کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4921897 1429524 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new analytical solution for calculation the displacement and shear stress of fully grouted rock bolts and numerical verifications
ترجمه فارسی عنوان
یک راه حل تحلیلی جدید برای محاسبه فشار جابجایی و برش بولت های سنگی به کار رفته و بررسی های عددی
کلمات کلیدی
پیچ و مهره کاملا سنگ متصل، جابه جایی، استرس برشی،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
چکیده انگلیسی
In presence of difficult conditions in coal mining roadways, an adequate stabilization of the excavation boundary is required to ensure a safe progress of the construction. The stabilization of the roadways can be improved by fully grouted rock bolt, offering properties optimal to the purpose and versatility in use. Investigations of load transfer between the bolt and grout indicate that the bolt profile shape and spacing play an important role in improving the shear strength between the bolt and the surrounding strata. This study proposes a new analytical solution for calculation displacement and shear stress in a fully encapsulated rock bolt in jointed rocks. The main characteristics of the analytical solution consider the bolt profile and jump plane under pull test conditions. The performance of the proposed analytical solution, for three types of different bolt profile configurations, is validated by ANSYS software. The results show there is a good agreement between analytical and numerical methods. Studies indicate that the rate of displacement and shear stress from the bolt to the rock exponentially decayed. This exponential reduction in displacement and shear stress are dependent on the bolt characteristics such as: rib height, rib spacing, rib width and grout thickness, material and joint properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mining Science and Technology - Volume 26, Issue 6, November 2016, Pages 1073-1079
نویسندگان
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