Longwall Mining
Estimating Highway Subsidence due to Longwall Mining
... Longwall mining is a common underground coal extraction technique in ...m. Longwall panels were mined underneath highway I-79 in the Cumberland and Emerald mines in southwestern Pennsylvania, ...
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A roof cavability classification system and its use for estimation of main caving interval in longwall mining
... of longwall mining in which the caving process is a fundamental ...the longwall operation while delayed or poor caving will lead to severe consequences, resulting in reduction of safety and ...of ...
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The Influence of a Local Fault Zone on High Energy Tremor Occurrence During Longwall Mining of a Coal Seam
... Underground mining of coal seams in the Upper Silesian Coal Ba- sin in Poland is accompanied by seismic activity of varying ...with mining or coupled with geological structures, such as large ...during ...
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Study on Characteristic of Overburden Movement in Unsymmetrical Isolated Longwall Mining Using Microseismic Technique
... on longwall mining Considering the superposition of high static underground stress around the isolated face and dynamic load of mining-induced tremors, the rock burst risk in the mining ...
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Geophysical Evaluation of Effectiveness of Blasting for Roof Caving During Longwall Mining of Coal Seam
... Abstract—Deep longwall mining of coal seams is made in the Upper Silesian Coal Basin (USCB) under complicated and mostly unfavourable geological and mining ...the longwall face does not occur, ...
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Numerical modelling of the longwall mining and the stress state in Svea Nord Coal Mine
... In order to investigate the roof strata cave-in mechanism in detail a discontinuous numerical simulation of roof cave-in process was conducted by UDEC code. The block size in the roof strata and the mechanical parameters ...
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Evolution of Longwall Mining and Control Systems in the United States
... of longwall installations steadily increased every year between 1963 and 1973, with a slight lull during 1970 and ...of longwall mining and the increase in mechanization has had an impact on the ...
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Critical Break Length of Floor Aquiclude During Longwall Mining Above Confined Aquifer
... and mining conditions of Jiulishan coalmine, Jiaozuo group, critical break length of aquiclude in three failure modes including bending failure, shear failure and duckling failure of pressure bar are ...the ...
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A critical evaluation of dust sampling methodologies in Longwall Mining in Australia and the USA
... The long standing practice in underground coal mines has been to collect samples from crib room to crib room and for a minimum period of five hours. This is to avoid a number of practical difficulties in collecting ...
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Scale modeling of dust capture through a flooded-bed dust scrubber integrated within a longwall shearer
... a longwall mine face is among the more difficult challenges for a longwall mine ...in longwall mining, through the application of a flooded-bed dust scrubber to a longwall ...a ...
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Study of Strata and Support Behaviour of a Longwall Mine
... 2.1 Longwall Mining Method With a typical width of around 150-400 meters, a longwall panel is about 1000 to 3000 meters long with the thickness of seam near about 2-4 ...A longwall can be ...
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3D strain softening modelling of coal pillars in a deep longwall mine
... Keywords: Longwall, Pillar, Strain softening, Modelling 1.Introduction The longwall mining is a method with high production capacity and highly mechanized ...state mining [1]. However, in the ...
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Stress Measurement in Coal Seam Ahead of Longwall Face – Case Study
... Figure 1: Location of the Karvina Sub-basin in the Upper Silesian Coal Basin (USCB) In addition, seams No. 1, 2, and 3 have been irregularly mined out in the overburden. This causes irregular stress distribution in the ...
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Longwall shearer cutting force estimation
... Estimation Longwall mining is an underground coal mining method that is widely ...the longwall can benefit from knowledge of the cutting forces at the coal/shearer interface, particu- larly in ...
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Conventional approaches for assessment of caving behaviour and support requirement with regard to strata control experiences in longwall workings
... in longwall is a complex issue and requires utmost care in such ...for longwall mining operation in a given geo-mining ...than longwall technology for working coal seams at greater ...
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Geohazards assessment in longwall coal mining using monitored seismic events
... Rockburst is a common type of geohazards resulted in dynamic instability of the underground structures in longwall mining, which directly affects the safety of miners, equipment and mining ...
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Incorporating the interrelationship between primary and support processes in monitoring and optimising longwall coal mining efficiency
... A longwall move involves moving machinery from the completed longwall, to the next longwall ...done, longwall production can re-commence. The longwall shearer produces coal from the ...
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The effects of loose top-coal on the mining pressure of support in longwall top-coal caving mining
... the mining pressure and to keep the stability of the working face in the real process of coal ...the mining pressure but also increases the efficiency of recovery, should also be ...
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RELIABLE AND EFFICIENT MINING MINING CABLES
... of mining cables, TF Kable has over a dozen various production lines of continuous vulcanization, twisters, braiders, ...also mining cables in polyurethane sheath, which is one of the best tear resistant ...
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Mining Safety of Longwall Top-coal Caving in China
... Using standard longwall equipment, annual production can reach 3 million metric tons (Mt), and a maximum of 4.1 Mt has been obtained; many top-coal caving longwall working f[r] ...
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