Results 91 to 100 of about 7,653 (230)
Specifics in the formation of substituence through in the Karvina part of the Ostrava-Karvina coalfield with the use radar interferometry [PDF]
, 2016 Deep extraction of minerals is accompanied by deformations of the strata overlying extracted coal seams. Deformations of overlying layers run up to the surface where a subsidence trough gradually forms.
Jiránková, Eva, Lazecký, Milan
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Flow field analysis of Jiangou mine goaf
IOP Conference Series: Earth and Environmental Science, 2018 Abstract With the increase of mining depth, many coal mines have the co-occurrence of natural fire and gas disasters. According to the actual situation of alkali ditch coal mine, this paper established a mathematical model and geometric model of mined-out area by using COMSOL software to carry on the numerical simulation.
Chengyu Li, Lili Zhang
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Numerical analysis of oxidation zone variation in goaf
Procedia Engineering, 2011 AbstractA good understanding of seepage flow distribution and the situation of coal spontaneous three zones in the goaf is of great value to integrated control of coal spontaneous combustion. Based on the theory analysis of voidage and permeability coefficient of porous media in goaf, this paper sets up a seepage flow mathematical model and analyzes ...
Tan, Bo +3 more
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Investigation on Fires in Coal Mines and Approach for Prevention – Case Study [PDF]
, 2013 Coal absorbs oxygen even at lower temperatures than the ambient temperature and they start heating up. This heating without any external source of supply of heat generally leads to due to auto-oxidation, also called spontaneous heating of coal.Due to ...
Bisoyi , Sunil Kumar +1 more
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Control Technology of Overlying Roadway in 7m Goaf
IOP Conference Series: Earth and Environmental Science, 2020 Abstract This paper takes Zhuxianzhuang Mine as the research background. In this research, the reasonable height of “three zones” of overlying strata at 7m mining height is determined by key strata theory, and the movement law of overlying strata is studied by FLAC3D numerical simulation.
Cong Liu +5 more
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Modelling of gas flows in the goaf of retreating faces [PDF]
, 1993 In retreating faces, dilution of firedamp flowing out of the goaf area at the junction of face and retum roadway is problematic. Despite important flowrates and high CH4 drainage efficiencies, it has been observed that 2/3 of firedamp evacuated by the ...
Bouet, Rémy +2 more
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Revisiting the underground gasification of coal reserves from contiguous seams [PDF]
, 2016 Purpose. Substantiating of contiguous coal seams coefficient during application of borehole underground coal gasification technology based on dependences of interstratial rocks subsidence on gasification duration. Methodology.
Dychkovskyi, R.O +4 more
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Energy Science & EngineeringRoof cutting and pressure relief mining technology has been applied in coal mine enterprises because of its advantages of improving the resource utilization rate.
Mengke Liu +4 more
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Application of numerical gas flows modelling to optimisation of nitrogen injections in the goaf [PDF]
, 1997 International audienceIn Lorraine Collieries (France), the risk of spontaneous combustion in the goaf of longwall coalfaces is relatively high. Nitrogen injections into the goaf are used to control this risk.
Bouet, Rémy +4 more
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Устройство перегрузочных пунктов комбинированных видов транспорта при разработке железорудных месторождений [PDF]
, 2016 Purpose. To develop the methodology for selecting appropriate type of open-pit transport in conditions of mining sinking to the maximum depth of opencast mining. Methods.
Dryzhenko, A, Shustov, O
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