Rib/snook design in mechanised depillaring of rectangular/square pillars [PDF]
, 2016 This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.A field study at different mechanised depillaring (MD) operations in Indian coalfields (with depth ranging from 60 to 377 m and caveability ...
Coggan, John
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Evaluation of coal longwall caving characteristics using an innovative UDEC Trigon approach [PDF]
, 2016 Author version of article. The version of record is available from the publisher via DOI: 1016/j.compgeo.2013.09.020Copyright © 2013 Elsevier Ltd. All rights reserved.The paper presents an innovative numerical approach to simulate progressive caving of ...
Coggan, John, Gao, Fuqiang, Stead, Doug
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Meitan xuebaoIn order to solve the problems of surface runoff disorder, poor water connectivity, and weak hydrodynamic water circulation capacity in high groundwater level mining areas in the east, and to reduce the non-point source pollution and point source ...
Shaogang LEI +5 more
doaj +1 more source
Energies, 2023 The fracture field and permeability distribution model of comprehensive working face goaf was integrated upon the theoretical examination to investigate the fracture field distribution law of goaf and gas migration and accumulation characteristics, and ...
Qian Ma +3 more
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Numerical Simulation on goaf with different vertical distances in high-drainage roadways [PDF]
E3S Web of Conferences, 2020 High drainage roadway horizon parameters not only influence goaf drainage effect, but also have effect on the air leakage field and spontaneous combustion three zones’ distribution in the goaf.
Yang Rili +4 more
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Alliance free and alliance cover sets
, 2008 A \emph{defensive} (\emph{offensive}) $k$-\emph{alliance} in $\Gamma=(V,E)$ is a set $S\subseteq V$ such that every $v$ in $S$ (in the boundary of $S$) has at least $k$ more neighbors in $S$ than it has in $V\setminus S$.
H. Fernau +13 more
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Experimental studies of the seam openings competence in different methods of protection under pitch and steep coal seams development [PDF]
, 2018 Purpose. Investigation of the seam openings competence in different methods of protection in complex mining and geological conditions of pitch and steep coal seams development of Donbas. Methods.
Chepiga, D +3 more
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Study on the Effect of Pore Evolution on the Coal Spontaneous Combustion Characteristics in Goaf
FireUnderstanding the characteristics of coal spontaneous combustion (CSC) in goaf under different porosities is crucial for comprehending the mechanism of CSC and its prevention and control.
Jinglei Li, Hao Xu, Genshui Wu
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Mechanism of rigid overlaying of carboniferous strata failure in face mining in the case of a multiseams deposit [PDF]
, 2013 The technique of assessing the failure of rigid overlying strata is applicable to deep mining with thick coal seams (a thickness of more than 1 m in the Ostrava–Karvina Coalfield), and in one case to longwall mining with controlled caving.
Doležalová, Hana +3 more
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Integrated Treatment Technology of Storage‐Mining Inclined Goaf under Expressway [PDF]
Advances in Civil Engineering, 2020 An inclined goaf caused by storage mining is a serious risk to subgrades and pavements. In this paper, effective investigation and detection methods of goafs were discussed considering the project of the Urumqi East Ring Expressway crossing the existing goaf of Zhongxing no. 2 mine.
Weixing Bao +5 more
openaire +2 more sources