何家采区爆破振动波传播规律的研究

Research of the Law of Blasting Vibration Wave Propagation in Hejia Mining Area

爆破振动是爆破的三大危害之一,它能使爆区周围的工业建筑和民房受损,形成严重的爆破危害。为了研究弓长岭露天铁矿何家采区生产爆破所产生的振动波传播规律和对周边环境的影响程度,控制爆破振动负面效应,对其生产爆破在爆区与其附近的何家村之间采用定点观测的方法进行监测,获得了爆破地震波形数据,详细分析了爆破地面质点振动速度、频率和持续时间等特征参数。分析结果表明,采区生产爆破时产生的爆破地震效应较弱,因此,生产爆破所产生的爆破振动对何家采区周围的居民房屋危害不大。同时,利用最小二乘法对测得的数据进行线性回归,得出了质点振动速度经验公式,为确定矿山不同爆区生产爆破的最大同段药量和预测、控制爆破振动强度提供了参考。

Blasting vibration is one of the three major hazards of blasting.It can make industrial buildings and civil buildings around the blasting area damaged,resulting in serious blasting hazards.In order to explore the law of vibration wave propagation in production blasting in Hejia mining area of Gongchangling open-pit iron mine and the impact on the surrounding environment to control the negative effects of blasting vibration,the fixed point observation on the production blasting is made to monitor the area between the blasting areas and near the village,obtaining the blasting seismic wave data.The parameters of particle vibration velocity at blasting point,blasting frequency and duration time are analyzed in detail.The analysis results show that blasting seismic effect during the mining blasting is weak,so the blasting vibration has little harm to the residents＇ houses around Hejia mining area.The linear regression of the data is realized by using the least squares method,obtaining the particle vibration velocity empirical formula,which provides the reference for determining the maximum charge at the same interval in different blasting area,and predicting and controlling the blasting vibration intensity.