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Abstractoal mining under conditions of sufficiently high pore gas pressure can produce the hazard of dynamic failure of coal known as coal and gas outbursts during an outburst, coal fragmentation occurs and the fragmented coal is projected into the mine opening, accompanied by a rapid release of gas.
2019-3-5fault diagnosis technology of electromechanical maintenance in fully mechanized coal mining this paper mainly analyzes the current situation of the development of the fault diagnosis of electromechanical maintenance of fully mechanized, focuses on the.
To cite this abstract in ama style trupin l, yelin eh, schmajuk g, blanc pccupational exposure to coal and silica dust is associated with elevated risk of rheumatoid arthritis in coal mining areas of us abstract.
1997-1-1abstract coal mining and collapse are a pair of contradictions which are usually objective realities in resources overlapping areasanzhou tengzhou lianghuai huainan huaibei region is the most important energy base of the region of east china.
2009-1-18abstract the development of coal-mining cities in northeast china is the hot topic which the country pays attention tohe article carries out the vulnerability appraisal of coal-mining cities in northeast china from three levels of natural system.
Abstract mineable coal reserves in thick and extra-thick seams account for 44 of the total deposit in china fully-mechanized top-coal caving technology is a new mining method of safe and efficient underground operations in extra-thick seams in china.
Abstract of coal miningssessing and managing spontaneous combustion ssessing and managing spontaneous combustion of coal 4 abstract this report summarises the most common, practical methods used to determine the propensity of coal to self-heat and considers the external factors which can combine to result in a spontaneous combustion event.
The learning objectives in this case are gaining insight into the dilemmas of sustainability in coal mining by exploring various interest groups in difficult sustainability situations and enhancing understanding of getting a buy-in from various stakeholders when leading change in the coal-mining sector.
2011-11-2abstract in view of the importance of the permeability of top coal to the safety of the working face of fully mechanized caving mining, the variation of the permeability of top coal is studied and analyzed in the limit equilibrium zone.
Abstract coal mining can seriously affect groundwater systems in aquifers that overlie the coal seam, especially in dry and water-stressed areas where protection of groundwater resources is very important.
2019-11-6abstractoal mining has environmental impacts on surrounding areas, including heavy metal contamination of soilhis study explores the feasibility of using hyperspectral remote sensing to determine the heavy metal cr, ni, cu, zn, cd, pb content of soils in a coal-mining area in the city of zoucheng, shandong province, china.
Cite this article zhao ye,zhang lu,shen xiaomprehensive evaluation of safety culture of local coal mining enterprisesjafety in coal mines, 2018, 498 273-275rl.
Impacts of coal mining on aquatic ecosystems in - acarp abstracthis report, together with a companion volume published in 2002, examines the scale and types of impacts on aquatic ecosystems associated with coal mining.
2016-10-20spillover effect of the artificial wetland in the coal mining subsidence lake on surrounding land price a case study on jiuli lake wetland in xuzhou city laijian wang 1, 2 , shaoliang zhang 3, pengcheng yin 4, lachun wang 1 , shangui peng 5.
2016-5-26abstract shanxi, shaanxi, inner mongolia, ningxia, and gansu hereafter generally referred as the western area are major coal-producing areas in china due to rich coal resources and good mining conditions.
Coal beneficiation process diagramany breakers and washeries efficiently handle the coarser sizes, but waste the coal fineshis problem is assuming major importance due to the increase in the amount of coal fines being produced by the mechanization of coal mining.
Coal has been an important commodity in south africa for many years and it is one of the oldest mining enterprises in the countryts role since 1923 as a primary source of energy has steered the.
Abstractoal mining is one of the core industries that contribute to the economic development of a country but deteriorate theenvironmenteing the primary source of energy coal has becomeessential to meet the energy demand of a country.
Central south university press and springer-verlag berlin heidelberg 2017 abstract the stability of room mining coal pillars during their secondary mining for recovering coal was analyzedn analysis was performed for the damage and instability mechanism of.
Abstract the influence of coal exploitation and construction of shenfu-dongsheng coal mining area on sediment transportation of the yellow river has been paid more attentions.
2013-12-9abstract the extraction of aluminum from coal mining waste cmw is an important industrial process the two major problems in applications are low aluminum dissolution efficiency and high iron content in the raw material, which affect the quantity and quality.
Abstract 24 html 0 kb pdf 0 kb 360 2 strata control and scientific coal mining a celebration of the academic thoughts and achievements of academician minggao qian.