Results 61 to 70 of about 40,102 (196)

Mechanism and Numerical Simulation of Vertical Fracture Propagation in Composite Coal Rock

Shock and Vibration, 2022
Vertical fracture propagation mechanism is important to understand the effect of hydraulic fracturing on the roof of outburst coal seams. In this paper, the differences in physical parameters and in situ stress between an outburst coal seam and its roof ...
Fan Zhang, Hanjin Wan, Yan Liu, Shuwei Li, Zijiang Li   +4 more
doaj   +1 more source

Dynamic behavior of outburst two-phase flow in a coal mine T-shaped roadway: The formation of impact airflow and its disaster-causing effect

International Journal of Mining Science and Technology, 2023
The study of the dynamic disaster mechanism of coal and gas outburst two-phase flow is crucial for improving disaster reduction and rescue ability of coal mine outburst accidents.
Liang Cheng, Jiang Xu, Shoujian Peng, Hailin Yang, Feng Jiao, Bin Zhou, Fazhi Yan   +6 more
doaj   +1 more source

Discovery of a Magnetic White Dwarf in the Symbiotic Binary Z Andromedae [PDF]

, 1998
We report the first result from our survey of rapid variability in symbiotic binaries: the discovery of a persistent oscillation at P=1682.6 +- 0.6 s in the optical emission from the prototype symbiotic, Z Andromedae.
Duschl W. J., Duschl W. J., Formiggini L., J. L. Sokoloski, Lars Bildsten, Meyer-Hofmeister E., Mikolajewska J., Mikolajewski M., Mikolajewski M., Murset U., Robinson K., Schmid H. M., Tomov T.   +12 more
core   +2 more sources

Conjecture about mechanism of butterfly-shape coal and gas outburst in excavation roadway

矿业科学学报, 2017
Referring to roadway butterfly shape rock burst mechanism and nonlinear dynamic system theory, a conjecture about butterfly-shape coal and gas outburst mechanism in excavation roadway has been made, In this conjecture, the mechanical essence of coal and ...
Ma Nianjie, Zhao Xidong, Zhao Zhiqiang, Guo Xiaofei, Liu Hongtao, Jia Housheng   +5 more
doaj  

Mechanisms for Dwarf Nova Outbursts and Soft X-ray Transients [PDF]

, 1996
I review models trying to explain dwarf-nova outbursts and soft X-ray transients. The disc-instability model for dwarf-novae is still in its preliminary state of development: its predictions depend very strongly on the unknown viscosity mechanism. It is also doubtful that a {\sl pure} disc-instability phenomenon will be able to describe {\sl all} types
openaire   +2 more sources

Transient outburst mechanisms in Supergiant Fast X-ray Transients [PDF]

Advances in Space Research, 2009
Invited talk at the 37th COSPAR Scientific Assembly, held on 13-20 July 2008, in Montreal, Canada. Symposium E, session 11. Accepted for publication in Advances in Space Research.
openaire   +2 more sources

Experimental Study on Adsorption Pore Structure and Gas Migration of Coal Reservoir Using Low-Field Nuclear Magnetic Resonance

Advances in Civil Engineering, 2020
For the quantitative recognition and characterization of the flow characteristics of polymorphism coalbed gas in tectonic coal, experiments on pore morphology, pore diameter distribution, and methane adsorption law in outburst tectonic coal were carried ...
Jiazhuo Li, Penghui Guo, Wenhao Xie, Jiaqi Chu, Zhiqiang Yin, Anying Yuan, Ming Zhang, Zhenhua Jiao   +7 more
doaj   +1 more source

Near-Infrared H and K band studies of the 2006 outburst of the recurrent nova RS Ophiuchi

, 2009
We present near-IR photo-spectroscopy in the H and K bands of the 2006 outburst of the recurrent nova RS Ophiuchi (RS Oph). The observations cover the period between 1 to 94 days after the eruption. The near IR light curve and an extensive set of spectra
Ashok, Banerjee, Bautista, Bode, Bode, Brandi, Buil, Chesneau, D. P. K. Banerjee, Das, Das, Evans, Evans, Evans, Fekel, Fujii, Gorbatski, Hamann, Hamann, Harman, Hirosawa, Iijima, Johansson, Johansson, Jordan, Kantharia, Landini, Lynch, Lynch, Marshall, Monnier, N. M. Ashok, Nelson, Ness, Ness, O'Brien, O'Brien, R. K. Das, Rodriguez-Ardila, Rosino, Rudy, Rudy, Rudy, Rudy, Rudy, Rupen, Shull, Skopal, Snijders, Sokoloski, Storey, Vaytet, Wagner, Whitelock, Worters   +54 more
core   +1 more source

Unveiling U Gem Outbursts: Light Curve Analysis and Exploring Correlations of Outburst Mechanism

As a nova-typed cataclysmic star, U Gem exhibits outbursts in brightness and stars like this have left astronomers puzzled about the underlying mechanism. By analyzing U Gem’s light curve (a graph representing its changing magnitude over time which reveals the outburst cycle), spectrums, and the temperature variation of its white dwarf component, we ...
Talha Zobair, S.M. Fuad Hasan
openaire   +1 more source

Experimental study on the influence of initial desorbed gas from crushed coal on the dynamic effects of coal and gas outburst

Meitan xuebao
A large amount of gas rapidly released during coal and gas outburst is an important cause of dynamic effects such as outburst shock waves and coal-gas two-phase flow.
Jie CAO, Qianting HU, Xusheng ZHAO, Haitao SUN, Linchao DAI   +4 more
doaj   +1 more source