Results 21 to 30 of about 357,318 (209)
Assessment of mining activities with respect to the environmental protection [PDF]
, 2017 This paper deals with the impact of mining on the environment. Coal mining is still among the most widespread and most intense mining activity, which disturbs the landscape around us bringing regional environmental, economic and aesthetic problems ...
Dirner, Vojtech +3 more
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Research on the Characteristics of Gas Cushioning Hydraulic Leg Under Impact Condition
Shock and VibrationTraditional hydraulic legs ensure the safety of the leg through safety valves. However, due to the slow response speed of the safety valve, the safety valve does not respond in time when the hydraulic leg receives an impact, resulting in deformation or ...
Shiwei Li +5 more
doaj +1 more source
Financial Risks of Investments in Coal [PDF]
, 2011 Analyzes the regulatory, commodity, and construction risks of investing in coal mining and coal-fired power plants. Examines industry analysts' consensus on viable alternatives to coal, including natural gas, solar, wind, and energy ...
Amy Galland, Leslie Lowe, Tom Sanzillo
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, 2010 Energy resources have been a major focus for BGS over our 175 year history. In the past, our geologists searched for coal to keep the UK supplied with energy crucial for economic development.
Busby, Jon +8 more
core +1 more source
Coal Mining Machinery Development As An Ecological Factor Of Progressive Technologies Implementation [PDF]
, 2017 At present, a significant amount of energy spent for the work of mining machines and coal mining equipment on coal mines and open pits goes to the coal grinding in the process of its extraction in mining faces.
Efremenkov, Andrey Borisovich +3 more
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Meitan kexue jishuThe reserves and production of thick coal seams account for half of the total reserves and production of raw coal in China. By combing the history of thick coal seam mining, we summarize the technology and equipment development practice of thick coal ...
Huijun HAN +5 more
doaj +1 more source
Research on the mechanism and morphology of coal damage by water jet deflection angle
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesThis study investigates coal damage mechanisms under water jet deflection angles of 0°, 30°, 45°, and 60° through theoretical analysis, numerical simulation, laboratory experiments, and field validation.
Biao Hou +5 more
doaj +1 more source
RECLAMATION POTENTIAL OF ROBINIA PSEUDOACACIA L. ON MINING ROCK WITHIN STEPPE ZONE OF UKRAINE [PDF]
, 2018 Western Donbass is a powerful coal-mining region in the Steppe zone of Ukraine. In this region, large areas are damaged by coal mining. The mine rocks spread all over the coal district of Dnipropetrovsk region often contain toxic inorganic ...
Sytnyk, Svitlana
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Advances in Polymer TechnologyTo improve the deteriorated performance caused by CO2 release during the curing process of traditional moisture-crosslinked polyurethane or polyurea and poor flame retardancy, this work realized an effective in situ crosslinking technique triggered by ...
Zongke He +6 more
doaj +1 more source
Scientific ReportsFrequent failures of roadway anchor bolts in the roof-dripping zones of the Tashan coal mine endanger roadway stability and safety. To clarify the stress-corrosion cracking (SCC) mechanism and identify mitigation strategies, we combined water-chemistry ...
Lei Wang +4 more
doaj +1 more source