scholarly journals Experimental Tests on a Small-Scale Model of a Mine Stope to Study the Behavior of Waste Rock Barricades during Backfilling

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 941
Author(s):  
Mutaz Nujaim ◽  
Tikou Belem ◽  
Albert Giraud
Keyword(s):  
Volumetric Strain ◽  
Experimental Tests ◽  
Waste Rock ◽  
Scale Model ◽  
Small Scale ◽  
Downstream Face ◽  
Solid Mass ◽  
The Stability ◽  
Reduced Scale ◽  
Small Scale Model

This paper presents a reduced-scale physical model of a mine stope used to reproduce the underground stope backfilling practiced in some Canadian mines. The objective is to study the geomechanical behavior of the waste rock barricades in interaction with the mine backfill. The instrumentations, along with visual observations and preliminary results, are presented. The main results demonstrated that: (i) the stability of the barricade depends on its physical properties (e.g., size, location, particles gradation and compaction) and the frictional behavior at the barricade/drift walls interface, and (ii) for two backfill formulations, cemented and uncemented, prepared with 70% of solid mass concentration, the volumetric strain due to self-weight consolidation of the backfilled room was higher for uncemented backfill (16%) than for the cemented one (4.5%). In addition, the results highlighted the importance of using shotcrete around the downstream face of the barricade, mostly at the top, to close the gaps and bind the barricade particles, which improves its stability.

scholarly journals Influence of the Existing Cavern on the Stability of Adjacent Tunnel Excavation by Small-Scale Model Tests

2014 ◽  
Vol 15 (12) ◽  
pp. 117-128
Author(s):  
Minchul Jung ◽  
Jungsoon Hwang ◽  
Jongseob Kim ◽  
Seungwook Kim ◽  
Seungcheol Baek
Keyword(s):  
Model Tests ◽  
Scale Model ◽  
Small Scale ◽  
Tunnel Excavation ◽  
The Stability ◽  
Small Scale Model

Wave Energy Hyperbaric Device for Electricity Production

2007 ◽  
Author(s):  
Segen F. Estefen ◽  
Paulo Roberto da Costa ◽  
Eliab Ricarte ◽  
Marcelo M. Pinheiro
Keyword(s):  
Power Generation ◽  
Wave Energy ◽  
Experimental Results ◽  
Electricity Production ◽  
Scale Model ◽  
Small Scale ◽  
Regular Waves ◽  
Hyperbaric Chamber ◽  
Small Scale Model

Wave energy is a renewable and non-polluting source and its use is being studied in different countries. The paper presents an overview on the harnessing of energy from waves and the activities associated with setting up a plant for extracting energy from waves in Port of Pecem, on the coast of Ceara State, Brazil. The technology employed is based on storing water under pressure in a hyperbaric chamber, from which a controlled jet of water drives a standard turbine. The wave resource at the proposed location is presented in terms of statistics data obtained from previous monitoring. The device components are described and small scale model tested under regular waves representatives of the installation region. Based on the experimental results values of prescribed pressures are identified in order to optimize the power generation.

Staged-Air Ratio Optimization for a New Down-Fired Technology within a Cold Small-Scale Model of a 350 MWeUtility Boiler

2011 ◽  
Vol 25 (4) ◽  
pp. 1485-1496 ◽  
Author(s):  
Min Kuang ◽  
Zhengqi Li ◽  
Pengfei Yang ◽  
Jinzhao Jia ◽  
Qunyi Zhu
Keyword(s):  
Scale Model ◽  
Small Scale ◽  
Ratio Optimization ◽  
Small Scale Model

scholarly journals Monitoring deformation of small scale model tunnels under load testing

Survey Review ◽  
2014 ◽  
Vol 46 (339) ◽  
pp. 417-425 ◽  
Author(s):  
H-M. Chen ◽  
M. Smith ◽  
H-S. Yu ◽  
N. Kokkas
Keyword(s):  
Scale Model ◽  
Small Scale ◽  
Load Testing ◽  
Small Scale Model

A small-scale model of factor VIII and factor IX fractionation from plasma

1989 ◽  
Vol 10 (4) ◽  
pp. 279-286 ◽  
Author(s):  
Peter Feldman ◽  
Lowell Winkelman ◽  
Helen Evans ◽  
Martin Pinnell ◽  
Fiona Murdoch ◽  
...  
Keyword(s):  
Factor Viii ◽  
Factor Ix ◽  
Scale Model ◽  
Small Scale ◽  
Small Scale Model

A Small Scale Model for Seismic Imaging Systems

1972 ◽  
pp. 195-213 ◽  
Author(s):  
M. G. Maginness ◽  
G. B. Cook ◽  
L. G. Higgens
Keyword(s):  
Seismic Imaging ◽  
Imaging Systems ◽  
Scale Model ◽  
Small Scale ◽  
Small Scale Model
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