Results 81 to 90 of about 69,019 (276)

Modeling and experimental validation of bolt–grout bond–slip behavior for deep underground excavation support

Deep Underground Science and Engineering, EarlyView.
A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian, Xiaohui He, Kexue Wang, Yufei Wu, Guoxin Wang, Shaochen Zhang, Jun Yang   +6 more
wiley   +1 more source

Static and dynamic mechanical properties and macro-micro coalburst prevention mechanisms of water-immersed coal

Meitan kexue jishu
Hydration weakens the macro-mesoscopic mechanical properties of burst-prone coal, enhances the stress wave energy reflection-refraction capability of the coal, and reduces the risk of impact energy release in water-injected roadways.
Aiwen WANG, Dewei FAN, Yishan PAN, Lianpeng DAI, Chaoran LI, Kailei YANG, Wei ZHANG, Xingfa LIU, Hanqi LIU, Chuang LU   +9 more
doaj   +1 more source

Applications of acoustics in the measurement of coal slab thickness [PDF]

The determination of the possibility of employing acoustic waves at ultrasonic frequencies for measurements of thicknesses of slabs of coal backed by shale is investigated.
Hadden, W. J., Jr., Mills, J. M., Pierce, A. D.   +2 more
core   +1 more source

Volume 2, Number 6 - March 1922 [PDF]

, 1922
Volume 2, Number 6 - March 1922. 39 pages including covers and advertisements. Contents J.P.W., To Our Friend Walsh, John P., Poetry of Ireland Dillon, John E., The Victim Dwyer, Francis L., Youth Beattie, James V., St.

core   +1 more source

Magnetic fileds of coalescing neutron stars and the luminosity function of short gamma-ray burst

, 2009
Coalescing neutron star binaries are believed to be the most reliable sources for ground-based detectors of gravitational waves and likely progenitors of short gamma-ray bursts.
A. E. Egorov, A. G. Kuranov, A. G. Kuranov, A. V. Tutukov, B. Abbott, C. A. Faucher-Giguere, D. Bhattacharya, D. Eichler, D. Lai, D. Lorimer, E. Flowers, E. Nakar, E. P. J. Heuvel van den, E. P. J. Heuvel van den, E. V. Gotthelf, G. A. E. Wright, G. B. Hobbs, G. S. Bisnovatyi-Kogan, G. S. Bisnovatyi-Kogan, G. V. Lipunov, G.V. Lipunova, H. C. Spruit, J. Braithwaite, K. A. Postnov, K. A. Postnov, K. A. Postnov, K. Belczynski, K. H. Prendergast, L. P. Grishchuk, L. Y. Tung, P. L. Gonthier, P. M. Woods, P. Podsiadlowski, R. J. Tayler, R. Romani, R. Taam, S. B. Popov, S. F. Portegies Zwart, S. I. Blinnikov, S. Komissarov, S. R. Kulkarni, V. B. Braginskiĭ, V. M. Lipunov, V. M. Lipunov, V. S. Beskin, V. V. Usov, V.M. Lipunov, Yu. Lyubarsky   +47 more
core   +1 more source

Gasworks [PDF]

, 2008
The material imagination of the nineteenth century had to deal increasingly with what had previously been thought to be immaterial, or as good as, and with largely imaginary forms of material.
Connor, Steven
core   +2 more sources

Mechanism and disaster control new technology of strong ground pressure manifestation in ultra‐large mining face

Deep Underground Science and Engineering, EarlyView.
In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu, Manchao He, Jun Yang, Yubing Gao, Qiang Fu, Qing Ma, Yajun Wang   +6 more
wiley   +1 more source

Characteristics of the 3 most common types of occupational accident in Spanish sub-surface and surface mining, from 2003–2008 [PDF]

, 2012
The rate for work related accidents in Spanish mining has decreased during recent years. However, the incidence rate per 100,000 workers in the Spanish mining sector in 2007 was significantly higher than the ones reported in the mining industry of other ...
Freijo Álvarez, Modesto, Sanmiquel Pera, Lluís, Vintró Sánchez, Carla   +2 more
core   +2 more sources

Structural and stress analysis in mining practice in the Upper Silesian Coal Basin [PDF]

, 2013
The irregular distribution of stress in rock mass is a decisive factor for the origin of rock bursts. Besides, a sound knowledge of stress distribution is very important in the excavation of mine workings. Stress state is affected both by natural stress,
Grygar, Radomír, Ptáček, Jiří, Waclawik, Petr   +2 more
core   +1 more source

Dynamic geo‐hydrogeological monitoring‐driven situational awareness for real‐time floor water inrush risk prediction in deep mining

Deep Underground Science and Engineering, EarlyView.
The fused data extracted from the distributed monitoring system as the data basis, combined with dynamic geological data, are imported into a deep learning model. As the geological conditions of mining and excavation change, the risk of water inrush at the working face is retrieved in real time.
Yongjie Li, Huiyong Yin, Fangying Dong, Tao Wu, Chao Zhang   +4 more
wiley   +1 more source