Results 51 to 60 of about 346,667 (337)

Application of coal mine roof rating in Chinese coal mines

International Journal of Mining Science and Technology, 2018
The coal mine roof rating (CMRR) is a measure of roof quality or structure competency for bedded roof types typically of underground coal mines. The CMRR has been used widely in the US, South Africa, Canada and Australia. In order to investigate the application of the CMRR system in Chinese coal mines, two coal mines in China located in Panjiang Coal ...
Yongyin Wang, Yongyin Wang, Xianbi Xu, Abbas Taheri   +3 more
openaire   +3 more sources

A Detailed Comprehensive Role of Digital Technologies in Green Finance Initiative for Net‐Zero Energy Transition

Advanced Energy and Sustainability Research, EarlyView.
This study aims to provide actionable recommendations for leveraging digital innovation for the achievement of scalable, equitable, and transparent Net Zero Energy Transition by offering actionable recommendations. As a result of this comprehensive analysis, the review highlights the critical interplay between digital technologies and GF as vital ...
Furkan Ahmad, Ameni Boumaiza, Antonio Sanfilippo, Luluwah Al‐Fagih   +3 more
wiley   +1 more source

Experimental study on mechanical and fracture-seepage characteristics of sandstone under hydro-mechanical coupling

Meikuang Anquan
In order to explore the fluid-solid coupling feedback characteristics of rock under the action of hydro-mechanical coupling, the triaxial and pore water pressure loading tests of saturated sandstone were carried out by using the rock mechanics ...
Jiawei LI, Yujun ZHANG, Jie XIAO, Youwei LI, Zhiwei ZHANG   +4 more
doaj   +1 more source

Failure Characteristics and Deformation Control Methods of the Bottom Drum of Roadways during Repeated Mining of Multiple Coal Seams

Geofluids, 2022
As the problems of serious bottom drum and roadway broken surrounding rock are influenced by repeated mining in multiple coal seams, the factors affecting the surrounding rock deformation of a +980 m roadway in Faer coal mine by analyzing the rock ...
Changzheng Zhao, Shenggen Cao, Shuyu Du, Chiyuan Che, Xingyao Wang   +4 more
doaj   +1 more source

Demonstration Coal Mines [PDF]

Scientific American, 1920
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openaire   +2 more sources

Osmoxylon‐like fossils from early Eocene South America: West Gondwana–Malesia connections in Araliaceae

American Journal of Botany, EarlyView.
Abstract Premise Araliaceae comprise a moderately diverse, predominantly tropical angiosperm family with a limited fossil record. Gondwanan history of Araliaceae is hypothesized in the literature, but no fossils have previously been reported from the former supercontinent.
Peter Wilf
wiley   +1 more source

Case study of hydraulic fracturing for coal burst risk mitigation

International Journal of Coal Science & Technology
Coal bursts pose significant safety and operational challenges in deep mining environments, necessitating effective mitigation strategies to address high-stress concentrations and dynamic failure risks.
Hongpu Kang, Yongxue Xia, Meihua Feng, Chuang Lu, Fuqiang Gao   +4 more
doaj   +1 more source

Study on the Influences of Empty Hole and In Situ Stress on Blasting-Induced Rock Damage

Geofluids, 2021
Blasting has been used extensively in deep underground excavation. In this paper, a numerical simulation LS-DYNA was carried out to investigate the influence of in situ stress and empty hole on rock fracture development.
Ningkang Meng, Jian-biao Bai, Wenlong Shen, Yong Chen, Xiangyu Wang, Wenda Wu, Bowen Wu   +6 more
doaj   +1 more source

Natural Resource Curse and Poverty in Appalachian America [PDF]

, 2012
The Appalachian mountain region has long been characterized by deep poverty which led to the formation of the Appalachian Regional Commission (ARC) in 1965.
Betz, Mike, Lobao, Linda, Partridge, Mark   +2 more
core  

Maintenance of reusable mine workings during the augering mining of coal seams [PDF]

, 2018
The augering mining of thin and very thin coal seams has been proposed for using the efficiency of this task, related to the stability of reusable mine workings. The interrelation has been established and optimized between the
Bondarenko, Volodymyr, Chervatiuk, Viktor, Kovalevska, Iryna, Symanovych, Hennadii, Бондаренко, В. И., Бондаренко, В. І., Бондаренко, Владимир Ильич, Бондаренко, Володимир Ілліч, Ковалевская, И. А., Ковалевская, Ирина Анатольевна, Ковалевська, І. А., Ковалевська, Ірина Анатоліївна, Симанович, Г. А., Симанович, Г. А., Симанович, Геннадий Анатольевич, Симанович, Геннадій Анатолійович, Черватюк, В. Г.   +16 more
core   +1 more source