水封爆破装药结构优化数值分析及其应用

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Abstract Taking the Wen Quan Tunnel as the research background, three kinds of charge structures under hydraulic blasting including the top-water-decking charge structure, two ends-water-decking charge structure and lower-water-decking charge structure were simulated from the views of stress, vibration velocity, dynamic damage and dust after explosion in order to choose the best charge structure.The results show that:（1） The lower-water-decking charge structure is liable to cause rock damage or even breakage at the orifice, resulting in the outflow of explosive gas and reduction of blasting effect.The explosion stress duration in the top-water-decking charge structure and two ends-water-decking charge structure is longer, and it is favorable for surrounding rock fragmentation.Water medium at the bottom of the two ends-water-decking charge structure can protect the surrounding rock of the hole bottom;（2） The blasting vibration speed and stress of the surrounding rock at both ends of the hole can be reduced by using the two ends-water-decking charge structure, so that the energy of the explosive can be fully acted on the surrounding rock of the hole wall to be broken, and explosive consumption can be reduced;（3） The top-water-decking charge structure has the smallest damage to the surrounding rock of the orifice, which causes the larger blocks of rock after breakage.The lower-water-decking charge structure forms the smallest damage area, which results in high explosive consumption.The damage area formed by the two ends-water-decking charge structure is regular, and the rock fragmentation is minimum after blasting;（4） Among the three charg structures, the dust concentration of the lower-water-decking charge structure is the highest after explosion.The dust concentration of the two ends-water-decking charge structure after explosion is slightly higher than that of the top-water-decking charge structure, and the difference is very small.However, the blasting effect of the two ends-water-decking charge structure is better than that of the top-water-decking charge structure.In summary, the two ends-water-decking charge structure is the best and can be used in engineering construction.

Key words： hydraulic blasting charge structure dynamic damage numerical simulation

Received: 27 September 2018 Published: 28 April 2020

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	Articles by authors
	LIU Jiangchao
	GAO Wenxue
	WANG Lintai
	CAO Xiaoli
	ZHANG Shenghui
	WEI Xiao

Cite this article:

LIU Jiangchao,GAO Wenxue,WANG Lintai, et al. Numerical analysis on the charge structure optimization under hydraulic blasting and its application[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(9): 57-62.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I9/57

[1]孙鑫,林柏泉,董涛,等.穿层深孔水压控制爆破及其在防突工程中的应用[J].采矿与安全工程学报,2010,27（1）:86-90. Sun X, Lin B Q, Dong T, et al. Deep crossing-hole controlled hydraulic blasting and its application in outburst prevention[J]. Journal of Mining & Safety Engineering, 2010, 27（1）:82-86. [2]宗琦,田立,汪海波.水介质不耦合装药爆破岩石破坏范围的研究和应用[J].爆破,2012,29（02）:42-46. Zong Q, Tian L, Wang H B. Study and Application on Rock Damage Range by Blasting with Water-decoupled Charge[J]. Blasting, 2012, 29（2）:42-46. [3]钟明寿,龙源,李兴华,邵鲁中,谢全民.基于炮孔不同耦合介质的孔壁爆炸载荷及比能时间函数分析[J].振动与冲击,2011,30（07）:116-119. Zhong M S, Long Y, Li X H, et al. Time function for borehole explosive loading and specific energy based on different coupling mediums[J]. Journal of Vibration & Shock, 2011, 30（7）:116-119. [4]王志亮,李永池.工程爆破中径向水不耦合系数效应数值仿真[J].岩土力学, 2005, 26（12）:1926-1930. Wang Z L, Yong-Chi L I. Numerical simulation on effects of radial water-decoupling coefficient in engineering blast[J]. Rock & Soil Mechanics, 2005, 26（12）:1926-1930. [5]蔡永乐,付宏伟.水压爆破应力波传播及破煤岩机理实验研究[J].煤炭学报, 2017, 42（4）:902-907. Cai Y L, Fu H W. Experimental study on hydraulic blasting stress wave propagation and coal broken mechanism[J]. Journal of China Coal Society, 2017, 42（4）:902-907. [6]吴亮,钟冬望,卢文波.空气间隔装药爆炸冲击荷载作用下混凝土损伤分析[J].岩土力学,2009,30（10）:3109-3114. Liang W U, Zhong D W, Wen-Bo L U. Study of concrete damage under blast loading of air-decking[J]. Rock & Soil Mechanics, 2009, 30（10）:3109-3114. [7]池恩安,梁开水,赵明生.孔底空气间隔装药降振试验研究[J].煤炭学报,2012,37（06）:944-950. Chi E A, Liang K S, Zhao M S. Experimental study on vibration reduction of the hole bottom air space charging[J]. Journal of China Coal Society, 2012, 37（6）:944-950（7）. [8]何广沂.节能环保工程爆破[M]. 中国铁道出版社, 2007. HE Guang-yi, Energy saving and environmental protection engineering blasting[M],CHINA RAILWAY PUBLISHING HOUSE,2007 [9]吴亮,卢文波,钟冬望,朱红兵.混凝土介质中空气间隔装药的爆破机理[J].爆炸与冲击,2010,30（01）:58-64. Wu L, Lu W B, Zhong D W, et al. Blasting mechanism of air-decked charge in concrete medium[J]. Explosion & Shock Waves, 2010, 30（1）:58-64. [10]闻磊,李夕兵,吴秋红,等.花岗斑岩Holmquist-Johnson-Cook本构模型参数研究[J]. 计算力学学报, 2016, 33（5）:725-731. WEN Lei, Li Xi-bing, WU Qiu-hong, et al. On parameters of Holmquist-Johnson-Cook model for granite porphyry[J]. Chinese Journal of Computational Mechanics, 2016, 33（5）:725-731. [11]LSTC, LS-DYNA keyword user’s manual[M]. California:Livermore Software Technology Corporation, 2003. [12]鞠杨,环小丰,宋振铎,田鹭璐,毛彦喆.损伤围岩中爆炸应力波动的数值模拟[J].爆炸与冲击,2007（02）:136-142. Yang JU, Xiao-Feng H, Song Z D, et al. Numerical analyses of blast wave stress propagation and damage evolution in rock masses[J]. Explosion & Shock Waves, 2007, 27（2）:136-142.