發(fā)布時(shí)間：2018-07-31 19:42

【摘要】：隨著爆破技術(shù)在工程中的廣泛應(yīng)用，微差爆破作為一種有效的爆破減振技術(shù)，得到人們的很大關(guān)注。同時(shí),數(shù)碼雷管的規(guī)�；�生產(chǎn)，也為精確微差爆破的實(shí)現(xiàn)提供了物質(zhì)基礎(chǔ),因此，研究臨近邊坡爆破最優(yōu)微差時(shí)間，對(duì)保護(hù)邊坡穩(wěn)定、維持基建工程安全運(yùn)行有十分重要的意義。 本文針對(duì)不同方法選取的最優(yōu)微差時(shí)間差距較大的問(wèn)題，以國(guó)家自然科學(xué)基金項(xiàng)目（51174147）為背景，基于室內(nèi)混凝土邊坡實(shí)驗(yàn)，首先利用小波包分析技術(shù)對(duì)不同微差時(shí)間下的爆破振動(dòng)信號(hào)進(jìn)行小波包能量譜研究，獲得了振動(dòng)信號(hào)在不同頻帶上的能量分布圖，得出該實(shí)驗(yàn)背景下的最優(yōu)微差時(shí)間。然后，對(duì)爆破振動(dòng)速度信號(hào)進(jìn)行微分、去噪處理，采用Fourier變換方法求得信號(hào)的加速度和標(biāo)準(zhǔn)加速度反應(yīng)譜；通過(guò)對(duì)比響應(yīng)加速度大小，從另一角度確定了該邊坡模型的最優(yōu)微差時(shí)間，而且二種方法所得結(jié)果基本一致。說(shuō)明運(yùn)用爆破振動(dòng)信號(hào)小波包分析和反應(yīng)譜分析綜合分析方法確定最優(yōu)微差時(shí)間是可行并符合實(shí)際的。 本文為最優(yōu)微差時(shí)間的確定提供了一種新的分析方法；此外，論文還結(jié)合邊坡模態(tài)分析，得出邊坡上可能的共振區(qū)域，對(duì)臨近邊坡爆破工程具有一定的指導(dǎo)意義。
[Abstract]:With the wide application of blasting technology in engineering, millisecond blasting, as an effective blasting vibration reduction technology, has received great attention. At the same time, the large-scale production of digital detonators also provides a material basis for the realization of precise millisecond blasting. Therefore, the study of the optimal millisecond time of near slope blasting is beneficial to the protection of slope stability. It is of great significance to maintain the safe operation of capital construction projects. In this paper, aiming at the problem that the difference of optimal differential time between different methods is large, taking the project of National Natural Science Foundation (51174147) as the background, based on the indoor concrete slope experiment, Firstly, wavelet packet analysis technique is used to study the wavelet packet energy spectrum of the blasting vibration signal under different millisecond difference time. The energy distribution diagram of the vibration signal in different frequency bands is obtained, and the optimal differential time under the experimental background is obtained. Then, the velocity signal of blasting vibration is treated by differential and de-noising, and the acceleration and standard acceleration response spectrum of the signal are obtained by Fourier transform, and the magnitude of response acceleration is compared. From another point of view, the optimal differential time of the slope model is determined, and the results obtained by the two methods are basically consistent. It is shown that it is feasible and practical to determine the optimal differential time by using the wavelet packet analysis of blasting vibration signal and the comprehensive analysis method of response spectrum analysis. This paper provides a new analysis method for the determination of optimal differential time, in addition, combining with the slope modal analysis, the possible resonance region on the slope is obtained, which has certain guiding significance for the blasting engineering near the slope.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU751.9;TB41

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 文潮;王占江;李運(yùn)良;門(mén)朝舉;陳立強(qiáng);;預(yù)制溝槽對(duì)爆破震動(dòng)阻隔效應(yīng)的實(shí)驗(yàn)研究[J];地下空間與工程學(xué)報(bào);2012年02期

2 徐全軍,張慶明,惲壽榕;爆破地震峰值的神經(jīng)網(wǎng)絡(luò)預(yù)報(bào)模型[J];北京理工大學(xué)學(xué)報(bào);1998年04期

3 朱傳統(tǒng);劉宏根;梅錦煜;;地震波參數(shù)沿邊坡坡面?zhèn)鞑ヒ?guī)律公式的選擇[J];爆破;1988年02期

4 吳騰芳,王凱;微差爆破技術(shù)研究現(xiàn)狀[J];爆破;1997年01期

5 彭樂(lè)平;露天礦高臺(tái)階深孔爆破施工改進(jìn)實(shí)例[J];爆破;2001年01期

6 甄育才,朱傳云;中遠(yuǎn)區(qū)微差爆破振動(dòng)疊加效應(yīng)影響因素分析[J];爆破;2005年02期

7 郭學(xué)彬;張繼春;劉泉;蒲傳金;;微差爆破的波形疊加作用分析[J];爆破;2006年02期

8 王在泉，，陸文興;高邊坡爆破開(kāi)挖震動(dòng)傳播規(guī)律及質(zhì)量控制[J];爆破;1994年03期

9 李啟發(fā);爆破地震波對(duì)巖質(zhì)邊坡穩(wěn)定性的影響[J];爆破;1995年03期

10 宋光明,曾新吾,陳壽如,吳從師;基于波形預(yù)測(cè)小波包分析模型的降振微差時(shí)間選擇[J];爆炸與沖擊;2003年02期

相關(guān)博士學(xué)位論文 前1條

1 李洪濤;基于能量原理的爆破地震效應(yīng)研究[D];武漢大學(xué);2007年

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