本文選題：即時(shí)型巖爆　切入點(diǎn)：水電站　出處：《巖土工程學(xué)報(bào)》2017年12期 　論文類型：期刊論文

【摘要】：根據(jù)即時(shí)型巖爆孕育及發(fā)生過程中微震信息的自相似性,提出了一種震源體積的分形計(jì)算方法。運(yùn)用上述方法,基于錦屏二級(jí)水電站施工排水洞及4條引水隧洞施工過程中的大量不同類型、等級(jí)的即時(shí)型巖爆案例,展開微震事件震源體積分布的分形行為研究。研究結(jié)果表明:即時(shí)型巖爆孕育及發(fā)生過程中的微震信息震源體積分布是具有分形結(jié)構(gòu)的;即時(shí)性應(yīng)變型巖爆體積分形維數(shù)大于0.7,即時(shí)性應(yīng)變 結(jié)構(gòu)面滑移型巖爆體積分形維數(shù)小于0.6,這意味著根據(jù)微震事件體積分形維數(shù)可以對(duì)即時(shí)性巖爆的類型進(jìn)行區(qū)分;對(duì)于即時(shí)型巖爆來說,巖爆等級(jí)越強(qiáng)則微震體積分形維數(shù)值越大;對(duì)于即時(shí)性應(yīng)變 結(jié)構(gòu)面滑移型巖爆,結(jié)構(gòu)面數(shù)越多則震源體積分形維數(shù)值越小。上述研究結(jié)果可以為高地應(yīng)力條件下不同類型巖爆的預(yù)測(cè)與防治提供合理的科學(xué)依據(jù)。
[Abstract]:According to the self-similarity of microseismic information during the preparation and occurrence of instant rockburst, a fractal calculation method of source volume is proposed. Based on a large number of real time rockburst cases of different types and grades in the construction of drainage tunnels and four diversion tunnels in Jinping II Hydropower Station, The fractal behavior of focal volume distribution of microseismic events is studied. The results show that the volume distribution of microseismic source information during the preparation and occurrence of instant rockburst has fractal structure. The integral dimension of instant strain rockburst is greater than 0.7 and the integral dimension of instant strain plane slip rockburst is less than 0.6, which means that the type of instant rockburst can be distinguished according to the fractal dimension of microseismic event volume. For instant rockburst, the stronger the grade of rockburst is, the larger the fractal dimension of microseismic volume is, and for the sliding rockburst of instant strain structure plane, The larger the number of structural planes, the smaller the fractal dimension of focal volume. The above results can provide a reasonable scientific basis for prediction and prevention of different types of rockburst under high ground stress.
【作者單位】： 華東交通大學(xué)江西省巖土工程基礎(chǔ)設(shè)施安全與控制重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院武漢巖土力學(xué)研究所巖土力學(xué)與工程國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(51509092) 江西省自然科學(xué)基金項(xiàng)目(20161BAB216141,2016BAB206159) 江西省教育廳科研項(xiàng)目(150518) 巖土力學(xué)與工程國家重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目(Z015004)
【分類號(hào)】：TV554

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1 黃志平;深埋隧洞開挖卸荷巖爆孕育過程及微震預(yù)警分析[D];東北大學(xué);2015年

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