發(fā)布時(shí)間：2018-07-01 20:03

  本文選題：臺(tái)階地形 + 爆破地震波�。� 參考：《華北理工大學(xué)》2015年碩士論文

【摘要】：傳統(tǒng)的地震波傳播理論多數(shù)是在平整地形條件下提出的,這些理論對(duì)于復(fù)雜地形存在著很大的誤差,相關(guān)的經(jīng)驗(yàn)公式也具有很大的局限性。因此,研究地形對(duì)爆破地震波傳播的影響對(duì)探索地震波衰減規(guī)律,預(yù)測(cè)和控制爆破地震效應(yīng)具有重要的現(xiàn)實(shí)意義和研究?jī)r(jià)值。結(jié)合臺(tái)階地形爆破地震波現(xiàn)場(chǎng)觀測(cè)實(shí)驗(yàn),通過(guò)對(duì)觀測(cè)數(shù)據(jù)的分析,研究爆破地震波沿臺(tái)階地形傳播的特點(diǎn)和規(guī)律。建立單一巖質(zhì)的臺(tái)階模型,以臺(tái)階坡底和坡頂處質(zhì)點(diǎn)峰值振速為指標(biāo),研究單臺(tái)階和多臺(tái)階地形質(zhì)點(diǎn)振動(dòng)速度隨高程變化及衰減規(guī)律,總結(jié)出臺(tái)階地形條件下爆破地震波的傳播特性。通過(guò)現(xiàn)場(chǎng)觀測(cè)及數(shù)據(jù)分析得到:臺(tái)階地形對(duì)爆破地震波有明顯的放大作用,現(xiàn)場(chǎng)實(shí)驗(yàn)中,放大系數(shù)在1.15~1.41之間。當(dāng)巖體結(jié)構(gòu)和節(jié)理裂隙發(fā)育相同,放大系數(shù)隨高差的增加而變大;當(dāng)爆源距增加到一定值時(shí),高程對(duì)振速的影響程度隨著距離的增大而降低,即在爆炸近區(qū),爆源距和高差共同作用于振速,而在爆炸遠(yuǎn)區(qū),高差的影響逐漸減小,振動(dòng)強(qiáng)度主要受爆源距的控制。根據(jù)巖石力學(xué)性質(zhì)和爆破參數(shù),模擬得到了質(zhì)點(diǎn)振動(dòng)速度的傳播特征,分析結(jié)果表明:在平整地形條件下爆破地震波的衰減規(guī)律可用薩道夫斯基經(jīng)驗(yàn)公式描述;臺(tái)階地形對(duì)爆破振動(dòng)速度的放大作用隨高差的增加呈現(xiàn)先增加后減小的規(guī)律;爆源的初始能量對(duì)放大系數(shù)有較大的影響;爆破地震波的強(qiáng)度受爆源距和高差的共同影響,通過(guò)對(duì)正負(fù)高差臺(tái)階地形條件下爆破地震波衰減規(guī)律的研究,最終提出了考慮高差在內(nèi)的振動(dòng)速度預(yù)測(cè)模型。
[Abstract]:Most of the traditional theories of seismic wave propagation are put forward under the condition of leveling terrain. These theories have great errors for complex terrain and the related empirical formulas have great limitations. Therefore, the study of the influence of topography on the propagation of blasting seismic waves has important practical significance and research value in exploring the attenuation law of seismic waves and in predicting and controlling the blasting seismic effects. Based on the field observation experiment of bench topographic blasting seismic wave, the characteristics and rules of blasting seismic wave propagation along the bench topography are studied by analyzing the observation data. A step model of single rock mass is established. The variation and attenuation of the vibration velocity of single and multi-step topographic particles with elevation are studied by taking the peak vibration velocity of particle at the bottom and top of the slope as the index. The propagation characteristics of blasting seismic wave under the condition of bench topography are summarized. Through field observation and data analysis, it is concluded that the terrace topography has obvious magnification effect on blasting seismic wave, and the magnification factor is between 1.15 and 1.41 in the field experiment. When the rock mass structure and joint fracture are the same, the magnification factor increases with the increase of height difference, and when the distance of explosion source increases to a certain value, the influence of height on vibration velocity decreases with the increase of distance, that is, in the near area of explosion, The vibration velocity is affected by the distance between the detonation source and the height, but in the far area of the explosion, the influence of the height difference decreases gradually, and the vibration intensity is mainly controlled by the distance between the detonation sources. According to the mechanical properties of rock and blasting parameters, the propagation characteristics of particle vibration velocity are simulated. The results show that the attenuation law of blasting seismic wave under flat terrain can be described by Sadolski's empirical formula. With the increase of height difference, the magnification effect of step topography on blasting vibration velocity shows the law of first increasing and then decreasing, the initial energy of blasting source has great influence on the magnification factor, the intensity of blasting seismic wave is affected by the distance between blasting source and height difference, By studying the attenuation law of blasting seismic wave under the topographic condition of positive and negative height difference, the prediction model of vibration velocity considering height difference is put forward.
【學(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD235

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 唐海;李海波;周青春;夏祥;劉博;李俊如;;預(yù)裂爆破震動(dòng)效應(yīng)試驗(yàn)研究[J];巖石力學(xué)與工程學(xué)報(bào);2010年11期

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本文編號(hào)：2089001