Results 151 to 160 of about 2,521,798 (304)

Efficiency increase of the excavator walking mechanism [PDF]

News of the Ural State Mining University, 2017
N. M. Suslov, V. A. Borovkov, P. A. Kas'yanov   +2 more
openaire   +1 more source

Views of Brown\u27s Park and Jarvie Excavation Site [93]

, 1987
Photo shows miscellaneous glass artifacts that were found during the Jarvie excavation, Browns Park, Utah, taken in ...

core  

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Deformation mechanism and mechanical response of coal mine roadway roof in the unsupported area during rapid tunneling. [PDF]

Sci Rep
Wang S, Yang S, Guo W, Ma L, Yu Z, Wang P.   +5 more
europepmc   +1 more source

Study on the composite fracture characteristics of filling and reinforcing cracked rock mass after high temperature damage

Deep Underground Science and Engineering, EarlyView.
Cement infill shares compressive and shear stresses during loading, while interfacial friction hinders crack propagation and reduces stress concentration, improving the rock's load‐bearing capacity. Failure modes vary with crack inclination. Unfilled specimens show four modes.
Shihao Yuan, Qiang Sun, Jianjun Hu, Liwei Zhang, Jishi Geng   +4 more
wiley   +1 more source

Projective Indicators of Underlying Dental Anxiety in Children with Positive Frankl Behavior: A Draw-a-Person Assessment During Caries Removal. [PDF]

Children (Basel)
Lazarova Z, Mitova N.
europepmc   +1 more source

Views of Brown\u27s Park and Jarvie Excavation Site [89]

, 1987
Photo shows four sauce bottles, labeled a through d, these were found during the Jarvie excavation, Browns Park, Utah, taken in ...

core  

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

Asymmetric deformation law and differentiated control technique for the roadway of an isolated working face in an extra-thick coal seam. [PDF]

Sci Rep
Wu H, Gong P, Zhao T, Bai L, Yan J, Liu A.   +5 more
europepmc   +1 more source

Views of Brown\u27s Park and Jarvie Excavation Site [74]

, 1987
Photo shows one large whiskey bottle and fragments of another bottle found during the Jarvie excavation, Browns Park, Utah, taken in ...

core