井下大直径深孔爆破震动影响分析及对策
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摘要
井下大爆破作业,势必引起周边岩体大的震动,同时波及爆区周边地表和地下构筑物、井下工程等设施。为确定井下采场大爆破的规模,预测和掌握爆破震动的影响范围和破坏程度,对井下大直径深孔爆破不同爆破规模、同段起爆药量的爆破震动速度等参数进行理论计算预测,同时开展现场爆破监测试验,通过对预测及试验结果进行讨论分析得出V合=84.7162(Q1/3/R)1.44964,并提出相应安全保障措施,为井下大直径深孔爆破崩矿作业的科学性及安全稳定性提供了必要的技术支撑。
Underground bulk blasting is bound to cause vibration of the circumjacent rock mass,and simultaneously affects surrounding surface and underground structures as well as underground engineering.In order to determined the scale of underground bulk blasting,predict and know the effecting area and destructive power of vibration caused by underground large-diameter long-hole blasting,theoretical calculation of some parameters such as blasting vibration velocity and so on for different blasting scales and different charges of one section was made,site blasting and monitoring experiments were carried out.Based on the discussion and analysis of the predicted and measured results,a formula for the attenuation of blasting vibration resultant velocity(V合=84.7162(Q1/3/R)1.44964) was presented,and some appropriate safety measures were brought forward.The study provided necessary technical support for the scientific and safe mining by large-diameter long-hole blasting.
Underground bulk blasting is bound to cause vibration of the circumjacent rock mass,and simultaneously affects surrounding surface and underground structures as well as underground engineering.In order to determined the scale of underground bulk blasting,predict and know the effecting area and destructive power of vibration caused by underground large-diameter long-hole blasting,theoretical calculation of some parameters such as blasting vibration velocity and so on for different blasting scales and different charges of one section was made,site blasting and monitoring experiments were carried out.Based on the discussion and analysis of the predicted and measured results,a formula for the attenuation of blasting vibration resultant velocity(V合=84.7162(Q1/3/R)1.44964) was presented,and some appropriate safety measures were brought forward.The study provided necessary technical support for the scientific and safe mining by large-diameter long-hole blasting.
引文
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[2]吴斌,张义平.高差条件下爆破震动峰值速度的预测研究[J].矿业研究与开发,2010,30(5):88-90.
[3]汪令辉,孙浩,黄凯程.冬瓜山铜矿深孔爆破振动衰减规律分析[J].采矿技术,2010,10(2):84-85.
[4]中南大学资源与安全工程学院.云锡卡房新山矿段采矿设计论证报告[R].长沙:中南大学,2009.
[5]中南大学资源与安全工程学院.云锡公司卡房新山矿段大孔径深孔爆破漏斗[R].长沙:中南大学,2009.
[6]刘殿中,杨仕春.工程爆破实用手册[M].北京:冶金工业出版社,2003.
[7]王玉杰,梁开水.爆破工程[M].武汉:武汉理工大学出版社,2007.
[8]廖大学,史秀志,刘金明.井下爆破振动的衰减规律研究[J].采矿技术,2007,7(2):92-93.
[9]李夕兵,凌同华,张义平.爆破震动信号分析理论与技术[M].北京:科学出版社,2009.
[10]宗琦,汪海波,周胜兵.爆破地震效应的检测和控制研究[J].岩石力学与工程学报,2008,27(5):938-944.
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