偏心不耦合装药爆破裂纹扩展实验研究
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摘要
为了研究偏心不耦合装药结构下爆炸裂纹扩展规律,以有机玻璃板为介质,采用不同装药不耦合系数(分别为1.00、1.29、1.57、1.71、1.86、2.00、2.28)的装药结构进行爆炸实验。实验表明:偏心不耦合装药时炸药爆炸在炮孔周围形成的微裂纹区半径是不均匀的;随着装药不耦合系数的增大,耦合侧和不耦合侧的微裂纹区半径差值是逐渐增大的。在不耦合系数为1.71时,耦合侧最长主裂纹长度、主裂纹总长度、主裂纹平均长度达到最大;同时耦合侧与不耦合侧最长主裂纹长度差值、主裂纹总长度差值及主裂纹平均长度差值也达到最大。该研究为改进和优化偏心不耦合装药结构、降低爆破对围岩损伤破坏具有一定的参考价值。
In order to investigate blasting crack propagation behavior under eccentric decouple charge,the organic glass was used to as model in the explosive experiment under different decoupling charge coefficients conditions( 1,1. 29,1. 57,1. 71,1. 86,2,2. 28). Results show that the micro crack area radius of eccentric decouple charge blasting in blasthole formed when the surrounding was uneven; with the increase of decoupling charge coefficient,the micro crack zone radius difference in the coupling side and the non-coupling side was gradually enlarged. When decoupling charge coefficient was 1. 71,the length of the longest side,the total length and the average length of the main crack side of coupling side reached the maximum; at the same time,the length difference of the longest side,the total length difference and the average length difference of the main crack in the coupling side and the non-coupling side reached the maximum together. The results improved and optimized the eccentric coupling charging structure and reduced rock damage.
In order to investigate blasting crack propagation behavior under eccentric decouple charge,the organic glass was used to as model in the explosive experiment under different decoupling charge coefficients conditions( 1,1. 29,1. 57,1. 71,1. 86,2,2. 28). Results show that the micro crack area radius of eccentric decouple charge blasting in blasthole formed when the surrounding was uneven; with the increase of decoupling charge coefficient,the micro crack zone radius difference in the coupling side and the non-coupling side was gradually enlarged. When decoupling charge coefficient was 1. 71,the length of the longest side,the total length and the average length of the main crack side of coupling side reached the maximum; at the same time,the length difference of the longest side,the total length difference and the average length difference of the main crack in the coupling side and the non-coupling side reached the maximum together. The results improved and optimized the eccentric coupling charging structure and reduced rock damage.
引文
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[9]徐颖,孟益平,程玉生.装药不耦合系数对爆破裂纹控制的试验研究[J].岩石力学与工程学报,2002,21(12):1843-1847.XU Ying,MENG Yi-Ping,CHENG Yu-sheng.Study on control of blast crack by decoupling charge index[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(12):1843-1847.(in Chinese)
[2]魏有志.炮孔爆破中新的岩体断裂理论[J].江西冶金学院学报,1986,7(2):63-75.WEI You-zhi.A new theory about the effect of unsymmetrical explosive loading in a borehole on rock fracture[J].Journal of Jiang Xi Institute of Metallurgy.1986,7(2):63-75.(in Chinese)
[3]王胜.光面爆破参数的计算原理[J].有色金属(矿山),1996(1):26-31.WANG Sheng.Smooth blasting parameters calculation principle[J].Nonferrous Metals(Mine Section),1996(1):26-31.(in Chinese)
[4]张建华.偏心不耦合装药爆炸应力场研究及应用[J].工业安全与环保,2001,27(8):20-23.ZHANG Jian-hua.Stress-field research and application of eccentric decouple charge[J].Industrial Safety and Environmental Protection.2001,27(8):20-23.(in Chinese)
[5]史瑾瑾,张志呈,肖正学,等.偏心不耦合装药爆破对岩石损伤的试验研究[J].露天采矿技术,2006(1):32-35.SHI Jin-jin.ZHANG Zhi-cheng,XIAO Zheng-xue,et al.Testing study of rock damage under eccentric decouple charge blasting[J].Opencast Mining Technology,2006(1):32-35.(in Chinese)
[6]ROSSMANITH H P,DAEHNKEA,KNASMILLNER R E K,et al.Fracture mechanics applications to drilling and blasting[J].Fatigue and Fracture Engineering Materials and Structures,1997,20(11):1617-1636.
[7]张志呈,史瑾瑾,蒲传金,等.偏心不耦合装药对岩石损伤的试验研究[J].爆破,2006,23(4):4-8.ZHANG Zhi-cheng,SHI Jin-jin,PU Chuan-jin,et al.Experinental research of rock damage by eccentric decouple charge blasting[J].Blasting,2006,23(4):4-8.(in Chinese)
[8]蒲传金,张志呈,郭学彬,等.改进光面爆破边坡开挖试验研究[J].化工矿物与加工,2005(1):12-15.PU Chuan-jin,ZHANG Zhi-cheng,GUO Xue-bin,et al.Researches on slope excavation testing of improved smooth blasting[J].Industrial Minerals&Processing,2005(1):12-15.(in Chinese)
[9]徐颖,孟益平,程玉生.装药不耦合系数对爆破裂纹控制的试验研究[J].岩石力学与工程学报,2002,21(12):1843-1847.XU Ying,MENG Yi-Ping,CHENG Yu-sheng.Study on control of blast crack by decoupling charge index[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(12):1843-1847.(in Chinese)