Results 221 to 230 of about 108,952 (299)

Dynamic cracking properties and generating conditions of coal under rapid gas release

Deep Underground Science and Engineering, EarlyView.
Gas release tests revealed that crack initiation and propagation are jointly controlled by initial crack length, residual strength, and gas release velocity. A new outburst risk coefficient was thus developed from a fracture mechanics perspective, offering a novel predictive approach.
Bing Zhang, Hanpeng Wang, Liang Yuan, Guofeng Yu, Wei Wang, Benliang Chen, Bo Ren   +6 more
wiley   +1 more source

Unloading Mechanical Behaviors of Clay Considering Initial Principal Stress Direction Effect: Experimental Study and Modified Constitutive Model. [PDF]

Materials (Basel)
Hu P, Zhang WX, Han Y, Song XH, Zhang L, Ruan JY, Liu JC.   +6 more
europepmc   +1 more source

Dynamic response at the terminus of oblique intersecting joints subjected to stress waves

Deep Underground Science and Engineering, EarlyView.
This study derives the propagation equation for stress waves impinging upon nonlinear oblique intersecting joints. It analyzes the dynamic response at the terminus of nonlinear oblique intersecting joints subjected to stress waves. Abstract To investigate the dynamic response at the terminus of oblique intersecting joints subjected to stress waves, a ...
Gang Hu, Xiang Chen, Honglu Fei, Shijie Bao, Jian Guo   +4 more
wiley   +1 more source

Regional variability in the Acheulian to Middle Stone Age transition in southern Africa. [PDF]

Sci Rep
Blackwood AF, Wilkins J, Arnold LJ, Demuro M, Boschian G, Caruana MV, Lalunio EF, Spate M, Hatton A, Muir RA, Wilson CG, Quick LJ, Meredith-Williams M, Herries AIR.   +13 more
europepmc   +1 more source

Advances in vital‐sign prediction and early‐warning models for underground coal mine workers integrating environmental factors

Deep Underground Science and Engineering, EarlyView.
This review synthesizes advances in predicting miners' vital signs by integrating environmental monitoring (dust, temperature, and gas) with physiological data. It highlights multi‐source data fusion techniques and early‐warning models for enhanced occupational safety in underground coal mines.
Junji Zhu, Dawei Cui, Yingjie Liu, Yuntao Liang, Yue Zhang   +4 more
wiley   +1 more source

Carbon emission assessment of tunnel infrastructures: From construction to operation

Deep Underground Science and Engineering, EarlyView.
This study develops a lifecycle carbon accounting framework for tunnel infrastructures, covering design, construction, operation, maintenance, and dismantling. Applied to a subsea tunnel case, the framework reveals the carbon emission distribution among four typical tunnel types and highlights potential carbon offset methods for low‐carbon tunnel ...
Luyuan Long, Wout Broere, Xuehui Zhang, Tian Xia, Richard de Nijs   +4 more
wiley   +1 more source

Earliest evidence of rice cultivation in Remote Oceania: Ritual use by the first islanders in the Marianas 3500 years ago. [PDF]

Sci Adv
Carson MT, Wang W, Huan X, Dong S, Hung HC, Deng Z.   +5 more
europepmc   +1 more source

Upper bound limit analysis of coral reef limestone cavern roof stability incorporating a tension‐shear failure mechanism with tensile‐strength cut‐off

Deep Underground Science and Engineering, EarlyView.
For the roof of coral reef limestone caverns, a novel tension‐shear composite failure mechanism was developed. The most critical tensile crack model was identified using a hybrid optimization algorithm, and the stability of the cavern roof was analyzed accordingly.
Dongsheng Xu, Chenxu Li, Chuantan Hou
wiley   +1 more source

Radiocarbon dating of Jerusalem's Siloam Dam links climate data and major waterworks. [PDF]

Proc Natl Acad Sci U S A
Regev J, Szanton N, Vukosavović F, Berko I, Shalev Y, Uziel J, Mintz E, Regev L, Boaretto E.   +8 more
europepmc   +1 more source

Origin and Function of Bitumen-Coated Torpedo Jars from the Sasanian to Early Islamic Period Fort of Fulayj in Oman. [PDF]

Molecules
Connan J, Priestman S, Engel MH, Zumberge A, Elezi G, Al-Jahwari NS.   +5 more
europepmc   +1 more source