Rockburst: Mechanisms, Monitoring, Warning, and Mitigation

0481789 - ÚGN 2019 GB eng M - Část monografie knihy
Koníček, Petr
Destressing.
Rockburst: Mechanisms, Monitoring, Warning, and Mitigation. 1. Cambridge: Butterworth-Heinemann, Elsevier, 2017 - (Feng, X.), s. 453-470. ISBN 978-0-12-805054-5
Institucionální podpora: RVO:68145535
Klíčová slova: destressing * preconditioning * rockbursts * underground coal mining
Obor OECD: Mining and mineral processing
https://www.elsevier.com/books/rockburst/feng/978-0-12-805054-5

Destressing, or preconditioning as it was initially called (hereafter destressing), was first introduced as a means of ameliorating rockburst conditions in the deep mines of South Africa in the 1950s (Roux, Leeman, & Denkhaus, 1957), in spite of the fact that the first use of destress blasting was in the 1930s in underground coal mining (Springhill Colliery, Nova Scotia, Canada, Saharan & Mitri, 2009). The principle on which destressing was based at that time was the reduction of rockburst occurrences or a decrease in their violence by increasing the depth of the fracture zone at the face of the underground opening. The argument for this was based on the concept that, if destressing is carried out ahead of an advancing underground opening, the depth of the fracturing would be advanced, and in so doing, the high-stress zone would be transferred farther away from the face into the solid rock mass. Moreover, if sudden failure should occur in the high-stress zone, only limited damage would result, because of the cushion effect of the destressed zone ahead of the face.In the beginning, however, despite these clear benefits, destressing was not generally accepted by mines as a suitable and safe prevention technique (Toper, Kabongo, Stewart, & Daehnke, 2000). After a period of investigations and research projects in South African gold mines in the 1980s and 1990s (Adams, Jager, & Roering, 1981, Adams, Gay, & Cross, 1993, Brummer & Rorke, 1988, Lightfoot, Goldbach, Kullmann, & Toper, 1996, Rorke, Cross, Van Antwerpen, & Noble, 1990, Toper, Grodner, Steward, & Lightfoot, 1997) destressing is now used as a standard rockburst measure across the many mining regions around the world (Konicek, Konecny, & Ptacek, 2011, Konicek, Saharan, & Mitri, 2011,
Mitri & Saharan, 2005).

Trvalý link: http://hdl.handle.net/11104/0277274