Title of Paper:锦屏二级水电站施工排水洞岩爆数值模拟

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Date of Publication:2022-10-09

Journal:山东大学学报 工学版

Volume:39

Issue:4

Page Number:134-139

ISSN No.:1672-3961

Abstract:Rock-burstis a very complicated dynamical instability phenomenon.High
   ground stress and its induced frequent rockbursts are major influences
   of tunnel instability during the survey and design and construction
   stages.As an important and casual construction of the Jinping Second
   Level Hydropower Station on the Yalongjiang River,Sichuan Province,when
   the drain tunnel was excavated at the depth of 1 600 m,there frequently
   occurred plenty of rock-birsts,which restricted the development of
   construction.Aiming to investigate the relationship between the
   mock-burst mechanism and high ground stress,and to effectively predict
   the location of rock-bursts in the drain tunnel,a progressive failure
   progress numerical analysis code-RFPA was used to analyze the stress,and
   the fitting curves of the initial stress were obtained corresponding to
   the site measurement.Meanwhile,on the basis of RFPA simulation,the
   disturbed zones in the surrounding rock mass induced by stress
   redistribution resulting from excavation agreed with the mock-burst
   fields,which indicated that RFPA can virtually simulate the mechanism of
   rock-burst.

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