Results 71 to 80 of about 4,125 (229)

Multiphysics Coupled Response of Stress and Seepage in Coal Under Borehole Disturbance and Optimization of Borehole Parameters

Energy Science &Engineering, EarlyView.
One‐way FLAC3D‐COMSOL coupled modeling and field validation show that a 150 mm borehole radius with 5 m spacing provides the best coordination of plastic‐zone expansion, stress relief, permeability enhancement, and gas‐pressure attenuation, increasing the pure gas drainage rate by 35.4%. ABSTRACT To rationally determine the borehole radius and borehole
Yewu Bi, Yichen Li, Yangyang Guo, Yikai Zhang, Jiazhi Sun, Kangnan Li, Yongpeng Fan, Qixian Li   +7 more
wiley   +1 more source

Safe Separation of the Low-Concentration and Oxygen-Bearing Coal Mine Methane by Vacuum Pressure Swing Adsorption

Adsorption Science & Technology, 2014
Pressure swing adsorption (PSA) is a suitable method to enrich the concentration of methane in coal mine methane (CMM) separation processes. However, traditional PSA processes for low-concentration CMM can easily increase the concentration of methane to ...
Xiong Yang, Yingshu Liu, Yongling Li, Yu Meng, Chuanzhao Zhang, Junjie Yan   +5 more
doaj   +1 more source

Experimental Study of Explosion Limits of Refrigerants and Lubricants’ Mixture

, 2012
The explosion limits of refrigerants and lubricants’ mixture were studied. The refrigerants like R161, R1234yf and R152a are combustible. Lubricants, to a certain extent, are combustion-supporting.
Chen, Guangming, Chen, Q, Shi, Y.Q
core  

Recent advances in multifunctional soft robots: A materials–structures–systems co‐design perspective for synergistic integration

FlexMat, EarlyView.
Abstract Soft robots, engineered from highly compliant materials, offer superior adaptability and safety in unstructured environments compared to their rigid counterparts. Recent advancements, fueled by bio‐inspiration and material programmability, have led to the rapid co‐evolution of their core modules: actuation, sensing, protection, energy, and ...
Qiulei Liu, Zicao Peng, Chong Sun, Haitao Yang   +3 more
wiley   +1 more source

Study and Analysis of Shock Wave Propagation in Excavation Laneway during Methane Explosion

, 2010
Coal mine can be damaged by extremely strong methane explosion, and the importance of suppressing anti-methane explosion in coal mine production safety is self-evident. The basic assumptions are used to analyze the shock wave propagation and the strength
Zhi Ming Qu
core   +1 more source

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

Geological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito, Cristiano Leite Sombra, Davy Raeder Brandão, Cleverson Guizan Silva, Sidney Luiz de Matos Mello, Eugênio Vaz dos Santos Neto, Rui Jorge Fernandes Baptista, Ramsés Capilla, Luiz Antônio Pierantoni Gambôa   +8 more
wiley   +1 more source

Methane control in United States coal mines : 1972 [PDF]

"This Bureau of Mines report presents a brief summary of the explosion trends in United States coal mines for the past 160 years.These trends show that in spite of the overall improvements in mine safety, the number of fatalities from ignitions of ...

core  

Osmosis Drives Explosions and Methane Release in Siberian Permafrost

Geophysical Research Letters
AbstractMysterious craters, with anomalously high concentrations of methane, have formed in the Yamal and Taymyr peninsulas of Siberia since 2014. While thawing permafrost owing to climate warming promotes methane releases, it is unknown how such release might be associated with explosion and crater formation.
Ana M. O. Morgado, Luis A. M. Rocha, Julyan H. E. Cartwright, Silvana S. S. Cardoso   +3 more
openaire   +4 more sources

Experiencing 50 Years of Synergistic Development in Structural Biology and Enzymology

Journal of the Chinese Chemical Society, EarlyView.
Picture of Sunney Chan with Academia Sinica (AS) President James C. Liao and three Vice Presidents: Shin‐Kun Peng (left one), Tang K. Tang (right one), and Mei‐Yin Chou (right 2), taken at the annual Chinese New Year's Banquet of AS, February 7, 2025. This was likely Sunney's last appearance in formal activities of AS.
Ming‐Daw Tsai
wiley   +1 more source

Experimental study on gas explosion to kill and injury mouse

Journal of Measurement Science and Instrumentation, 2015
The killing and injury effects of gas explosion shock wave on mouse in an open space pipeline is tested experimentally.When the methane volume fraction is 10%,the maximum explosion pressure is 0.264 MPa and the injury is the most serious.Specially,some ...
TAN Ying-xin, WANG Hai-bin, REN Rui-e
doaj