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Influence of longwall mining on the stability of gas wells in chain pillars [PDF]
International Journal of Mining Science and Technology, 2020 Longwall mining has a significant influence on gas wells located within longwall chain pillars. Subsurface subsidence and abutment pressure induced by longwall mining can cause excessive stresses and deformations in gas well casings.
Peter Zhang +4 more
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Study of water-conducting fractured zone development law and assessment method in longwall mining of shallow coal seam [PDF]
Scientific Reports, 2022 Starting from the source of mining, scientific understanding of surface damage law and assessment method in longwall mining of shallow coal seam is conducive to solving the problems of geological hazards and deterioration of the ecological environment ...
Xiaobin Li +5 more
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Selection of longwall shearers based on the results of research on the mechanical properties of coal [PDF]
Scientific ReportsThe proper selection of cutting longwall winning machines for specific mining and geological conditions requires the development of an appropriate algorithm.
Witold Biały +2 more
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Rock pressure relief is the basic alternative for sustainable underground mining [PDF]
E3S Web of Conferences, 2021 Retreat longwall mining is the most productive system for underground extraction of tabulated deposits. However, the steady growth of the mining depth dramatically increased the ground pressure in chain pillars protecting the longwall entries. Therefore,
Nazimko Victor +3 more
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FACTORS TO BE CONSIDERED FOR THE DESIGN OF FACE SUPPORTS IN LONGWALL MINING METHOD [PDF]
JES: Journal of Engineering Sciences, 2022 The main purpose of mine workings is the exploitation of ores and minerals that are used in different aspects of life. The most common underground method all over the world is the longwall mining method.
Peter Haroon +3 more
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Strata Caving and Gob Evolution Characteristic in Longwall Mining
Shock and Vibration, 2022 It is usually difficult to capture strata caving and gob evolution characteristic in longwall mining at engineering scales. This paper uses bonded block modelling (BBM) approach within a distinct element method (DEM) code to simulate strata behaviour in ...
Weidong Pan, Xinyuan Li, Zhining Zhao
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Experimental study of transient thermal conditions in longwall faces
Горные науки и технологии, 2022 With limited mineral resources, existing mines are seeking to extract increasingly hard-to-reach and deep-seated mineral reserves. Increasing mining depth leads to problems connected with the provision of comfortable and safe working conditions. The main
Maxim O. Perestoronin +3 more
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International Journal of Mining Science and Technology, 2021 Many states rely upon the Pennsylvania 1957 Gas Well Pillar Study to evaluate the coal barrier surrounding gas wells. The study included 77 gas well failure cases that occurred in the Pittsburgh and Freeport coal seams over a 25-year span.
Peter Zhang, Daniel Su, Chris Mark
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Pillar design and coal burst experience in Utah Book Cliffs longwall operations
International Journal of Mining Science and Technology, 2021 Longwall mining has existed in Utah for more than half a century. Much of this mining occurred at depths of cover that significantly exceed those encountered by most other US longwall operations.
Christopher Mark, Michael Gauna
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Gong-kuang zidonghua, 2020 Taking transparent coal seam, transparent fully-mechanized mining equipment and transparent decision-making and control as core, concept of intelligent mining based on transparent longwall face was put forward, namely based on enhanced geological ...
WANG Feng
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