地下洞室及其围岩爆破地震安全监测与动力分析
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摘要
基于地下洞室及其围岩的爆破震动安全监测,通过质点振动速度峰值及其卓越频率分析,论述爆破地震波的传播规律以及地下洞室与围岩爆破地震作用下的动力特性,并对爆破地震安全监测与分析结果进行解释与原因探讨。通过大量监测数据的回归分析,得出质点振动速度峰值与爆破药量和距离及环境条件的关系式,并在分析三者关系的基础上指出,近爆破点区域的爆破地震波衰减速度明显大于较远区域,爆破引起的质点振动速度峰值的卓越频率集中在以45Hz为中心的15~75Hz范围值。质点振动速度峰值及其卓越频率与爆破规模与环境的几何因素密切相关,介质本身的物理几何特性是爆破地震波衰减的主要影响因素之一。
Based on blasting seismic safety monitoring and frequency and amplitude analysis of the peak particle velocity (PPV) of chamber of underground pit and its surrounding rock,the law of blasting seismic waves propagation in surrounding rock and the dynamic characteristics of chamber of underground pit and its surrounding rock are described.The results of blasting seismic safety monitoring effects of chamber of underground pit and its surrounding rock are discussed and explored. The attenuation formula of the PPV conditioned with explosives and distance between blasting center and monitoring position is shown.The relationship between the PPV and ratio charge of blasting vibration is pointed out,which shows that the PPV attenuates more rapidly in near area than in further area, and the principal frequency focuses on 15～75Hz especially 45Hz, and that correlation between the PPV and its principal frequency and charge and distance between blasting center and monitoring position is more high.The decaying of the blasting seismic waves related mainly with the neutrality and characteristics of propagation media mass.
Based on blasting seismic safety monitoring and frequency and amplitude analysis of the peak particle velocity (PPV) of chamber of underground pit and its surrounding rock,the law of blasting seismic waves propagation in surrounding rock and the dynamic characteristics of chamber of underground pit and its surrounding rock are described.The results of blasting seismic safety monitoring effects of chamber of underground pit and its surrounding rock are discussed and explored. The attenuation formula of the PPV conditioned with explosives and distance between blasting center and monitoring position is shown.The relationship between the PPV and ratio charge of blasting vibration is pointed out,which shows that the PPV attenuates more rapidly in near area than in further area, and the principal frequency focuses on 15～75Hz especially 45Hz, and that correlation between the PPV and its principal frequency and charge and distance between blasting center and monitoring position is more high.The decaying of the blasting seismic waves related mainly with the neutrality and characteristics of propagation media mass.
引文
[1]李仲奎,王爱民,李达成.某地下厂房施工过程中突发性破坏的分析及对策[J].岩土工程学报,1997,19(5):44~79
[2]张世雄,尹家国,谢达武等.地质因素与爆破等工程因素对坚硬裂隙岩体稳定性的影响[J].矿冶工程,1997,17(增1):8~11
[3]杨松林,王梦恕,张成平等.城市地铁安全施工第三方监测的研究与实施.中国安全科学学报,2004,14(10):33~76
[4]杨振茂.郑州市地下空间开发利用的岩土工程安全问题[J].中国安全科学学报,2006,16(2):12~16
[5]Birch WJ,Pegden M.Improved Prediction of Ground Vibrations From Blasting at Quarries[J].Transactions of the Institution of Mining and Metallurgy(Section A):Mining Industry.2000,109:102~106
[6]Liu,Yong;Qiao,Chunsheng;Song,Yuxi-ang;Zhu,Yongquan.Simulation and Moni-toring of Middle Pilot Safety of linked-arch Tunnel under Blasting[A].Progress in Safety Science and Technology Volume4:Proceed-ings of the2004International Symposiumon Safety Science and Technology[C],Oct25-282004:622~626
[2]张世雄,尹家国,谢达武等.地质因素与爆破等工程因素对坚硬裂隙岩体稳定性的影响[J].矿冶工程,1997,17(增1):8~11
[3]杨松林,王梦恕,张成平等.城市地铁安全施工第三方监测的研究与实施.中国安全科学学报,2004,14(10):33~76
[4]杨振茂.郑州市地下空间开发利用的岩土工程安全问题[J].中国安全科学学报,2006,16(2):12~16
[5]Birch WJ,Pegden M.Improved Prediction of Ground Vibrations From Blasting at Quarries[J].Transactions of the Institution of Mining and Metallurgy(Section A):Mining Industry.2000,109:102~106
[6]Liu,Yong;Qiao,Chunsheng;Song,Yuxi-ang;Zhu,Yongquan.Simulation and Moni-toring of Middle Pilot Safety of linked-arch Tunnel under Blasting[A].Progress in Safety Science and Technology Volume4:Proceed-ings of the2004International Symposiumon Safety Science and Technology[C],Oct25-282004:622~626
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