爆破影响下巷道振速及位移变化规律分析  

Analysis of vibration velocity and displacement variation of roadway under the influence of blasting

作　　者：何峰[1] 杨松 王富强[2] 李彬 HE Feng;YANG Song;WANG Fu-qiang;LI Bin(School of Mechanics and Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China;Shenhua Shendong Coal Group Corporation Limited,Ordos 017209,Inner Mongolia,China)

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [2]神华神东煤炭集团,内蒙古鄂尔多斯017209

出　　处：《工程爆破》2023年第5期132-139,共8页Engineering Blasting

基　　金：国家自然科学基金资助项目(51774167);国家自然科学基金面上项目(52174143)。

摘　　要：为深入了解露天爆破地震波对煤矿巷道造成的影响,以内蒙古某露天煤矿爆破对相邻煤矿巷道的影响为工程背景,运用ANSYS/LS-DYNA软件建立有限元模型,采用对比分析和最小二乘法相结合的方法研究了爆破振动对巷道围岩振速及位移的影响变化规律,且在爆破现场进行了巷道围岩收敛位移监测。结果表明巷道周围各质点的最大振速随爆心距增大而减小,巷道边墙两侧中部质点的最大位移随爆心距呈现间隔式递减。爆破振动对相邻煤矿巷道各侧围岩的影响程度不尽相同,收敛监测数据表明背爆侧围岩受爆破振动的影响最小,迎爆侧围岩受爆破振动的影响最大,巷道围岩基本处于稳定状态。运用最小二乘法反演得到萨道夫斯基公式中的K值和α值分别是30.814和1.085,可为预测露天煤矿爆破地震波对相邻巷道的影响提供一定的参考意义。In order to deeply understand the influence of open-pit blasting seismic waves on coal mine roadways,this paper takes the influence of blasting on adjacent coal mine roadways in an open-pit coal mine in Inner Mongolia as the engineering background,and uses ANSYS/LS-DYNA software to establish a finite element model.The method of comparative analysis and least square method is used to study the variation law of blasting vibration on the vibration velocity and displacement of roadway surrounding rock,and the convergence displacement monitoring of roadway surrounding rock is carried out at the blasting site.The results show that the maximum vibration velocity of each particle around the roadway decreases with the increase of the distance from the blasting center,and the maximum displacement of the middle particles on both sides of the roadway side wall decreases with the distance from the blasting center.The influence of blasting vibration on the surrounding rock of each side of the adjacent coal mine roadway is not the same.The convergence monitoring data show that the surrounding rock on the back side is least affected by blasting vibration,and the surrounding rock on the front side is most affected by blasting vibration.The surrounding rock of the roadway is basically in a stable state.The K value andαvalue in the Sadov's formula obtained by the least square method are 30.814 and 1.085,respectively,which can be used to predict the influence of blasting seismic waves on adjacent roadways in open-pit coal mines.

关 键 词：爆破振动 ANSYS/LS-DYNA 数值模拟 质点振速 位移 监测 

分 类 号：TV542[水利工程—水利水电工程] TU311.3[建筑科学—结构工程] TD235[矿业工程—矿井建设]