Results 191 to 200 of about 269,599 (304)

Orogeny and topography influenced Jurassic-Cretaceous terrestrial ecosystem evolution in northeastern Asia. [PDF]

Natl Sci Rev
Wang N, Zhang Z, Luffi P, Li Z, Spicer RA, Yu Z, Wan B, Zhu JJ, Zhang J, Ao S, Song D, Xiang D, Guo C, Xiao W.   +13 more
europepmc   +1 more source

Review and prospects of shear test of bolted rock joints

Deep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren, Fan Yang, Manchao He, Yong Yuan, Zhigang Tao   +4 more
wiley   +1 more source

Isotopic evidence for volatile loss driven by South Pole-Aitken basin-forming impact. [PDF]

Proc Natl Acad Sci U S A
Tian HC, Zhang C, Li WJ, Xue D, Wang J, Yang W, Liu YH, Lin Y, Li XH, Wu FY.   +9 more
europepmc   +1 more source

Temperature‐dependent shear behavior and constitutive model of the rock–concrete interface

Deep Underground Science and Engineering, EarlyView.
Shear tests were conducted to investigate the temperature‐dependent shear behavior of the rock–concrete interface, highlighting the interaction between the surrounding rock and the lining during tunnel fires. Under experimental conditions, concrete exhibited greater temperature sensitivity than rock, with the shear fracture surface transitioning from ...
Hongbin Chen, Yujing Jiang, Rui Pan, Bin Wang, Sunhao Zhang, Jinge Zhang, Xianzhuang Ma   +6 more
wiley   +1 more source

Earth system instability explains redox paradox during late Cambrian SPICE event. [PDF]

Sci Adv
Sheng K, Li ZH, Zhou JL, Lin YB, Xiong GL, Ren GY, Chen ZQ, Lenton TM, Shen SZ, Zhang F.   +9 more
europepmc   +1 more source

Shear behavior of bolt–grout interfaces under constant normal stiffness: Influence of grout strength and thickness

Deep Underground Science and Engineering, EarlyView.
The effects of grout strength and thickness on the shear behavior of bolt–grout interfaces (BGI) under constant normal stiffness conditions are investigated. Shear strength, failure modes, and acoustic emission characteristics are examined. The findings reveal that grout strength exerts a significantly greater influence on BGI shear strength and ...
Sunhao Zhang, Dongqi Shang, Yujing Jiang, Jinge Zhang, Hongbin Chen, Tianqi Jiang   +5 more
wiley   +1 more source

Lead in archived hair documents a decline in lead exposure to humans since the establishment of the US Environmental Protection Agency. [PDF]

Proc Natl Acad Sci U S A
Cerling TE, Fernandez DP, Smith KR.
europepmc   +1 more source

A review on rockburst prediction and prevention to shape an ontology‐based framework for better decision‐making for underground excavations

Deep Underground Science and Engineering, EarlyView.
A scientometric analysis of 2449 journal articles and a comprehensive review of 336 papers were conducted, discussing and identifying challenges and research gaps in rockburst prediction and prevention and proposing an ontology‐based framework for better decision‐making in underground excavations. Abstract With underground engineering projects becoming
Hongchuan Yan, Haijiang Li, Hongqiang Xie, Mingli Xiao, Jianliang Pei, Huaizhong Liu, Jiangda He   +6 more
wiley   +1 more source

The billion-dollar case for sustaining palaeontology's digital databases. [PDF]

Nat Ecol Evol
Dowding EM, Dunne EM, Collins KS, Cryer K, De Baets K, Dimitrijević D, Edie SM, Finnegan S, Kiessling W, Lintulaakso K, Liow LH, Little H, Na L, Peters SE, Renaudie J, Saupe EE, Seuss B, Sessa JA, Smith JA, Uhen MD, Williams JW, Kocsis ÁT.   +21 more
europepmc   +1 more source

Investigation on hard‐rock breaking performance and auxiliary mechanism of picks assisted with both‐sided high‐pressure water jets

Deep Underground Science and Engineering, EarlyView.
This paper investigates the high‐pressure water jet‐pick combined rock‐breaking mode (HPC), which employs high‐pressure water jets to precut grooves on both sides of the picks. The rock‐breaking patterns and performance of the HPC method are obtained, and the auxiliary rock‐breaking mechanism of water jet grooving is revealed.
Jingjing Lu, Jiancheng Xiao, Hui Zhou, Xiao Ma, Congcong Hou, Jian Cui, Fujian Yang   +6 more
wiley   +1 more source