The sliding instability of rock roof block induced by vertical dynamic disturbance: An experimental study

2021 ◽  
Vol 143 ◽  
pp. 104799
Author(s):  
Feng Dai ◽  
Wancheng Zhu ◽  
Leilei Niu ◽  
Chen Hou ◽  
Yongjun Yu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Dynamic Disturbance ◽  
Sliding Instability

Experimental Study of Remotely Triggered Rockburst Induced by a Tunnel Axial Dynamic Disturbance Under True-Triaxial Conditions

2017 ◽  
Vol 50 (8) ◽  
pp. 2207-2226 ◽  
Author(s):  
Guoshao Su ◽  
Xiating Feng ◽  
Jinhuan Wang ◽  
Jianqing Jiang ◽  
Lihua Hu
Keyword(s):  
Experimental Study ◽  
Dynamic Disturbance ◽  
True Triaxial

Influence of Dynamic Disturbance on the Creep of Sandstone: An Experimental Study

2018 ◽  
Vol 52 (4) ◽  
pp. 1023-1039 ◽  
Author(s):  
Wancheng Zhu ◽  
Shaohua Li ◽  
Shuai Li ◽  
Leilei Niu
Keyword(s):  
Experimental Study ◽  
Dynamic Disturbance

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study
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