a method of extracting coal from a mine whereby a long wall of coal is mined at one time
Examples of 'longwall' in a sentence
longwall
The parameters which influence methane hazard in longwall areas were assigned specific weights (numerical values).
Eugeniusz Krause, Adam Smoliński 2013, 'Analysis and Assessment of Parameters Shaping Methane Hazard in Longwall Areas', Journal of Sustainable Mininghttp://www.sciencedirect.com/science/article/pii/S230039601530046X. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The article discusses basic functions of a powered roof support in a longwall unit.
Szurgacz Dawid 2018, 'Analysis characteristics determination of electrohydraulic control system operationto reduce the operation time of a powered roof support', E3S Web of Conferenceshttps://doi.org/10.1051/e3sconf/20182900007. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
This, in turn, can lead to disturbances in the operation of the entire longwall system.
Szurgacz Dawid 2018, 'Impact of geometry of the powered roof support section on the rock mass', E3S Web of Conferenceshttps://doi.org/10.1051/e3sconf/20187100001. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The article discusses a concept of forecasting accident risk during longwall extraction in crump-risk conditions.
Anna MANOWSKA 2015, 'THE METHOD OF ASSESSING ROCK BURSTING HAZARD IN MINING', Management Systems in Production Engineeringhttp://wydawnictwo.panova.pl/attachments/category/37/2015_02_07_Manowska.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Longwall mining continues to remain the most efficient method for underground coal recovery.
Jonathon C. Ralston, Andrew D. Strange 2013, 'Developing selective mining capability for longwall shearers using thermal infrared-basedseam tracking', International Journal of Mining Science and Technologyhttp://www.sciencedirect.com/science/article/pii/S2095268613000165. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
In this case, longwall mining safety and efficiency were seriously challenged.
Fangtian Wang, Chaohua Duan, Shihao Tu, Ningning Liang, Qingsheng Bai 2017, 'Hydraulic support crushed mechanism for the shallow seam mining face under the roadwaypillars of room mining goaf', International Journal of Mining Science and Technologyhttp://www.sciencedirect.com/science/article/pii/S2095268617305761. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Conclusions regarding the main reason of instability of longwall faces workings are made.
A.О. Khorolskiy, V.H. Grinev 2017, 'System principles and evaluation criteria of reliability for optimization of technologicalparameters of coal deposits', Vìsnik Žitomirsʹkogo Deržavnogo Tehnologìčnogo Unìversitetu: Tehnìčnì Naukihttp://vtn.ztu.edu.ua/article/view/118477/112986. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Despite its importance, there are no regulations for the mining of longwall coal seams.
María-Belén Prendes-Gero, José Alcalde-Gonzalo, Pedro Ramírez-Oyanguren, Francisco-JoséSuárez-Domínguez, Martina-Inmaculada Álvarez-Fernández 2013, 'Longwall Mining Stability in Take-Off Phase', Journal of Applied Mathematicshttp://dx.doi.org/10.1155/2013/859803. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The roof behavior in the headgate near the face was carefully observed during longwall retreat.
Peter Zhang, Dave Gearhart, Mark Van Dyke, Daniel Su, Essie Esterhuizen, Berk Tulu 2019, 'Ground response to high horizontal stresses during longwall retreat and its implicationsfor longwall headgate support', International Journal of Mining Science and Technologyhttp://www.sciencedirect.com/science/article/pii/S209526861830661X. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Parameters of the gob for longwall mining are considered.
Meshkov Sergey, Sidorenko Andrey 2017, 'Numerical Simulation of Aerogasdynamics Processes in A Longwall Panel for Estimationof Spontaneous Combustion Hazards', E3S Web of Conferenceshttps://doi.org/10.1051/e3sconf/20172101028. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)