本文關(guān)鍵詞： 混裝乳化炸藥 爆破參數(shù) 神經(jīng)網(wǎng)絡(luò) 數(shù)值模擬　出處：《武漢科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：現(xiàn)場混裝炸藥與常規(guī)包裝炸藥的爆破參數(shù)有著較大的差異，選取合理的爆破參數(shù)對爆破經(jīng)濟效益和爆破效果會產(chǎn)生決定性的影響。因此，對現(xiàn)場混裝乳化炸藥的爆破參數(shù)進行優(yōu)化研究，并使用數(shù)值模擬方法進行驗證分析，得出與巖石特性相適應(yīng)的最優(yōu)爆破參數(shù)，對更大規(guī)模推廣和發(fā)展現(xiàn)場混裝炸藥應(yīng)用技術(shù)具有十分重要的意義。 本文通過理論分析、數(shù)值模擬與工程實際相結(jié)合的方法，對現(xiàn)場混裝乳化炸藥爆破參數(shù)進行了優(yōu)化。取得了如下主要結(jié)論： （1）利用爆炸動力學(xué)知識，建立了現(xiàn)場混裝乳化炸藥爆破塊度的計算模型。通過理論計算，得到了多排炮孔爆破塊度組成的計算公式。 （2）結(jié)合現(xiàn)場混裝乳化炸藥爆破工程實際，，分析了影響混裝乳化炸藥爆破效果的因素，利用Matlab數(shù)學(xué)軟件自帶的神經(jīng)網(wǎng)絡(luò)模型，通過輸入現(xiàn)場試驗數(shù)據(jù)對神經(jīng)網(wǎng)絡(luò)模型進行訓(xùn)練，得到模型的計算誤差在1.5%以內(nèi)。采用訓(xùn)練后的模型，計算得到了現(xiàn)場混裝乳化炸藥爆破三種礦巖（石灰?guī)r、凝灰?guī)r、磷灰?guī)r）的最優(yōu)爆破參數(shù)，可用于指導(dǎo)現(xiàn)場爆破施工。 （3）依據(jù)BP神經(jīng)網(wǎng)絡(luò)模型優(yōu)化得到的現(xiàn)場混裝乳化炸藥的爆破參數(shù)，建立了采用混裝乳化炸藥進行巖石爆破的有限元模型。通過數(shù)值模擬分析，對自由面附近處和炮孔間巖石的破壞特征進行了研究，發(fā)現(xiàn)爆炸應(yīng)力波的疊加提高了巖石的最大主應(yīng)力均值，有助于巖石的破碎。數(shù)值模擬結(jié)果進一步驗證了優(yōu)化得到的爆破參數(shù)的可靠性，采用“寬孔距，窄排距”的梅花形布孔形式切實可行。
[Abstract]:The blasting parameters of mixed explosive on site are different from those of conventional package explosive, and the reasonable blasting parameters will have a decisive effect on the blasting economic benefit and blasting effect. The blasting parameters of mixed emulsion explosive are optimized and verified by numerical simulation method. The optimum blasting parameters suitable for rock characteristics are obtained. It is of great significance to popularize and develop the field mixed explosive application technology on a larger scale. In this paper, the blasting parameters of mixed emulsion explosive are optimized by theoretical analysis, numerical simulation and engineering practice. The main conclusions are as follows:. 1) based on the knowledge of explosion dynamics, the calculation model of blasting fragmentation of mixed emulsion explosive in the field is established, and the formula for calculating the blasting fragmentation composition of multi-row blasting holes is obtained by theoretical calculation. Combined with the blasting engineering practice of field mixed emulsion explosive, the factors influencing the blasting effect of mixed emulsion explosive are analyzed. The neural network model is trained by the input of field test data by using the neural network model brought in by Matlab mathematical software. The calculation error of the model is less than 1.5%. The optimum blasting parameters of three kinds of mineral rock (limestone, tuff and phosphorous limestone) in field mixed emulsion explosive blasting are calculated by using the trained model, which can be used to guide the field blasting construction. According to the blasting parameters of the field mixed emulsion explosive, the finite element model of rock blasting with mixed emulsion explosive is established, and the numerical simulation analysis is carried out. The failure characteristics of rock near the free surface and between the holes are studied. It is found that the superposition of the explosion stress wave increases the mean value of the maximum principal stress of the rock. The numerical simulation results further verify the reliability of the optimized blasting parameters.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD235

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