Results 61 to 70 of about 51,330 (256)

Measurement of effective radius of gas drainage of bedding drill hole in low permeability coal seam

Gong-kuang zidonghua, 2014
In view of low permeability characteristics of No.3 coal seam in Changping Coal Mine, the effective radius of gas drainage of bedding drill hole was measured and analyzed by improving sealing process with polyurethane-expansive cement and use of hole ...
WANG Xing, WANG Fei, LIU Xiang, HAO Yabing   +3 more
doaj   +1 more source

Influence of combination forms of intact sub-layer and tectonically deformed sub-layer of coal on the gas drainage performance of boreholes: a numerical study

International Journal of Coal Science & Technology, 2020
High concentration and large flow flux of gas drainage from underground coal seams is the precondition of reducing emission and large-scale use of gas.
Wei Zhao, Kai Wang, Rong Zhang, Huzi Dong, Zhen Lou, Fenghua An   +5 more
doaj   +1 more source

Reasonable Pumping Depth for Drainage and Gas Recovery of Shale Gas Wells

International Journal of Heat and Technology, 2020
For shale gas wells, in the initial production stage, the liquid production is large, and the lifting process is needed to assist the drainage. However, for gas wells, especially shale gas wells, the ultimate purpose is different from that of oil wells, and the current design method of pumping depth cannot meet the field requirements. Starting from the
Jianda Chen, Dajiang Wang, Zhiquan Zhang, Jie Liu   +3 more
openaire   +2 more sources

2D Abrupt Nano‐Junctions Blending sp–sp2 Bonds on Atomically Precise Heterostructures

Advanced Materials, EarlyView.
A lateral heterostructure between atomically precise sp–sp2$^2$ metalated graphdiyne and sp2$^2$ graphene nanoribbons is realized by on‐surface synthesis and investigated by STM and DFT. The impact of on‐surface synthesis byproducts on covalent junction formation yield is unveiled.
Alice Cartoceti, Simona Achilli, Masoumeh Alihosseini, Adriana E. Candia, Enrico Beltrami, Paolo D'Agosta, Alessio Orbelli Biroli, Francesco Sedona, Andrea Li Bassi, Jorge Lobo‐Checa, Carlo S. Casari   +10 more
wiley   +1 more source

Heat–fluid–solid coupling model for gas-bearing coal seam and numerical modeling on gas drainage promotion by heat injection

International Journal of Coal Science & Technology, 2019
Improving the absorbed gas to active desorption and seepage and delaying gas drainage attenuation are considered as key methods for increasing drainage efficiency and gas output. According to the solid mechanics theory, the nonlinear Darcy seepage theory
Ruifu Yuan, Chunling Chen, Xiao Wei, Xiaojun Li   +3 more
doaj   +1 more source

Design of surface drainage system in Zhangbei coal mine and forecast of gas drainage

IOP Conference Series: Earth and Environmental Science, 2020
Abstract In order to optimize the design of the surface well extraction system at the 11418-working face of Zhangbei Mine, the gas drainage volume at the 11418 working face of Zhangbei Mine is predicted. Based on COSFLOW numerical analysis, this paper predicts the amount of gas drainage and gas emission from the borehole of the 11218 ...
openaire   +1 more source

Toward Pore‐Engineered 3D‐Printed Materials for Sorption Water Harvesting, Interfacial Evaporation, and Radiative Cooling

Advanced Materials, EarlyView.
Water harvesting, radiative cooling, and interfacial solar evaporation are fundamentally governed by coupled heat, mass, and light transport processes. These processes are mediated by pore architecture, including pore size, connectivity, and hierarchical organization.
Dejan J. Trajkovski, Higgins M. Wilson, Abdallah Y. M. Ali, Jiaxing Xu, Ruzhu Wang, Primož Poredoš   +5 more
wiley   +1 more source

Research on coupling law of gas and coal spontaneous combustion in goaf of high gas mine

Gong-kuang zidonghua, 2020
In view of problem that current numerical simulation of combined hazards of gas and coal spontaneous combustion in goaf only considers fluid effects, and does not consider influence of other physical fields, multi-field coupling numerical simulation ...
XING Zhen
doaj   +1 more source

Descriptors to Dynamics: A Materials and Device Perspective on in‐Materio Physical Reservoir Computing for Neuromorphic Edge Intelligence

Advanced Materials, EarlyView.
Intrinsic material dynamics are harnessed as computational resources for neuromorphic in‐materio physical reservoir computing. Defects, ionic motion, interfaces, percolation, geometry, and biasing shape transient states that provide fading memory, nonlinearity, and high‐dimensional projection for simple readout. A descriptor‐to‐dynamics framework links
Kshitij RB Singh, Alif Syafiq Kamarol Zaman, Muzhen Xu, Yuki Usami, Saptarshi Das, Hirofumi Tanaka   +5 more
wiley   +1 more source

Study and application on influence mechanism of instability and collapse of drainage borehole on gas drainage

Meitan xuebao, 2023
The instability and collapse of drainage boreholes is one of the key problems that hinder the efficient extraction of coal-bed methane (CBM). In order to solve the problem of instability and collapse of extraction boreholes in soft coal seams, based on the laboratory tests and theoretical analysis of variable mass flow pressure drop, a coupled ...
Xuebo ZHANG, Hao WANG, Ming YANG, Pan WANG, Linxiu HAN   +4 more
openaire   +1 more source