小湾水电站岩石高边坡爆破振动速度安全阈值研究
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摘要
在国内外有关岩石边坡爆破振动速度安全阈值研究成果的基础上,通过小湾水电站岩石高边坡爆破振动荷载下动力响应计算,由各阶边坡马道上的峰值动拉应力与质点峰值振动速度间的统计关系,按照极限拉应力准则,确定小湾水电站岩石高边坡爆破振动控制的合理部位及安全阈值。研究结果表明,岩石高边坡爆破振动控制的合理部位为开挖区上一台阶马道的内侧,其振动速度控制标准为10cm/s。
Based on the domestic and foreign research achievements about the safety threshold of blasting vibration velocity,the dynamic responds of high rock slope of Xiaowan Hydropower Station under blasting vibration,are carried out;then due to the statistical relation between the peak value of tensile stress and peak particle velocity at the slope step,and according to the rule of limit tensile stress,the reasonable monitoring position and the safety threshold of rock slope during its excavation were made certain.The results of the detailed research indicate that the reasonable monitoring position for blasting vibration control is at the inside of the slope step;and the peak particle velocity safety threshold is 10 cm/s for rock slope excavation.
Based on the domestic and foreign research achievements about the safety threshold of blasting vibration velocity,the dynamic responds of high rock slope of Xiaowan Hydropower Station under blasting vibration,are carried out;then due to the statistical relation between the peak value of tensile stress and peak particle velocity at the slope step,and according to the rule of limit tensile stress,the reasonable monitoring position and the safety threshold of rock slope during its excavation were made certain.The results of the detailed research indicate that the reasonable monitoring position for blasting vibration control is at the inside of the slope step;and the peak particle velocity safety threshold is 10 cm/s for rock slope excavation.
引文
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[4]李俊如,李海波,高建光,等.黄麦岭采场边坡爆破振动响应研究[J].岩石力学与工程学报,2004,23(17):2 954-2 958.(LI Junru,LI Haibo,GAO Jianguang,et al.Response of Huangmailing rock slope to explosion[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(17):2 954-2 958.(in Chinese))
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[6]BAUER A,CALDER P N.Open pit and blast seminar[R].Kingston,Ontario,Canada:Mining Engineering Department,Queens University,1978.
[7]MOJITABAI N,BEATTI S G.Empirical approach to prediction of damage in bench blasting[J].Trans.Inst.Min.and Metall.Sect.,1996,105:75-80.
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[9]HOLMBERG R,PERSSON P A.The Swedish approach to contour blasting[C]//Proceedings of the 4th Conference on Explosive and Blasting Technique.[S.l.]:[s.n.],1978:113-127.
[10]卢文波,HUSTRULID W.临近岩石边坡开挖轮廓面的爆破设计方法[J].岩石力学与工程学报,2003,22(12):2 052-2 056.(LU Wenbo,HUSTRULID W.Design approach for excavation blasting near contour of rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(12):2 052-2 056.(in Chinese))
[11]沈蓉.小湾水电站岩石物理力学特性研究[J].云南水力发电,1977,13(4):27-29.(SHEN Rong.Rock physico-mechanical property study for Xiaowan Hydropower Station[J].Yunnan Water Power,1997,13(4):27-29.(in Chinese))
[2]黎剑华,张龙,颜荣贵.爆破地震波作川卜的边坡失稳机制一与临界振动速度[J].矿冶,2001,10(1):11-15.(LI Jianhua,ZHANG Long,YAN Ronggui.Mechanism of rock slope unstability and critical vibration velocity under action of blasting seism wave[J].Mining and Metallurgy,2001,10(1):11-15.(in Chinese)))
[3]曹孝君,吴青山,张继春,等.顺层岩质边坡的爆破振动控制标准试验研究[J].岩石力学与工程学报,2003,22(11):1 924-1 928.(CAO Xiaojun,WU Qingshan,ZHANG Jichun,et al.Testing study on control standard of vibration for layered rock slope blasting[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1 924-1 928.(in Chinese))
[4]李俊如,李海波,高建光,等.黄麦岭采场边坡爆破振动响应研究[J].岩石力学与工程学报,2004,23(17):2 954-2 958.(LI Junru,LI Haibo,GAO Jianguang,et al.Response of Huangmailing rock slope to explosion[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(17):2 954-2 958.(in Chinese))
[5]刘亚群,李海波,赵坚,等.确定岩质边坡安全阈值的新方法[J].爆炸与冲击,2004,24(5):448-452.(LIU Yaqun,LI Haibo,ZHAO Jian,et al.A new method to determine the safety threshold velocity of slope[J].Explosion and Shock Waves,2004,24(5):448-452.(in Chinese))
[6]BAUER A,CALDER P N.Open pit and blast seminar[R].Kingston,Ontario,Canada:Mining Engineering Department,Queens University,1978.
[7]MOJITABAI N,BEATTI S G.Empirical approach to prediction of damage in bench blasting[J].Trans.Inst.Min.and Metall.Sect.,1996,105:75-80.
[8]SAVELY J P.Designing a final blast to improve stability[C]//Presented at the SME Annual Meeting.New Orleans,Louisiana,U.S.A:[s.n.],1986:86-89.
[9]HOLMBERG R,PERSSON P A.The Swedish approach to contour blasting[C]//Proceedings of the 4th Conference on Explosive and Blasting Technique.[S.l.]:[s.n.],1978:113-127.
[10]卢文波,HUSTRULID W.临近岩石边坡开挖轮廓面的爆破设计方法[J].岩石力学与工程学报,2003,22(12):2 052-2 056.(LU Wenbo,HUSTRULID W.Design approach for excavation blasting near contour of rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(12):2 052-2 056.(in Chinese))
[11]沈蓉.小湾水电站岩石物理力学特性研究[J].云南水力发电,1977,13(4):27-29.(SHEN Rong.Rock physico-mechanical property study for Xiaowan Hydropower Station[J].Yunnan Water Power,1997,13(4):27-29.(in Chinese))
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