摘要
露天矿山爆破开采过程中会产生一系列的危害,严重威胁地表建筑物及人员的安全。通过现场实时监测采集了露天矿山远距离建筑物的质点振动速度及主振频率,并且根据萨道夫斯基公式对监测结果进行线性回归,推导出爆破振动波的衰减规律。试验结果表明:爆破振动质点振速与爆心距有关,随着爆心距的增大,质点振动速度逐渐减小;质点振动的三向振速中,水平径向振速最大;监测点的峰值振速均在安全允许范围之内,一般情况下对周围建筑物没有影响;爆破地震波衰减系数K=248.05,α=1.52,即爆破振动质点振速衰减规律公式为:V=248.05(3√Q/R)^(1.52)。爆破振动监测结果和衰减规律对类似地形和地质的露天矿爆破开采具有一定的参考价值。
A series of hazards will be generated during the blasting and mining of open-pit mines,which seriously threaten the safety of surface buildings and personnel.Through on-site real-time monitoring,the particle vibration velocity and main vibration frequency of the long-distance building in the open-pit mine are collected,and the monitoring results are linearly regressed according to the Sodev’s regression formula to deduce the attenuation law of blasting vibration waves.The particle vibration velocity of blasting vibration is related to the blast center distance.As the blast center distance increases,the particle vibration speed gradually decreases;among the three-directional vibration velocity of the particle vibration,the horizontal radial vibration velocity is the largest;The peak vibration velocity of the monitoring point is within the safe allowable range,and generally has no influence on the surrounding buildings;the attenuation coefficient of blasting seismic wave is K=248.05,α=1.52,that is,the formula for attenuation law of blasting vibration particle vibration velocity is:V=248.05(3√Q/R)^(1.52).The blasting vibration monitoring results and attenuation laws have certain reference value for blasting mining in open-pit mines with similar terrain and geological conditions.
作者
邢恩达
曹丽
卢斌强
Xing Enda;Cao Li;Lu Binqiang(Zhejiang Design Institute of Water Conservancy&Hydro-Electric Power,Hangzhou 310023,China;Civil Engineering College,Shaoxing University,Zhejiang Shaoxing 312000,China;Zhejiang Key Lab of Rock Mechanics and Geohazards of Shaoxing University,Zhejiang Shaoxing 312000,China)
出处
《科技通报》
2021年第9期90-93,117,共5页
Bulletin of Science and Technology
基金
浙江省水利科技计划项目(RC1841)
浙江省基础公益研究计划项目(LGF19E090012)
关键词
爆破振动
周围建筑物
振动监测
爆破衰减规律
blasting vibration
surrounding buildings
vibration monitoring
blasting attenuation law
作者简介
邢恩达(1979-),男,汉,浙江金华,硕士研究生。从事岩土工程应用研究,E-mail:17806411@qq.com。
