Measurements of humidity-enhanced salt creep in salt mines: Proving the Joffe effect

2012 ◽  
pp. 193-198
Keyword(s):  
Salt Mines ◽  
Salt Creep

Ancient Salt Mines of the Indians

1926 ◽  
Vol 135 (2) ◽  
pp. 116-117 ◽  
Author(s):  
M. R. Harrington
Keyword(s):  
Salt Mines

Analysis of Casing Strength after Casing Wear in Ultra-Deep Rock Salt Formation

2012 ◽  
Vol 616-618 ◽  
pp. 538-542 ◽  
Author(s):  
Fu Xiang Zhang ◽  
Wei Feng Ge ◽  
Xiang Tong Yang ◽  
Wei Zhang ◽  
Jian Xin Peng
Keyword(s):  
Rock Salt ◽  
Coupling Effect ◽  
Equivalent Stress ◽  
Horizontal Stress ◽  
In Situ Stress ◽  
Attrition Rate ◽  
Salt Formation ◽  
Salt Creep ◽  
Casing Wear

To alleviate the problems of casing collapse induced by the coupling effect of rock salt creep and casing wear, the effects of salt creep, attrition rate and casing abrasive position on the equivalent stress on casings in non-uniform in-situ stress field is analyzed by finite-difference model with worn casing, cement and salt formation. It indicates that, creep reduces the yield strength of worn casing to a certain extent; Equivalent stress on casings is bigger and more non-uniform when the abrasion is more serious; Wear position obviously changes the distribution of equivalent stress on casing, and when the wear located along the direction of the minimum in-situ stress, equivalent stress on casing could be the largest that leads to the casing being failed more easily. Equivalent stress on casings increases gradually with creep time increasing and will get to balance in one year or so; In addition, new conclusions are obtained which are different from before: the maximum equivalent stress on casings is in the direction of the minimum horizontal stress, only when the attrition rate of the casing is little; otherwise, it is not. This method could help to improve the wear prediction and design of casings.

Radon levels assessment in some Northern Romanian salt mines

2012 ◽  
Vol 293 (2) ◽  
pp. 565-572 ◽  
Author(s):  
Marian Romeo Calin ◽  
Maria Zoran ◽  
Mihaela Antonina Calin
Keyword(s):  
Salt Mines

scholarly journals Polish salt-mines: Zlotys for church conservation

Nature ◽  
1983 ◽  
Vol 304 (5924) ◽  
pp. 299-299
Author(s):  
Vera Rich
Keyword(s):  
Salt Mines

scholarly journals The therapeutic effect of a person staying in a salt mine due to the low background level of atomic radiation

2020 ◽  
Vol 17 (5) ◽  
pp. 279-283
Author(s):  
Gayaz H. Harisov ◽  
Aleksander G. Zavorotny
Keyword(s):  
Experimental Study ◽  
Therapeutic Effect ◽  
Salt Spray ◽  
Background Level ◽  
Salt Mine ◽  
Low Background ◽  
Salt Mines ◽  
Low Levels

The therapeutic effect of people staying in salt mines is currently explained by the fact that people inhale salt spray particulates. Based on an experimental study, the article proves that this therapeutic effect is the result of super-low levels of atomic radiation in the space of salt mines.

scholarly journals Long-term time-lapse microgravity and geotechnical monitoring of relict salt mines, Marston, Cheshire, U. K.

Geophysics ◽  
2012 ◽  
Vol 77 (6) ◽  
pp. B287-B294 ◽  
Author(s):  
Jamie K. Pringle ◽  
Peter Styles ◽  
Claire P. Howell ◽  
Michael W. Branston ◽  
Rebecca Furner ◽  
...  
Keyword(s):  
Time Lapse ◽  
Ground Subsidence ◽  
Near Surface ◽  
Geotechnical Monitoring ◽  
Salt Mines ◽  
History Of ◽  
Mine Workings ◽  
The Village ◽  
The Town

The area around the town of Northwich in Cheshire, U. K., has a long history of catastrophic ground subsidence caused by a combination of natural dissolution and collapsing abandoned mine workings within the underlying Triassic halite bedrock geology. In the village of Marston, the Trent and Mersey Canal crosses several abandoned salt mine workings and previously subsiding areas, the canal being breached by a catastrophic subsidence event in 1953. This canal section is the focus of a long-term monitoring study by conventional geotechnical topographic and microgravity surveys. Results of 20 years of topographic time-lapse surveys indicate specific areas of local subsidence that could not be predicted by available site and mine abandonment plan and shaft data. Subsidence has subsequently necessitated four phases of temporary canal bank remediation. Ten years of microgravity time-lapse data have recorded major deepening negative anomalies in specific sections that correlate with topographic data. Gravity 2D modeling using available site data found upwardly propagating voids, and associated collapse material produced a good match with observed microgravity data. Intrusive investigations have confirmed a void at the major anomaly. The advantages of undertaking such long-term studies for near-surface geophysicists, geotechnical engineers, and researchers working in other application areas are discussed.

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