Results 241 to 250 of about 2,675 (286)

Mechanism and control of asymmetric floor heave in thick-seam gob-side roadways with staggered-elevation negative coal pillar layout. [PDF]

Sci Rep
Liu B, Wang P, Wang Z, Lin L, Zhou X, Batugin AS.   +5 more
europepmc   +1 more source

Simulation of deformation characteristics of irregular rock specimens with different mining face lengths. [PDF]

Sci Rep
Zhang Y, Liu X, Wei S, Lin H, Xie J, Ni X.   +5 more
europepmc   +1 more source

Numerical Investigation of Gas Migration and Spatiotemporal Evolution in Y‑Type Ventilation Working Faces with Gob-Side Entry Retaining Using COMSOL. [PDF]

ACS Omega
Zhai Y, Yang Y, Wu L, Yang W, Liu S, Li L, Lei J.   +6 more
europepmc   +1 more source

Research and Application of Mining-Induced Fracture Evolution and the Mechanism of Pressure Relief Gas Migration and Storage in Overlying Strata during Soft Rock Protective Layer Mining. [PDF]

ACS Omega
Cheng X, Yang Y, Zhao G, Chen Y.
europepmc   +1 more source

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Caving mechanisms of loose top-coal in longwall top-coal caving mining method

International Journal of Rock Mechanics and Minings Sciences, 2014
Abstract The top-coal caving mining method, developed steadily in the past two decades, has become the main method for thick seam coal mining in China. In recent years, the core research areas in the top-coal caving mining are the mechanisms of top-coal caving and the improvement of top-coal recovery ratio.
Jiachen Wang, Shengli Yang, Yang Li, Like Wei, Haohao Liu   +4 more
exaly   +2 more sources

Investigation of the effect of caving height on the efficiency of the longwall top coal caving production method applied in inclined and thick coal seams by physical modeling [PDF]

International Journal of Rock Mechanics and Minings Sciences, 2023
© 2022 Elsevier LtdThe longwall top coal caving (LTCC) production method, applied by forming a face in the horizontal thickness of the seam and also called horizontal section top coal caving, especially in studies originating from China, is widely used ...
Arif Çelik, Y Özçelik
exaly   +2 more sources

Application of a mesh-free continuum method for simulation of rock caving processes [PDF]

International Journal of Rock Mechanics and Minings Sciences, 2011
Understanding the caving process and material flow is fundamental to block and sublevel cave mining, and also to longwall mining in sedimentary deposits.
Raj Das, Paul Cleary, Shivakumar Karekal   +2 more
exaly   +4 more sources

Numerical Damping Calibration Study of Particle Element Method-Based Dynamic Relaxation Approach for Modeling Longwall Top-Coal Caving [PDF]

Energies, 2021
When using the explicit dynamic relaxation approach (DRA) to model the quasi-static rock breakage, fragmentation, and flow problems, especially the top-coal caving question, introducing numerical damping into the solution equation is inevitable for ...
Shen Wang, Xiaokai Xu, Zhang Weiyu
exaly   +2 more sources

Stress analysis of longwall top coal caving [PDF]

International Journal of Rock Mechanics and Minings Sciences, 2010
Longwall top coal caving (LTCC) is a relatively new method of mining thick coal seams that is currently achieving high productivity and efficiency in application, particularly in China.
Habib Alehossein
exaly   +2 more sources

Comparison of 222Rn measurement methods in caves

2021
<p>Radon (222Rn) is a naturally inert radioactive gas, originating from the radioactive decay of 226Ra in the 238U radioactive decay chain. 222Rn has a variety of geoscientific applications. 222Rn, however, represents the most significant source of ionizing radiation exposure and can be critical in underground working and living spaces ...
Sara Gil-Oncina, Concepción Pla, Javier Valdes-Abellan, Noé Garcia-Martinez, David Benavente   +4 more
openaire   +1 more source