|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|4929191||1363282||2018||8 صفحه PDF||ندارد||دانلود کنید|
A series of rock cutting tests was conducted with three different metamorphic rock types. Samples were prepared with alpha angles of 0Â°, 45Â° and 90Â° to investigate the influence of foliation angle on the rolling forces (FR,scaled) of a mini disc cutter (scale 1:8). Results show that FR,scaled increased by a factor of about 2 at an alpha angle of 0Â° compared to 90Â° for all three rock types. In a subsequent step, a way to implement the results into a TBM performance prediction model to derive a correction factor for angular dependence of TBM performance was shown. The resulting correction factor for overall TBM performance (FN0Â°/FN90Â°) is in the range of 1.33â1.80 which is in good agreement with previously published TBM field data by BÃ¼chi (1984) and Thuro (2002).
Journal: Tunnelling and Underground Space Technology - Volume 71, January 2018, Pages 215-222