Results 241 to 250 of about 1,717 (280)

Identifying and Describing a Seismogenic Zone in a Sublevel Caving Mine

Rock Mechanics and Rock Engineering, 2016
Analysis of caving-induced seismicity can aid in the understanding of rock mass behaviour in the different stages of the caving process. A detailed analysis of caving-induced seismicity at the Telfer sublevel caving mine was undertaken. Interpretation of seismic data in the Telfer mine showed the influence of the major geological features on cave ...
Yousef Abolfazlzadeh, Marty Hudyma
exaly   +2 more sources

Development Law of Water-Conducting Fracture Zone in the Fully Mechanized Caving Face of Gob-Side Entry Driving: A Case Study

Minerals (Basel, Switzerland), 2022
This study is aimed at exploring the influence of narrow coal pillars in gob-side entry driving (GSED) on the development height of the water-conducting fracture zone (WCFZ) in the fully mechanized caving face.
Yi Tan, Weitao Yan, Wenbing Guo
exaly   +2 more sources

Study of multiple draw-zone interaction in block caving mines by means of a large 3D physical model [PDF]

International Journal of Rock Mechanics and Minings Sciences, 2008
Current production level design guidelines in block caving mines are based on the concept of interaction of movement zones and the spacing of draw-points at which mass flow is achieved.
A Halim
exaly   +2 more sources

Cryogenic Cave Pearls In the Periglacial Zones of Ice Caves

Journal of Sedimentary Research, 2013
Abstract The Carpathian Mountains across Slovakia and Romania are home of several ice caves located at elevations between 700 and 1,200 m above sea level (asl). Although the mean surface annual temperature is above the freezing point, perennial ice deposits are common in caves and shafts with certain morphologies (large entrances followed by steep ...
Žák, Karel, Orvošová, Monika, Filippi, Michal, Vlček, Lukáš, Onac, Bogdan P., Perşoiu, Aurel, Rohovec, Jan, Světlík, Ivo   +7 more
openaire   +2 more sources

Use of Twilight Zones of Caves by Plethodontid Salamanders

Copeia, 2007
Abstract We studied the use of six caves by metamorphosed plethodontid salamanders from 2000–2005 in the Cumberland Plateau of northwestern Georgia. Nine species were observed, the most abundant being, in descending order, Eurycea lucifuga, Plethodon glutinosus, P. petraeus, and E. longicauda. Eurycea lucifuga and P.
Carlos D. Camp, John B. Jensen
openaire   +1 more source

Biodiversity of Fungi in the photic and aphotic zones of Montenegro caves

Aerobiologia, 2020
For the first time, the composition of micromycetes communities was investigated in both photic and aphotic entrance zones of seven caves in Montenegro: Obodska Pecina, Golubinja Pecina, Velustica Pecina, Vrbacka jama, Jama ER-1, Njegos Pecina, and an unnamed cave. In total, 72 species of micromycetes were identified: 46 species from illuminated photic
Ekaterina V. Kozlova, Svetlana E. Mazina
openaire   +2 more sources

Ice caves and permafrost zones in Southwest Alberta

ERDKUNDE, 1979
Zusammenfassung: Eishohlen und Permafrost in Sudwest Alberta Drei Typen von Eishohlen kommen in Siidwest-Alberta vor. Plateauberg-Eishohlen sind fiir die Art typisch, die unmittelbar unterhalb der Zone standigen Permafrostes ge bildet werden, wo sich Eis an den Wanden aufgrund zuriick gezogenen Permafrostes in Felsen bildet. Canyon-Creek Eishohlen sind
openaire   +1 more source

Four seasons of the phototrophic biofilms at the cave entrance zone of Petnica Cave

Ecological Research
Abstract This study investigated seasonal variations in phototrophic biofilm communities at the entrance zone of Petnica Cave. Biofilm samples were collected from seven sampling sites over four seasons. Several parameters were measured at each site, including air temperature, relative humidity, light intensity, substrate temperature ...
Kristina Petrović, Ana Graovac, Jelena Knežević, Vesna Karadžić, Ivana Trbojević, Olga Jakovljević, Slađana Popović   +6 more
openaire   +1 more source

The Isolated Extraction Zone in Block Caving — A Review

Proceedings of the First Southern Hemisphere International Rock Mechanics Symposium, 2008
This paper reviews previous work on the Isolated Extraction Zone (IEZ) in Block Caving, and in particular, the parameters and mechanisms controlling the shape of the IEZ. Previous work is divided into four separate approaches namely: scaled physical modelling; numerical modelling; full scale marker trials; and empirical relations from site observations.
openaire   +1 more source

Joint operation of fans in ventilation networks with zones of caving

Soviet Mining Science, 1968
1. For ventilation networks with uniform aerodynamic resistances (in the absence of zones of caving), for which, in the range of air flow rates used in mine ventilation, the quadratic resistance law is valid, the air fed to the individual branches as a percentage of the total air feed to the network remains constant and does not depend on the total ...
A. D. Vasserman, S. P. Alekhichev
openaire   +1 more source