本文關(guān)鍵詞： 臺階爆破 異位孔 裝藥量 數(shù)值模擬 爆炸應(yīng)力場　出處：《遼寧工程技術(shù)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：在露天礦穿爆作業(yè)過程中,由于穿孔作業(yè)面比較復(fù)雜導(dǎo)致穿孔作業(yè)不規(guī)律,進而導(dǎo)致后續(xù)爆破作業(yè)效果不理想。這種情況是露天礦穿爆作業(yè)過程中經(jīng)常出現(xiàn)的狀況,嚴重影響著露天礦生產(chǎn)效率和經(jīng)濟效益,因此很有必要對異位孔爆破進行深入研究。針對露天礦穿爆作業(yè)過程中經(jīng)常出現(xiàn)異位孔現(xiàn)象,首次提出了異位孔的概念,分析了產(chǎn)生異位孔的原因,運用理論分析、數(shù)值模擬和數(shù)學(xué)擬合相結(jié)合的方法,對露天礦異位孔爆破進行了深入的研究。通過巖石破碎機理以及爆炸應(yīng)力波理論分析了炸藥爆炸后在巖體內(nèi)的爆破應(yīng)力場有效應(yīng)力分布狀態(tài)。借助于有限元軟件ANSYS/LS-DYNA對三排,5個孔進行數(shù)值模擬,得到了各炮孔爆炸應(yīng)力場相互作用的有效應(yīng)力分布狀態(tài)和巖石最不易破碎點的抗拉強度2.5MPa。在已建立的設(shè)計孔模型基礎(chǔ)上,模擬中間孔發(fā)生異位0°、22.5°、45°偏移20cm、60cm、100cm、140cm、180cm時與周邊孔爆炸后的有效應(yīng)力分布狀態(tài)。利用最小二乘法線性擬合的數(shù)學(xué)方法將數(shù)值模擬結(jié)果進行擬合,得到異位孔0°、22.5°、45°偏移20-180cm時與周邊孔裝藥量的匹配關(guān)系公式。為露天礦穿爆生產(chǎn)成本控制以及工程爆破方面,具有重要的理論和指導(dǎo)意義。
[Abstract]:During the blasting operation of opencast mine, the perforation operation is irregular due to the complexity of the perforation operation surface, and the result of subsequent blasting operation is not ideal, which is a situation that often occurs in the process of opencast mine blasting operation. The production efficiency and economic benefit of opencast mine are seriously affected, so it is necessary to study the ectopic hole blasting deeply. The concept of ectopic hole is put forward for the first time in allusion to the phenomenon of ectopic hole often appearing in the process of opencast mine blasting. The causes of ectopic holes are analyzed, and the method of combining theoretical analysis, numerical simulation and mathematical fitting is used. The ectopic hole blasting in opencast mine is studied in depth. The effective stress distribution of blasting stress field after explosive explosion is analyzed by means of rock breaking mechanism and explosive stress wave theory. The finite element software is used to analyze the effective stress distribution. ANSYS/LS-DYNA numerically simulates three rows and five holes, The effective stress distribution and the tensile strength of the most difficult breakage point of rock are obtained. Based on the established design hole model, the effective stress distribution state of the interaction between the blast stress fields of each hole and the tensile strength of the rock at the most difficult breakage point are obtained. The effective stress distribution of an ectopic 0 擄(22.5 擄) 45 擄offset 20 cm ~ (10) / 100 cm ~ (10) cm ~ (-1) ~ 100 cm ~ (10) cm ~ (-1) and the effective stress distribution after the explosion of a peripheral hole is simulated. The numerical simulation results are fitted by the least square linear fitting mathematical method. The formula of matching between the offset of 0 擄and 22.5 擄45 擄and the charge quantity of peripheral hole is obtained, which is of great theoretical and guiding significance for the cost control of piercing and blasting in opencast mine and the engineering blasting.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD235

【參考文獻】

相關(guān)期刊論文 前10條

1 喻曉峰;周浪;趙新濤;;影響巖體爆破質(zhì)量因素的重要度分析[J];煤炭工程;2011年12期

2 AFENI Thomas Busuyi;;Optimization of drilling and blasting operations in an open pit mine——the SOMAIR experience[J];Mining Science and Technology;2009年06期

3 江召兵;沈慶;陳徐均;潘小強;;ALE動網(wǎng)格法在流固耦合數(shù)值模擬中的應(yīng)用[J];應(yīng)用力學(xué)學(xué)報;2008年04期

4 楊吉新;張可;黨慧慧;;基于ANSYS的流固耦合動力分析方法[J];船海工程;2008年06期

5 黃中偉;楊磊;;應(yīng)力沖擊波在結(jié)構(gòu)節(jié)點的反射和透射[J];深圳大學(xué)學(xué)報(理工版);2007年01期

6 孫波勇;段衛(wèi)東;鄭峰;廖成孟;;爆破作用下巖石破碎理論模型的研究及發(fā)展趨勢[J];金屬礦山;2006年09期

7 李蘭彬;;南芬露天鐵礦臺階爆破優(yōu)化設(shè)計數(shù)學(xué)模型[J];本鋼技術(shù);2006年01期

8 鄭炳旭;爆破力學(xué)在工程中的應(yīng)用[J];華南理工大學(xué)學(xué)報(自然科學(xué)版);2003年S1期

9 段海峰,侯運炳,燕洪全,程建中,孔令彪,馮述虎;爆破機理的推墻假說研究[J];礦業(yè)研究與開發(fā);2003年01期

10 馬建軍,蔡路軍;遺傳算法在爆破優(yōu)化中的應(yīng)用[J];礦業(yè)研究與開發(fā);2001年03期

，

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