大冶铁矿露天转地下开采爆破对露天边坡影响的研究

根据现场测试获得的爆破地震波形进行计算得到的爆破地震反应谱曲线, 运用有限元软件, 对大冶铁矿东露天转地下开采无底柱分段崩落法回采挂帮矿爆破对露天边坡的影响进行研究, 结果表明,露天转地下开采爆破地震波所引起的露天边坡的应力和位移值都很小, 不会影响边坡的安全。另外, 对采空区充填废石, 不仅有效限制了边坡岩体的水平和垂直方向的位移, 还改善了边坡岩体的受力状态, 提高了边坡的稳定性。

Blast Vibration Influences on Slope During Transformation of Surface Mining to Underground Mining

According to the blasting vibration spectrum curve resulted from a field experiment,a finite element software was used to analyze the blast vibration influences on the slope during the transformation of surface mining to underground mining at Daye Iron Mine,Wuhan Steel & Iron Company,China.The result of the study shows that the stress and displacement of the slope is very small and will not influence the safety of the slope.During surface mining transformed to underground mining,gangue limits the horizontal and vertical displacement of the slope and also improves the stability of the slope.