Experimental study on discharge impact characteristics induced by piping failure of tailings dam

2021 ◽  
Vol 14 (19) ◽  
Author(s):  
Wu Shuaifeng ◽  
Cai Hong ◽  
Xiao Jianzhang ◽  
DU Jifang ◽  
Yan Jun ◽  
...  
Keyword(s):  
Experimental Study ◽  
Tailings Dam ◽  
Impact Characteristics

scholarly journals Mechanical and permeation response characteristics of basalt fibre reinforced tailings to different reinforcement technologies: an experimental study

2021 ◽  
Vol 8 (9) ◽  
pp. 210669
Author(s):  
Jianzhong Liu ◽  
Han Yang ◽  
Dongming Zhang ◽  
Yun Wang ◽  
Weijing Xiao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Permeability Coefficient ◽  
Friction Angle ◽  
Dam Failure ◽  
Tailings Dam ◽  
Compression Index ◽  
Basalt Fibre ◽  
Optimal Length ◽  
Response Characteristics ◽  
Soil Structures

Tailings dam is a man-made hazard with high potential energy; dam failure would cause great losses to human lives and properties. However, the limitations of conventional reinforcement methods like geosynthetic make it easy to slide along the weak structural plane. In this paper, we innovatively added basalt fibre (BF) with different lengths ( l ) and contents ( ω ) into tailings to study its mechanical and permeation characteristics. The results indicate that BF can improve the shear strength ( τ ), cohesion ( c ) and compression index ( C c ) of tailings, but it has little effect on internal friction angle ( φ ). When l is constant, τ , c and C c are positively correlated with ω . One notable phenomenon is that τ and c do not constantly increase with l when ω is constant, but obtain the maximum under the optimal length of 6 mm. Moreover, when ω > 0.6%, permeability coefficient ( k ) is greater than that of the original tailings and the sensitivity of c , φ , τ , C c , k to fibre content is greater than that of length. The research results facilitate the understanding of BF reinforced tailings, and could serve as references for improving the safety of tailings dam and other artificial soil slopes or soil structures.

scholarly journals Experimental study on hypervelocity impact characteristics of density-grade thin-plate

2014 ◽  
Vol 63 (2) ◽  
pp. 024701
Author(s):  
Hou Ming-Qiang ◽  
Gong Zi-Zheng ◽  
Xu Kun-Bo ◽  
Zheng Jian-Dong ◽  
Cao Yan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thin Plate ◽  
Hypervelocity Impact ◽  
Impact Characteristics

scholarly journals Experimental Study for the Impact Characteristics of Expanded EPP/EPS Foams

2013 ◽  
Vol 26 (6) ◽  
pp. 343-348 ◽  
Author(s):  
Han-Kook Kim ◽  
Byeoung-Jun Kim ◽  
Kwang-Young Jeong ◽  
Seong S. Cheon
Keyword(s):  
Experimental Study ◽  
Impact Characteristics ◽  
The Impact

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.

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