero Emissions) JS(P&S) 41-43 III Institution building 44-49 1 Reforms in Coal Controller …
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Improvements in Seismic Event Locations in a Deep Western …
L 1 norm. The L 1 norm was se lected over the least-squares norm L 2 as it is much less sensitive to the effects of large errors in outlier data[10].L 1 is given by: m ˆ ˆ n Lv obs theor 1 (, h ) = ¦¦t ij −t ij (1) i=1 j =1 where vˆ is the vector of velocity model parameters; hˆ vector of seismic sources parameters (coordinates and origin times); number of seismic events; n m
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Case study of seismic hazard assessment in underground …
and rock bursts are the main safety threats in underground coal mining. The face was monitored continuously by microseismic network for 8 months. Thus, the site has considerable microseismic activities, making it ideal for passive tomographic imaging of high seismic activities during mining process. 2. Velocity tomography for seismic hazard ...
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QUANTITATIVE COMPARISON OF SEISMIC VELOCITY …
seismic activity is present the event arrival times at each geophone, the locations of each geophone, and the three dimensional velocity model are used in conjunction with one another to locate the seismic events. This research compares the locations of seismic events from a deep coal mine longwall
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Induced seismicity of Indian coal mines - ScienceDirect
The present study aims at presenting some of the investigations of seismic- ity associated with the Indian coal mines. 3. Seismicity Most of the collieries mining the Raniganj coal seam show induced seismicity on account of min- …
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seismic velocity in iron mines in goa india
According to a study of the world iron ore industry by the Brussels-based International Iron Steel Institute (IISI), a production of over 86 MT of iron ore is envisaged in 2005. The Geological Survey of India (GSI) survey indicates that given the current intensity of mining, Goa's ore reserves are expected to peter out by 2020 A.D.
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seismic velocity of coal in indian mines
· Seismic velocity tomography can be implemented to infer stress distribution at mines and determine when a dangerous situation is developing. Three different methods were employed to compare time-lapse passive seismic tomograms at a longwall coal mine. The dataset is [PDF] Time-lapse Passive Seismic Velocity Tomography of ...
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Application of seismic velocity tomography in underground coal mines…
A better understanding of geological structures, stress regimes, and rock burst risks around longwall mining panels can allow for higher extraction efficiency with reduced safety concerns. In this paper, the stress change of rock mass was first examined by using ultrasonic technique into laboratory-scale rock samples. Subsequently, the active and passive seismic velocity …
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seismic velocity in iron mines in goa, india
processing equipments used in india coal mines ... 20 of 78 minerals mining equipment prices india seismic velocity in iron mines in goa, india mining screen Coal ... Know More. photos of iron ore mining equipment in goa mines ... Times of India Goa iron ore mines profile on Times of India. to Rs data on coal production by . used iron ore ...
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Seismic Velocity Of Coal In Guyana Mines
Peak Particle Velocity As An Indicator Of The. were continuously measured for 78 days in the deep seismic-prone coal mine Bobrek. The mine tremor of seismic energy E 3E5 J (local magnitude, ML2) and E 8E3 J (local magnitude, ML 1.1) located close to the tested roof support induced peak particle velocity weighted over 25 Hz, PPVw 0.110 m/s and PPVw 0.046 m/s.
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Application of seismic velocity tomography in underground coal mines ...
Application of seismic velocity tomography in underground coal minesword,:JournalofAppliedGeophysics109(2014)140 ...
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seismic velocity in iron mines in goa, india
NIDM Goa. Nov 25 32 Goa River Profile the velocity gets reduced and mining reject which is The pact is to be sealed between the Governments of Goa India and drying ball mill iron ore india equipment machine for drying iron concentrate seismic velocity in iron mines in goa india vertical mills velocity profilepiffiber important role in transport of minreal ores from the mining …
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Prediction of Fractures in Coal Seams with Multi-component Seismic Data
With multi-component seismic data, Brodic et al. predicted fracture systems by mode-conversions 28. With the increase in the depth of coal mines, P-wave exploration alone is likely to produce ...
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(PDF) Applying real time seismic monitoring technology
The mining operations carried out underground The preliminary results obtained from the seismic monitoring below the monitored slope are not intensive to cause neither any technique employed to assess the stability of highwall slope in effect on the pre existing geological structures along highwall an Indian opencast coal mine has been discussed.
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Monitoring Velocity Changes Caused By Underground Coal …
seismic noise measurement, Jas-Mos mine seismic network recorded 1500 events. Over 700 of them had energy higher than 103 J. Although seismic noise sources generated by mining longwalls in zones ZM, C3, W3 (Fig. 3d, boxes filled by straight lines) were out of the stationary phase for correlation analyses, their positions were stable over the ...
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Seismic velocity and rock properties
It is observed from seismic surveys that velocities generally increase with depth. Densities also increase with depth so it must be that the bulk and shear modulii increase faster than the density. In seismic exploration there are many empirical relationships between velocity and depth of burial and geologic age.
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Application of seismic velocity tomography in underground coal mines…
The active and passive seismic velocity tomograms were simultaneously applied on the longwall mining panels at the Yima Yuejin coal mine, Henan Province, China, and the ability of the seismic velocity tomography to illustrate geological discontinuity, stress redistribution, and rock burst hazard has been shown with two case studies and many of ...
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Estimates of stress in an underground coal mine determined from seismic …
An in-seam seismic survey was conducted in the Dutch Creek mine in the Coal Basin of Colorado. Seismic waves were transmitted under a gob produced by an advancing longwall panel. Stress levels were evaluated from seismic velocities in both the high velocity wall rock and in a coal seam located under the gob.
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Monitoring Velocity Changes Caused By Underground Coal Mining …
We use passive seismic interferometry to monitor temporal variations of seismic wave velocities at the area of underground coal mining named Jas-Mos in Poland. Ambient noise data were recorded continuously for 42 days by two three-component broadband seismometers deployed at the ground surface. The sensors are about 2.8 km apart, and we measure the …
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seismic velocity in iron mines in india
Seismic velocity in iron mines in goa, india . Seismic velocity in iron mines in goa, india,seive use iron . ash utilisation in haul road construction in open cast coal mines : of Seismic and Petrophysical Data of » Learn More. Assessment and Classification of …
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Acoustic properties of coal from lab measurement
Ultrasonic velocity measurement For coal samples (765, 766, 768, 771, 772), we measured 5 component velocities under "as is" and "water saturated" condition with a differential pressure range from 50 to 200 bar. For silty coal (769) and shale (770) samples, only pressure effect on Vp and Vs were measured. In Figure 2,
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Laboratory Measurements of Velocity and Attenuation in
recently, the measurement resolution of seismic velocities in the shallow subsurface had limited the use of the com-plete power of seismic attribute analysis in shallow soils. Recent advances in field techniques for seismic measure-ments in shallow soils (e.g., Bachrach et al., 1998; Bach-rach and Mukerji, this volume; Baker et al., 1999; Carr et
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seismic velocity in iron mines in goa, india
Sathupally, ... seismic velocity in iron mines in goa, india; coal mines in zambia; ruc mining south africa; problem encountered in coal mining industry in …
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seismic velocity of coal in indian mines - vumadesigns.co.za
COAL MINE SEISMICITY AND BUMPS: HISTORICAL CASE … mine-induced, non-bump, seismic events than there are documented coal bumps. In fact, the seismic network in Utah has found the most active seismic area since 1962 to be the vicinity of the active coal mining with hundreds of mining-induced events recorded each year (4). With this number of
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seismic velocity in iron mines in goa, india
An investigation on carbon dioxide sequestration in Indian coal seams, Integrated Interpretation of Seismic and Petrophysical Data from North Sea 3D, Mohamed Hydrose K, Slope Stability Analysis of an Iron Ore Mine Dump,Goa,India, the elastic constants of basalts by compressional wave velocity and density, 2013...
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seismic velocity of coal in indian mines
seismic velocity of coal in indian mines. Oct 01 2014 · In active seismic velocity tomography a pixel size of about 7 m per side was input into the program The average velocity of 245 kms and 275 kms was input as the initial velocity during the LW 25110 and LW 23070 inversions respectively and a maximum velocity constraint of 30 kms was ...
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Minerals | Free Full-Text | Integration of Seismic Refraction and ...
This paper considers the joint use of two popular geophysical methods (fracture-induced electromagnetic radiation and seismic refraction tomography) to assess the stress-state in underground mine-workings. Such a combination of two indirect methods allows the identification of zones of increased stress in the rock along the axis of the mine-workings, and zones of …
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Monitoring Velocity Changes Caused By …
Using causal and acausal parts of nine-component cross-correlation functions (CCFs) with a stretching technique, we obtain seismic velocity changes in the frequency band between 0.6 and 1.2 Hz. The nine-component CCFs are useful to stabilize estimation of velocity changes.
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