资源环境与城乡规划管理外文翻译文献.docx

资源环境与城乡规划管理外文翻译文献.docx资源环境与城乡规划管理外文翻译文献
（文档含中英文对照即英文原文和中文翻译）
Cyclical salt efflorescence weathering: an invisible threat to
the recovery of underground mine environment for tourist exploitation
J. Matias Penas Castejon • J. Francisco Macia Sanchez •
M a Pilar Jimenez Medina • M a Jesus Pen alver Martinez
Received: 30 April 2013/Accepted: 25 January 2014/Published online: 11 February 2014
© Springer-Verlag Berlin Heidelberg 2014
Abstract Enhancing the value of an underground mine environment for tourist exploitation involves altering the physico-chemical balance of stone materials whose original mechanical properties guaranteed the structural stability of the site's galleries and chambers・ Humidity and temperature changes caused by the public exhibition of this kind of assets are the main causes of
such disorders. After the inten^ention in the Agmpa-Vicenta mine in La Union (Spain) there were still runofTwater leaks into the mine. These water runoffs through the fault and schistosity planes of the enclosing rock mass give rise to salt precipitation over time. Adapting this mine and turning it into a museum have meant a decrease in relative indoors humidity and an in crease in temperature・ These variations have caused rocks, which were stable in the original conditions, to increase their rate of physico-chemical weathering due to the polycyclic supergene alteration of the metal sulfides they contain. The resulting release of sulfates into the solution and their subsequent precipitation as single and double salt efflorescence causes haloclasty, deteriorating the rock's mechanical properties and diminishing the staictural stability of the operation. This paper presents the results of characterizing the supergene mineral phases of salt efflorescence in the rock bed enclosing an underground sulfide mine value enhanced for tourist exploitation. Dangers for the structural stability of this type of architectural intervention, associated to the formation of efflorescences, are also ide