摘要
根据别斯库都克露天煤矿的现场情况,分析爆破地震波在多台阶边坡中的传播规律,对矿区台阶边坡进行爆破振动测试,选取爆破区域上部平台由近到远依次布置的四个振动测试点,共进行爆破振动试验7次,取得5组有效数据。通过对5组振动数据结果进行萨道夫斯基公式回归拟合分析,轴向、径向和垂直方向的振动公式拟合结果的相关性系数R均大于0.8,线性相关性较好,振动传播公式对该地质条件下的边坡震动衰减规律有较好的适用性,且随着爆心距的增大,边坡质点振动速度不断衰减,三个方向中水平径向峰值振速最大,水平切向次之,垂直方向最小,爆心距对爆破振动速度的影响要远大于高程。利用该公式开发爆破振动预测软件,通过给定的参数可实现测点位置的振动峰值预测、校核最大单段起爆药量、校核振动安全距离,为解决非工作帮的边坡稳定提供数据基础。
According to the field situation of Biesikuduke open-pit coal mine,the propagation law of blasting seismic wave in multi-step slope was analyzed.The blasting vibration tests were carried out on the step slope of the mining area.Four vibration test points were selected from near to far on the upper platform of the blasting area,and seven times blasting vibration tests were carried.Finally,five sets of valid data were obtained,and the five groups of vibration data results were fitted by the Sadovski formula regression fitting.As a result,the correlation coefficient R of the fitting results in axial,radial and vertical directions are all greater than 0.8,which indicates that the linear correlation is good.Meanwhile,it also shows that the vibration propagation formula has a good applicability to the slope vibration attenuation law under this geological condition.Furthermore,with the increase of the distance from the blast center,the slope particle vibration velocity decreases continuously.Among the three directions,the peak vibration velocity of the horizontal radial direction,horizontal tangential direction and the vertical direction is largest,second and smallest,respectively.Therefore,The impact of the distance from the blast center on the blasting vibration velocity is much greater than that of the elevation.By using this formula to develop the blasting vibration prediction software,the vibration peak value of measuring point position can be predicted,the maximum single-stage detonating charge and the vibration safe distance can be checked through the given parameters,which provide the data basis for solving the non-working slope stability.
作者
安胜杰
易吉祥
池恩安
于海阔
欧阳天云
AN Sheng-jie;YI Ji-xiang;CHI En-an;YU Hai-kuo;OUYANG Tian-yun(Poly Union Group Co.,Ltd.,Guiyang 550002,China;Anshun Xinlian Blasting Engineering Co.,Ltd.,Anshun 561000,China;Poly Xinlian Blasting Engineering Group Co.,Ltd.,Guiyang 550002,China;Poly Explosive Hami Co.,Ltd.,Hami 839200,China)
出处
《爆破》
CSCD
北大核心
2021年第2期32-36,166,共6页
Blasting
基金
2019年新疆维吾尔自治区引进高层次人才天池计划。
关键词
露天煤矿
爆破地震波
萨道夫斯基公式
爆破振动预测软件
open-pit coal mine
blasting seismic wave
sadovski formula
blasting vibration prediction software
