巫雨田;房泽法;熊鹏;何治良;
WU Yu-tian;FANG Ze-fa;XIONG Peng;HE Zhi-liang;School of Resources and Environmental Engineering,Wuhan University of Technology;Zijin Mining Group Co.,Ltd.;

• 1:武汉理工大学资源与环境工程学院
• 2:紫金矿业集团股份有限公司

摘要(Abstract)：

为研究预裂缝充水对减振效果的影响,运用ANSYS/LS-DYNA建立有限元模型,对有、无预裂缝及预裂缝充水高度不同的台阶爆破进行了数值模拟,获得预裂缝后质点峰值振动速度。对比分析不同情况下的预裂缝后质点峰值振速,结果表明:预裂缝充水小于0.2倍预裂缝深度时,充水对减振效果影响小,减振率降低约3%,预裂缝后质点峰值振速衰减符合指数关系;预裂缝充满水时,充水对减振效果影响大,减振率降低约30%,预裂缝后质点峰值振速衰减符合萨道夫斯基公式。因此,工程实际中应避免预裂缝中大量充水。
In order to analyze the impact of filling water in presplitting crack on vibration reduction effect,a finite element model was established by using ANSYS/LS-DYNA and numerical simulation of bench blasting under the conditions of no presplitting crack and different depths of filling water in presplitting crack were carried out.The values of peak particle velocity were obtained.Comparing the peak particle velocity under different conditions,the research results showed that when the depth of filling water in presplitting crack was less than 0.2times of presplitting crack depth,the impact on vibration reduction effect was little,the vibration reduction ratio decreased by approximately 3%,and the attenuation curve of peak particle velocity fitted the exponential relationship.However,when the crack was filled with water,there would be significant effect on vibration-isolating effect and 30% decrease of vibration reduction ratio,and the attenuation curve fitted Sadov′s formula.Therefore,it can be concluded that filling large amounts of water in the presplitting crack should be avoided in the practice.

关键词(KeyWords)： 爆破;充水预裂缝;数值模拟;减振率;衰减规律
Blasting;Water-filling presplitting crack;Numerical simulation;Vibration reduction ratio;Attenuation law

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 巫雨田;房泽法;熊鹏;何治良;
WU Yu-tian;FANG Ze-fa;XIONG Peng;HE Zhi-liang;School of Resources and Environmental Engineering,Wuhan University of Technology;Zijin Mining Group Co.,Ltd.;

参考文献(References)：

• [1]张志呈,肖正学,张渝疆,等.工程爆破地震波的裂隙效应[J].西南科技大学学报(自然科学版),2004,19(3):57-60.
• [2]张喆,王幸荣.预裂缝宽度对减振效果影响规律的数值分析[J].爆破,2006,23(3):22-24.
• [3]娄建武,龙源,周翔,等.爆炸波传播的沟槽效应及分析[J].矿冶工程,2004,24(1):11-15.
• [4]余德运,杨军,赵明生.减震沟对台阶爆破地震波减震机理探讨[J].煤炭学报,2011,36(2):244-247.
• [5]易长平,陈明,卢文波,等.减震沟减震的数值模拟[J].武汉大学学报(工学版),2005,38(1):49-52.
• [6]方向,高振儒,龙源,等.减震沟对爆破震动减震效果的实验研究[J].工程爆破,2002,8(4):20-24.
• [7]卢文波,赖世骧,董振华.岩石钻爆开挖中预裂缝的隔震效果分析[J].爆炸与冲击,1997,17(3):193-198.