Stability of a horizontal mine working in an orthotropic massif

1977 ◽  
Vol 13 (4) ◽  
pp. 349-352
Author(s):  
L. V. Deriglazov
Keyword(s):  
Mine Working ◽  
Horizontal Mine Working

Stress state of saturated porous mass near a horizontal mine working

1979 ◽  
Vol 15 (3) ◽  
pp. 185-191
Author(s):  
L. P. Khoroshun ◽  
R. M. Israfilov
Keyword(s):  
Stress State ◽  
Mine Working ◽  
Porous Mass ◽  
Horizontal Mine Working

Engineering aspects of the mine working development in difficult hydrogeological conditions

2019 ◽  
pp. 132-141
Author(s):  
V.G. Hrinov ◽  
◽  
A.A. Khorolskyi ◽  
Yu.O. Vynohradov ◽  
◽  
...  
Keyword(s):  
Mine Working ◽  
Hydrogeological Conditions

Method of smooth particle hydrodynamics for simulation the failure and relief of the roof of mine working

2018 ◽  
Vol 11 (49) ◽  
pp. 464-475
Author(s):  
Malinnikova O.N. ◽  
◽  
Troimov V.A. ◽  
Shipovskii I.E. ◽  
◽  
...  
Keyword(s):  
Mine Working ◽  
Smooth Particle Hydrodynamics ◽  
Particle Hydrodynamics

scholarly journals Interference Mitigation for Visible Light Communications in Underground Mines Using Angle Diversity Receivers

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 367 ◽  
Author(s):  
Pablo Palacios Játiva ◽  
Milton Román Cañizares ◽  
Cesar A. Azurdia-Meza ◽  
David Zabala-Blanco ◽  
Ali Dehghan Firoozabadi ◽  
...  
Keyword(s):  
Visible Light ◽  
Mine Working ◽  
Channel Model ◽  
Underground Mining ◽  
Cumulative Distribution ◽  
Line Of Sight ◽  
Delay Spread ◽  
Noise Power ◽  
Working Face ◽  
Angle Diversity

This paper proposes two solutions based on angle diversity receivers (ADRs) to mitigate inter-cell interference (ICI) in underground mining visible light communication (VLC) systems, one of them is a novel approach. A realistic VLC system based on two underground mining scenarios, termed as mining roadway and mine working face, is developed and modeled. A channel model based on the direct component in line-of-sight (LoS) and reflections of non-line-of-sight (NLoS) links is considered, as well as thermal and shot noises. The design and mathematical models of a pyramid distribution and a new hemi-dodecahedral distribution are addressed in detail. The performances of these approaches, accompanied by signal combining schemes, are evaluated with the baseline of a single photo-diode in reception. Results show that the minimum lighting standards established in both scenarios are met. As expected, the root-mean-square delay spread decreases as the distance between the transmitters and receivers increases. Furthermore, the hemi-dodecahedron ADR in conjunction with the maximum ratio combining (MRC) scheme, presents the best performance in the evaluated VLC system, with a maximum user data rate of 250 Mbps in mining roadway and 120 Mbps in mine working face, received energy per bit/noise power of 32 dB and 23 dB, respectively, when the bit error rate corresponds to 10 − 4 , and finally, values of 120 dB in mining roadway and 118 dB in mine working face for signal-to-interference-plus-noise ratio are observed in a cumulative distribution function.

Photomechanical investigation of the stress—Strain state of a precast-block support in a mine working

1980 ◽  
Vol 16 (1) ◽  
pp. 6-10
Author(s):  
V. F. Trumbachev ◽  
O. K. Slavin ◽  
G. K. Kuchuashvili
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State

The Influence of the Central Prop Stays of the Strengthening Support on the Fastening System Stress-Strain State of Mine Working

2020 ◽  
pp. 90-105
Author(s):  
V. Bondarenko ◽  
I. Kovalevska ◽  
H. Symanovych ◽  
M. Barabash ◽  
V. Chervatiuk ◽  
...  
Keyword(s):  
Mine Working ◽  
Strain State ◽  
Stress Strain ◽  
Stress Strain State
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