Determination of Granite Rock Massif Weathering and Cracking of Surface Layers in the Oldest Parts of Medieval Mine Depending on Used Mining Method
| Autor: | Zdeněk Kaláb, Markéta Lednická |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
geography
geography.geographical_feature_category National heritage Weathering 02 engineering and technology Massif 010502 geochemistry & geophysics 01 natural sciences 020501 mining & metallurgy Cracking Schmidt hammer 0205 materials engineering Mining engineering Ultrasonic pulse velocity Geology 0105 earth and related environmental sciences Rock blasting |
| Zdroj: | Archives of Mining Sciences. 61:381-395 |
| ISSN: | 1689-0469 |
| Popis: | The paper presents the use of selected non-destructive testing methods for the purpose of specifying information on weathering and cracking of surface layers of granite rock massif in the medieval Jeroným Mine (the Czech Republic). This mine has been declared the National Heritage Site of the Czech Republic and its opening as a mining museum to the public is gradually prepared. Geological and geomechanical evaluation documents the possibility to find all kinds of weathering grades of rock massif in this mine. Two non-destructive methods have been tested, namely the measurement of ultrasonic pulse velocity and the measurement of Schmidt hammer rebound value. Field measurements were performed in two selected galleries to verify the application of such methods in specific conditions of underground spaces. Used mining method is one of the parameters later influencing cracking of rock massif. In selected galleries, two different mining methods were used which means that a part of a gallery profile was mined out by hand tools in the Middle Ages and another part of the profile was later mined out by blasting. Measurements in these galleries have enabled to analyse the influence of used mining methods on cracking of rock massif in the impaired zone, and, consequently, on ongoing weathering processes in those zones. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|