کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
311724 534125 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanism of evolution of stress–structure controlled collapse of surrounding rock in caverns: A case study from the Baihetan hydropower station in China
ترجمه فارسی عنوان
مکانیسم تکامل ساختار تنش زدایی سقوط سنگ اطراف در غارها: مطالعه موردی از نیروگاه برق آبی بیدستان در چین
کلمات کلیدی
مکانیک راک فروپاشی کنترل ساختار استرس، نظارت بر میکروزیسم، مکانیسم تکامل سقوط، ایستگاه برق آبی بیدین
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• Spatiotemporal features of stress–structure controlled collapse are presented.
• A typical collapse is investigated by field survey, SEM and MS monitoring.
• Rock mass fracturing events are mostly tensile during this kind of collapse.
• MS monitoring can play an important role for the warning of this kind of collapse.

During the excavation of the underground powerhouse in the Baihetan hydropower station, which is currently still under construction, stress–structure controlled collapse has occurred frequently. In order to study the mechanism behind the evolution of this kind of collapse, an in situ experiment involving microseismic (MS) monitoring was carried out in the left main/auxiliary powerhouse. In this paper, the spatiotemporal characteristics of stress–structure controlled collapse are summarized and presented. A field survey, scanning electron microscopy and MS monitoring have been used to investigate a typical stress–structure controlled collapse that occurred during the monitoring period. These methods provided a consistent set of results, namely, that tensile fracturing is the rock-mass fracturing mechanism that is most active during the process of evolution of stress–structure controlled collapse. In addition, the evolution of the microseismicity during the development of the studied collapse was also obtained. The results provide a direct case history that will assist the prediction and support of stress–structure controlled collapse disasters and contribute to excavation of deeply-buried caverns in the field.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tunnelling and Underground Space Technology - Volume 51, January 2016, Pages 56–67
نویسندگان
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