Results 51 to 60 of about 1,416 (183)

Research on Optimal Width of Coal Pillars in Both Sides of Abandoned Mining Areas and Tunnel Control Technology

Energy Science &Engineering, EarlyView.
This study primarily investigates the optimal width for coal pillar retention in both sides of the worked‐out face section. Taking the 42201 haulage roadway of the 42201 working face at Shengxin Coal Mine as the primary research target, it analyses the optimum width for coal pillar retention through theoretical calculations, numerical simulations, and ...
Shuaifeng Yin, Kanglei Han, En Wang, Yitao Yan, Xubo Zhao   +4 more
wiley   +1 more source

Study on overburden movement law and ground pressure behavior in fully mechanized top coal caving face under the disturbance of upper coal seam

Meikuang Anquan, 2023
In recent years, most of the coal mines in Zhungeer Coalfield have entered the mining of the second main coal seams, such as 6#, 10# and 11#, with an average thickness of more than 10 m, so most of the coal mines use fully mechanized caving mining ...
Hua NAN, Zhuoying WANG
doaj   +1 more source

Making the Intangible Tangible: Organizational Capital and Stock Liquidity

British Journal of Management, EarlyView.
Abstract We propose an intangibility‐driven stock liquidity hypothesis and explore the role of organizational capital in influencing stock liquidity. Using a sample of 42,682 firm‐year observations, we uncover compelling evidence that firms' intangible organizational capital boosts stock liquidity.
Prem Puwanenthiren, Md Samsul Alam, Shehub Bin Hasan, Sivathaasan Nadarajah   +3 more
wiley   +1 more source

Boredom, despondency, and the scourge that lays waste at noon: an anthropology of acedia Ennui, abattement et le fléau qui frappe à midi : une anthropologie de l'acédie

Journal of the Royal Anthropological Institute, EarlyView.
Attentive to the ways that inertia can take hold of life, Catholic monks recognize despondency as a potential not only within the monastery, but in contemporary society more widely. Such experiences are regularly mapped onto an understanding of what early Christian monks termed ‘acedia’ (a Greek term that can be translated as ‘lack of care’). Taking as
Richard D.G. Irvine
wiley   +1 more source

Mining technology and support optimization design of super high fully mechanized caving and small mining ratio in hard and extra thick coal seam

Meikuang Anquan, 2021
In order to realize the safety, high efficiency and high recovery rate mining of 9-13 m thickness hard coal seam in Jinjitan Coal Mine, the top coal recovery rate and coal wall stability of different cutting heights are analyzed by theoretical analysis ...
MENG Xiangjun, ZHANG Jinhu, LI Mingzhong, YUE Ning, XU Yongxiang, TONG Peng, CAI Fenghua   +6 more
doaj   +1 more source

Response of Remote Tropical West Pacific Islands to Climate Variability: A Multiproxy Record From T‐Lake, Palau, Spanning the Early Holocene to Present

Archaeometry, EarlyView.
ABSTRACT Lake sediments are natural archives of past environmental dynamics and how these systems have responded to past climate variability. Sediment geochemistry, governed by local geology and climate processes, is unique to each lake‐catchment and geochemical proxies must be validated for each study site.
Jalene Nalbant, Larissa Schneider, Jessica L. Blois, Matthew Wolhowe, Julian P. Sachs, Simon G. Haberle, Geoffrey Clark   +6 more
wiley   +1 more source

Research on the characteristics of the falling behavior of mixed coal and gangue

Gong-kuang zidonghua
Traditional studies on the dynamic characteristics of coal flow during the top coal caving process, based on image detection technology, have primarily focused on specific-stage image analysis, lacking a comprehensive analysis of dynamic characteristics ...
SHAN Pengfei, YANG Tong, SUN Haoqiang, XI Bojia   +3 more
doaj   +1 more source

The Early Upper Palaeolithic open‐air site of Friedrichsdorf‐Seulberg, Germany, in the context of the northern central European Aurignacian

Boreas, EarlyView.
Our knowledge of the Early Upper Palaeolithic occupation in northern central Europe is very limited, and recent research at the open‐air site of Friedrichsdorf‐Seulberg in Hesse, Germany, provides important new information on the Aurignacian. The site is rather small (26.5 m2) and spatial analysis identified a central hearth with two associated ...
Tilman Böckenförde, Gabriele Russo, Neda Rahimzadeh, Felix Bittmann, Nikolitsa Nikolakopoulou, Thomas Terberger   +5 more
wiley   +1 more source

Application of improved and optimized fuzzy neural network in classification evaluation of top coal cavability

Scientific Reports, 2021
Longwall top coal caving technology is one of the main methods of thick coal seam mining in China, and the classification evaluation of top coal cavability in longwall top coal caving working face is of great significance for improving coal recovery ...
Meng Wang, Caiwang Tai, Qiaofeng Zhang, Zongwei Yang, Jiazheng Li, Kejun Shen   +5 more
doaj   +1 more source

Research and application of intelligent caving technology in fully mechanized working face

Gong-kuang zidonghua, 2021
The traditional top coal caving control mainly relies on manual coal caving control, which uses single-round of sequential coal caving. The working face equipped with electro-hydraulic control system mainly adopts the two-round sequential coal caving ...
WU Tong, YU Rui, LIU Qing, WEI Wenyan
doaj   +1 more source