云锡多金属矿中深孔爆破振动速度衰减规律研究

Study on the Attenuation Law of Vibration Velocities for Medium-length Hole Blasting in Yunxi Polymetallic Mine

对云锡多金属矿地下中深孔爆破进行振动测试,分析监测数据,对振动速度、爆破药量及爆源距离的关系进行一元线性回归处理,求得地震波的衰减系数α=1.44964,k=84.7162,计算结果与爆破安全规程中的经验值相符,表明所得衰减公式适用该矿山,为矿山确定最大一段起爆药量提供了依据,同时也为类似矿山提供参考。

Vibration test of underground medium-length hole blasting was carried out in Yunxi polymetallic mine,and the tested data was analyzed.Furthermore,the simple linear regression was employed to analyze the relationship among vibration velocity,explosive dosage and the distance form explosion source.The acquired attenuation coefficient α of earthquake wave and equation coefficient k is 1.44964 and 84.7162 respectively,the calculated results are conformable to the value prescribed in ＂Safety Regulations for Blasting＂,this indicate that the obtained formula of blasting vibration attenuation is suitable for this mine,provides provide the basis for the determination of maximum delayed detonating explosive.Also,this can provide a reference for the similar underground mines.