Results 11 to 20 of about 1,342 (177)
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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Energies, 2022 The main goal of the paper is numerical simulation for investigation of damage causes in the working of a longwall located under the unmined longwall panel. The paper presents the results of model-based research on the stability of the roof of a longwall
Sylwester Rajwa +4 more
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DETERMINATION OF WORKLOADS IN CUTTING HEAD OF LONGWALL TUMBLE HEADING MACHINE [PDF]
Management Systems in Production Engineering, 2016 The mining organ of the longwall heading machine KGS-320 with radial tools was the subject of the analysis. Cooperation of single knife with the mined solid rock was estimated in order to determine values of the forces and moments that might occur in the
Witold BIAŁY
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Longwall automation: trends, challenges and opportunities
International Journal of Mining Science and Technology, 2017 This paper explores the ongoing development and implementation of longwall automation technology to achieve greater levels of underground coal mining performance.
Jonathon C. Ralston +2 more
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Comparative analysis of the mine pressure at non-pillar longwall mining by roof cutting and traditional longwall mining [PDF]
Journal of Geophysics and Engineering, 2019 Abstract Non-pillar coal mining has been developed and implemented in the recent decades in China's coal mining industry. The non-pillar longwall mining by roof cutting without pre-excavated entry (N00 mining method) is one of the latest non-pillar mining methods and this method has the advantages of reduced roadway drivage ratio and ...
Peng Zhou +3 more
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An investigation of longwall failure using 3D numerical modelling – A case study at a copper mine
Studia Geotechnica et Mechanica, 2021 It is well-known that the longwall mining method (with roof caving) is widely used in underground mining extraction for bedded deposits (e.g. coal) due to its numerous advantages.
Nguyen Phu Minh Vuong +2 more
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