Results 231 to 240 of about 163,069 (305)

142400 - Hydraulic Elevators [PDF]

, 2016
Weatherbee, Stephanie
core   +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

Quantification and Analysis of Hydrograph Behavior Using Groundwater Signatures. [PDF]

Ground Water
Collenteur RA, Vonk MA, Haaf E.
europepmc   +1 more source

Labor Relations Division, Central New York Region, Associated General Contractors of America, New York State Chapter, Inc. (Heavy - Highway) and International Union of Operating Engineers (IUOE), AFL-CIO, Local 545 (2001) [PDF]

, 2001

core   +1 more source

Experimental study on burning rate and flame geometry in construction tunnel fires under high geothermal conditions

Deep Underground Science and Engineering, EarlyView.
Abstract As tunnel construction advances in lengths and depths, the construction of tunnels in high geothermal environments has become increasingly common, raising significant fire risks. In this study, a 1:20 scale model tunnel test platform was constructed to investigate the effects of a high geothermal environment on fire behavior in tunnels during ...
Xiaoxian Fei, Maozhen Liu, Jiayi Ha, Linbo Du, Zhi Li, Yuhao Li, Chuangang Fan   +6 more
wiley   +1 more source

Daily noise dose and power tool characterization of steel stud framers on commercial construction sites. [PDF]

Ann Work Expo Health
Schutt D, Lipsey T, Van Dyke M, Brazile WJ.   +3 more
europepmc   +1 more source

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

Deep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang, Yonghua Ye, Jianping Zuo, Baojiang Han, Weigang Jiao   +4 more
wiley   +1 more source

Investigation of a Modular High-Pressure Heat Exchanger with Metal Foam Packing for a Pneumatic-Hydraulic Drive. [PDF]

Materials (Basel)
Dyga R, Brol S.
europepmc   +1 more source

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

Deep Underground Science and Engineering, EarlyView.
Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

Detection and imaging of chemicals and hidden explosives using terahertz time-domain spectroscopy and deep learning. [PDF]

Light Sci Appl
Jiang X, Li Y, Li Y, Shen CY, Ozcan A, Jarrahi M.   +5 more
europepmc   +1 more source