Are open-cast coal mines casting a shadow on the Indian environment?

2008 ◽  
Vol 30 (4) ◽  
pp. 441-459 ◽  
Author(s):  
Urmila Jha-Thakur ◽  
Thomas Fischer
Keyword(s):  
Coal Mines ◽  
Open Cast

Air quality at open-cast coal mining regions at Hunter Valley, Australia and Ramagundam, India

2021 ◽  
Author(s):  
Harsh Kamath ◽  
Chanchal Chauhan ◽  
Sameer Mishra ◽  
Aariz Ahmed ◽  
Raman Srikanth
Keyword(s):  
Power Plants ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Meteorological Data ◽  
Thermal Power ◽  
Coal Mines ◽  
Export Market ◽  
P Value ◽  
Open Cast ◽  
Monitoring Stations

<p>The upper Hunter Valley region in New South Wales (NSW), Australia has several open-cast coal mines, which supply coal to two large thermal power plants (TPPs) in the area, beside the export market. Long-term Particulate Matter (PM) pollutants and meteorological measurements are recorded by a network of 13 NSW government-owned continuous monitoring stations in the upper Hunter Valley region. The Ramagundam area in the state of Telangana, India has similar pollution source characteristics (coal mines and TPPs), but PM pollutant measurements are largely carried out with manual monitoring stations at 24-hour intervals, not more than twice a week. As the coal and overburden excavation from open-cast coal mines and stack emissions from TPPs lead to local PM pollution, we have used MODIS-MAIAC Aerosol Optical Depth (AOD) at 550 nm and Normalized Difference Vegetation Index (NDVI) along with the local meteorological data such as ambient temperature, relative humidity, wind speed and direction to model PM10 and PM2.5 at the upper Hunter Valley and Ramagundam regions. Our model can explain about 60% of variation in PM10 (p-value < 0.0001), while a similar model is able to explain about 75% of the variation in the PM2.5 (p-value < 0.0001). We will extend our model results from Hunter Valley to Ramagundam area and comment on the potential of using geospatial products such as AOD as a proxy to ground-based pollution measurements in developing countries such as India, where pollution data is scarce.</p>

scholarly journals Increasing Labor Efficiency Repairing Metal Structures of Heavy-Duty Quarry Machinery

2019 ◽  
Vol 105 ◽  
pp. 03005
Author(s):  
Michael Drygin ◽  
Nikolai Kuryshkin
Keyword(s):  
Fatigue Cracks ◽  
Coal Mines ◽  
Repair Process ◽  
Specific Rate ◽  
Metal Structures ◽  
Industrial Experiment ◽  
Repair Processes ◽  
Spring Plate ◽  
Dump Trucks ◽  
Open Cast

Supporting metal structures of large dump trucks at open cast coal mines function under exposure to alternating cyclic load. Fatigue cracks that appear there require timely maintenance welding. Organization of repair processes is multivariant; it can be performed either by the enterprise (open cast coal mine) efforts or by special repair units. An industrial experiment carried out at Permyakovskiy and Prokopyevskiy open cast coal mines in Kuzbass has shown that type of large dump trucks’ repair works organization influences significantly process efficiency. Repair welding by enterprise efforts is the most non-productive compared to other types of repair process organization. Its specific rate is 37 per cent lower than in comparison with unstructured welding and 2.2 times lower in comparison with structured metal sheet replacement and structured welding. Structuring repair processes allows to increase their efficiency by 30...40 per cent on average. Structured replacement of the spring plate is the most productive type of metal structure repair process organization. Comparison of maintenance measurement results in accordance with Unified Norms and Prices collected book with the results obtained from the industrial experiment showed that calculation methods give underestimated values of repair processes’ specific rate.

scholarly journals Technological, economic and social aspects of the provision of solid fuels to the Arctic regions of Yakutia

2020 ◽  
Vol 192 ◽  
pp. 03001
Author(s):  
Sergye Tkach ◽  
Natalya Batugina ◽  
Vladimir Gavrilov
Keyword(s):  
Coal Mines ◽  
The Arctic ◽  
Hard Coal ◽  
Small Scale ◽  
Economic Management ◽  
Open Cast Mining ◽  
Arctic Regions ◽  
Coal Deposits ◽  
Important Direction ◽  
Open Cast

The article examines the reasons leading to the increase in the price of fuel and energy resources consumed in the Arctic regions of the Yakutia. The paper studies the conditions for the development of coal deposits in the region. It is shown the lack of open cast mines that meet modern criteria for efficient use of small-scale open mining by quality and logistic accessibility. This article determines that with the minimum level of clogging of the hard coal mined and the stabilization of its quality over time, it is possible to efficiently recycle the fuel without other precombustion measures. In the case of development of brown coal deposits, additional enrichment is required after extraction to improve the level of consumables. The paper stresses that development of local small-scale deposits of coal is important direction to improve energetic safety of arctic regions. It is necessary to select the coal mines most suitable for open-cast mining, as close to consumers and also with the best quality indicators. The use of the specified measures of technological and economic management, administrative regulation and improvement of mechanisms of «northern delivery» make it possible to facilitate the creation and operation of new coal mines in the Arctic zone of Yakutia. In turn, this reduce coal delivery periods, its quantity and quality losses in the supply chain, and improve local fuel and energy complexes.

scholarly journals Consultations of children living near open-cast coal mines.

2001 ◽  
Vol 109 (6) ◽  
pp. 567-571 ◽  
Author(s):  
D Howel ◽  
T Pless-Mulloli ◽  
R Darnell
Keyword(s):  
Coal Mines ◽  
Open Cast

scholarly journals Construction of Dry Cover System for Prevention of Acid Mine Drainage at Mine Waste Dump in Open Cast Coal Mines, Indonesia

2016 ◽  
Vol 07 (02) ◽  
pp. 160-169 ◽  
Author(s):  
Shinji Matsumoto ◽  
Hideki Shimada ◽  
Takashi Sasaoka ◽  
Ginting J. Kusuma ◽  
Rudy S. Gautama
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Mine Waste ◽  
Coal Mines ◽  
Waste Dump ◽  
Cover System ◽  
Acid Mine ◽  
Dry Cover ◽  
Mine Waste Dump ◽  
Open Cast

scholarly journals Securing Topsoil for Rehabilitation Using Fly Ash in Open-Cast Coal Mines: Effects of Fly Ash on Plant Growth

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Shinji MATSUMOTO ◽  
Akihiro HAMANAKA ◽  
Kaito MURAKAMI ◽  
Hideki SHIMADA ◽  
Takashi SASAOKA
Keyword(s):  
Fly Ash ◽  
Plant Growth ◽  
Industrial Waste ◽  
Coal Mines ◽  
Acacia Mangium ◽  
Environmental Conservation ◽  
Mixing Ratio ◽  
Mixing Ratios ◽  
Plant Body ◽  
Open Cast

Rehabilitation is an important stage in mining operations for environmental conservation. However, the shortage of topsoil makesit difficult to achieve rehabilitation in open-cast coal mines. Securing topsoil by mixing soil with fly ash (FA), which is treated asan industrial waste, is expected to solve this issue in coal mines. While mixing soil with FA makes it possible to secure the topsoiland treat industrial waste simultaneously, the high alkalinity of FA and the dissolution of heavy metals from FA may inhibit plantgrowth. This study investigated the effects of FA in the topsoil on plant growth via vegetation tests with simulated topsoil mixedwith FA using Acacia mangium, a species of flowering tree: the FA mixing ratios were set to 0%, 20%, 40%, 60%, and 100%. Thegrowth of Acacia mangium was inhibited with increasing FA mixing ratio, especially from 60% to 80%. However, the growth rate ofAcacia mangium in an FA mixing ratio of 100% was nearly comparable to that in a mixing ratio of 40%. Furthermore, there wereno effects of the physical characteristics and pH conditions in the topsoil on the plant growth at any of the mixing ratios; meanwhile,the accumulated concentration of Al in the plant body increased significantly at an FA mixing ratio of 60%–80%. This suggeststhat the accumulation of Al, which inhibits plant growth, including root growth and its functions, in the plant body inhibited thegrowth of Acacia mangium. Therefore, the most important aspect in terms of rehabilitation concerning the use of FA for securingtopsoil is not the mixing ratio of FA but the amount of Al in the FA and the accumulation of Al in the plant body.

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