Results 141 to 150 of about 346,667 (337)

Stress analysis of crack characteristic of anthracite under dynamic loading

Deep Underground Science and Engineering, EarlyView.
In this article, the dynamic compression test of anthracite under five strain rates is carried out, the evolution law of three kinds of crack characteristic stress is analyzed, and a prediction model of the crack characteristic stress threshold considering the strain rate effect is established. Then, the rationality of crack characteristic stress under
Yun Bai, Feng Gao, Ning Luo, Zhizhen Zhang, Yue Niu, Shanjie Su   +5 more
wiley   +1 more source

Optimization of Binocular Vision Ranging Based on Sparse Stereo Matching and Feature Point Extraction

IEEE Access
In recent years, the advancement in ranging accuracy and distance requirements in the ship industry has underscored the paramount importance of controlling ranging error.
Zhiliang Chen, Wei Zhang, Shilin Li, Kaixiong Zhu, Huiyuan Chen   +4 more
doaj   +1 more source

A Needed Invention in Coal-Mining [PDF]

, 1887
Henry M. Howe
openalex   +1 more source

Slit tube responses and rock fracture characteristics in slit charge blasting under high in situ stress

Deep Underground Science and Engineering, EarlyView.
In this article, the finite element method‐smoothed particle hydrodynamics adaptive coupling algorithm is applied to numerically simulate and analyze the dynamic response of the slit tube and the crack propagation under high in situ stress. The dynamic response of the slit tube mainly exhibits radial response in the vertical direction of the slit and ...
Zhe Sui, Liyun Yang, Lijun Wu, Chenxi Ding   +3 more
wiley   +1 more source

ASPECTS OF PHYSICAL PHENOMENA IN MINING FOR THE WESTERN DONBASS [PDF]

, 2018
On the base of statistic definition of the maps of underground mining in Western Donbass and using the special software it was acquainted with physical and geological phenomena for coal ...
POPOV, Dmytrо
core  

DISCUSSION. ELECTRIC MINING-MACHINERY, WITH SPECIAL REFERENCE TO THE APPLICATION OF ELECTRICITY TO COAL-CUTTING, PUMPING, AND ROCK-DRILLING. [PDF]

, 1891
SIR J COODE, L B ATKINSON, A T SNELL, A LUPTON, A GROTHE, E BAINBRIDGE, T PARKER, F BRAIN, G FORBES, J TAYLOR, L N FOSTER, C W ROBERTS, H SMITH, R.E. Crompton, A SOPWITH, S F WALKER, R BOLTON, H ROBINSON, T E CANDLER, F HURD, E R DOLBY, H D PEARSALL, A P TROTTER, H W RAVENSHAW, C W ATKINSON   +24 more
openalex   +1 more source

Experimental and constitutive modeling investigations on marble in Jinping Underground Laboratory

Deep Underground Science and Engineering, EarlyView.
The objective of this study is to reveal the underlying mechanisms behind the brittle‐ductile transition of the marble through a combination of experimental research and constitutive modeling. A series of triaxial compression and triaxial cyclic loading tests are conducted.
Susheng Wang, Qiang Zhang, Hao Luo, Zhinan Lin   +3 more
wiley   +1 more source

Investigation of Load Characteristics and Stress-Energy Evolution Laws of Gob-Side Roadways Under Thick and Hard Roofs

Applied Sciences
The stress environments of gob-side roadways (GSRs) are becoming increasingly complex during deep coal mining under thick and hard roofs. This leads to strong strata behaviors, including roadway floor heave, roof subsidence, and even coal bursts.
Jinlong Zhou, Junfeng Pan, Yongxue Xia, Wengang Liu, Taotao Du, Jianhong Wu   +5 more
doaj   +1 more source

Have Prices of Internationally Traded Steam Coal been Marginal Cost Based? [PDF]

During 2007 and 2008 steam coal prices soared to unprecedented levels. Since then much has been speculated about the drivers of these price peaks. This paper is concerned with the costs of steam coal allocation in the seaborne market and their influence ...
Paulus, Moritz, Trueby, Johannes
core  

An Elementary Class-book of Practical Coal-mining [PDF]

, 1904

openalex   +1 more source