Stability analysis of raise bored shaft in balya mine, Turkey

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Özet

Raise boring machines are used for excavation of shafts and other vertical structures in mining and civil engineering fields for material and human transportation and ventilation purposes. In the classical raise bore method, machine from the top of the shaft begin to drill a pilot hole down to the required depth. Then, the pilot drill bits are removed and replaced with a large diameter reaming head. However, ground conditions need to be favorable to allow the use of raise bore method. The circular smooth walls characteristic of bored raises tend, in many cases, to make them self-supporting. Although, during reaming operation over-break could be occurred and lead to instability of shaft. In addition, there may be some concern about wedge type block failures from the excavation walls. Due to these concerns the stability of raise bored shaft should be analyzed to minimize the risk of using this method. This study aim to investigate the stability of raise bored shaft which recently was finished in Balya PB-ZN underground mine. The ventilation shaft was excavated between the 1200 and 1000m levels. The depth and diameter of the shaft are 200m and 2.44 m, respectively. In addition, in this paper, the simple numerical modeling will be presented due to analyze the stability of excavated shaft.

Orijinal dilİngilizce
Ana bilgisayar yayını başlığıRock Mechanics and Rock Engineering
Ana bilgisayar yayını alt yazısıFrom the Past to the Future
EditörlerHasan Gerçek, Resat Ulusay, Mehmet Ali Hindistan, Ergün Tuncay, Ömer Aydan
YayınlayanCRC Press/Balkema
Sayfalar391-396
Sayfa sayısı6
ISBN (Basılı)9781138032651, 9781138032651
Yayın durumuYayınlandı - 2016
EtkinlikInternational Symposium on International Society for Rock Mechanics, ISRM 2016 - Cappadocia, Turkey
Süre: 29 Ağu 201631 Ağu 2016

Yayın serisi

AdıRock Mechanics and Rock Engineering: From the Past to the Future
Hacim1

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???event.eventtypes.event.conference???International Symposium on International Society for Rock Mechanics, ISRM 2016
Ülke/BölgeTurkey
ŞehirCappadocia
Periyot29/08/1631/08/16

Bibliyografik not

Publisher Copyright:
© 2016 Taylor & Francis Group, London.

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