预裂缝充水对减震效果的影响分析  

Analysis of the Influence of Pre-splitting Fissure Water Filling to Damping Effects

作　　者：巫雨田[1] 房泽法[2] 

机构地区：[1]紫金矿业集团股份有限公司紫金矿冶设计研究院 [2]武汉理工大学资源与环境工程学院

出　　处：《现代矿业》2015年第8期14-17,38,共5页Modern Mining

摘　　要：运用ANSYS/LS-DYNA软件对预裂缝中不同充水高度时的台阶爆破进行数值模拟,获得平均减震率,通过对平均减震率随预裂缝中充水高度变化规律的分析,得出:预裂缝充水高度小于0.4倍预裂缝深度时,预裂缝充水对减震效果的影响不大;预裂缝充水高度大于0.4倍预裂缝深度时,随着充水高度的增加,减震效果下降迅速。结论对预裂爆破工程减震效果具有科学的指导意义。The bench blasting process of the different water filling height in pre-splitting fissure is simulated by ANSYS /LS-DYNA software,the average damping rate is obtained.The change rule of the average damping rate with the water filling height in pre-splitting fissure is analyzed in depth,the results show that the water filling height is lower than the depth of pre-splitting fissure of 0.4 times,the influ-ence of water filling in pre-splitting fissure is little;otherwise,with the increase of water filling height, the damping effects decreased rapidly.The above conclusion has the guidance significance of the damping effect of pre-splitting engineering.

关 键 词：台阶爆破 数值模拟 充水预裂缝 减震效果 

分 类 号：TD235[矿业工程—矿井建设]