深孔台阶爆破近区振动强度分布的模拟研究  

Simulation study on distribution of vibration intensity in near field of deep hole bench blasting

作　　者：韩亮[1] 李红江[2] 辛崇伟 凌天龙[4] 李晨[4] HAN Liang;LI Hongjiang;XIN Chongwei;LING Tianlong;LIChen(Safety Engineering College,North China Institute of Science and Technology,Beifing 101601,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology（Beijing）,Beijing 100083,China;School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Mechanics ＆ Civil Engineering,China University of Mining and Technology（Beijing）,Beijing 100083,China)

机构地区：[1]华北科技学院安全工程学院,北京101601 [2]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [3]北京科技大学土木与环境工程学院,北京100083 [4]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《煤炭学报》2018年第B06期71-78,共8页Journal of China Coal Society

基　　金：中央高校基本科研业务费资助项目(3142017092);廊坊市科技支撑计划资助项目(2017013149);国家自然科学基金资助项目(51504096)

摘　　要：为了探索深孔台阶爆破近区振动强度的分布规律,基于现场单孔爆破试验,在爆区后方构建5排×17列的测点方阵模型,在考虑震波频率随传播距离衰减的基础上,利用Anderson线性叠加模型来模拟单排炮孔在不同爆破条件下振动"场"的变化情况。结果表明:随炮孔数目的增多,振速等值线外移,等值线中心逐渐与炮孔连线平行,平行炮孔连线方向上振速的增加幅度逐渐减小,垂直炮孔连线方向上振速沿传播距离的衰减速度逐渐增大;随炮孔距离的增加,炮孔连线方向上地震波能量流动比例增加,流动方向从近似沿小球面逐渐变为大球面扩散,振速等值线变得粗糙,平行炮孔连线方向上爆破近区中心一定范围内测点的振速减小,两边振速增大,垂直炮孔连线方向上近区测线振速沿传播距离的衰减速度加快,远区则减慢并最终趋于一致;随炮孔装药量的增加,炮孔连线上能量密度增加,振速等值线的强度增大,平行炮孔连线方向上爆破近区中心测点振速的增长幅度明显大于两边,垂直炮孔连线方向上振速沿传播距离的衰减速度逐渐增大。In order to explore the distribution of vibration intensity in the near field of deep hole bench blasting,based on single-hole blasting field test,this paper constructed a 5 rows and 17 columns matrix model behind the blasting area,considering the seismic frequency attenuation with the spreading distance,using the Anderson model to simulate the changes of vibration ＂field＂of single row holes under different blasting conditions. The results show that with the increase of the number of holes,the vibration velocity contours are shifted outwards,and the contour center is approximately parallel to the hole line.In the parallel hole line direction,the increasing degree of the vibration velocity gradually decreases with the increase of the number of holes,while in the vertical hole line direction,the vibration velocity attenuates gradually faster along the spreading distance.With the increase of hole spacing,the ratio of seismic wave en-ergy flow in the hole line direction increases also,and the flow direction gradually diffuses from the approximation along a small spherical surface into a large spherical surface,as well as the vibration velocity contour is gradually rough.In the parallel hole line direction,the vibration velocity of measuring point in the center of a certain range in blasting near field decreases with the increase of hole spacing,while the vibration velocity of measuring point on both sides increases,and in the vertical hole line direction,the vibration velocity attenuates gradually faster along the spreading distance in near field,while the vibration velocity attenuates gradually slowing down in far field,eventually converging.With the increase of hole charge,the energy density in the hole line direction increases,as well as the intensity of the vibration velocity contours.In the parallel hole line direction,the increasing degree of the vibration velocity of the central measuring point is significantly greater than that on both sides in near field,while in the vertical hole line direction,the vibr

关 键 词：群孔爆破 近区 爆破条件 ANDERSON模型 振动强度 分布 

分 类 号：TD235[矿业工程—矿井建设]