深部高地应力爆破振动质点峰值速度变化特性数值模拟研究  

Numerical Simulation on Variation Characteristics of Blasting Vibration Particle Peak Velocity under High In-situ Stress

作　　者：尤元元 崔正荣 李二宝 YOU Yuan-yuan;CUI Zheng-rong;LI Er-bao(Sinosteel Maanshan General Institute of Mining Research Co Ltd,Maanshan 243000,China;Maanshan Institute of Mining Research Blasting Engineering Co Ltd,Maanshan 243000,China)

机构地区：[1]中钢集团马鞍山矿山研究总院股份有限公司,马鞍山243000 [2]马鞍山矿山研究院爆破工程有限责任公司,马鞍山243000

出　　处：《爆破》2020年第4期36-42,共7页Blasting

基　　金：“十三五”国家重点研发计划课题--深部高储能矿岩组孔超前致裂精准爆破技术(*2017YFC0602902)

摘　　要：高地应力环境是近年来深部矿山爆破开采困难的主要原因之一,研究爆破荷载与高地应力的耦合作用下爆破振动的衰减机制,是开展“深部高储能矿岩组合孔超前精准爆破技术”的前提。以深部单炮孔爆破作用下的岩体为研究对象,设定开采深度分别为1000m,1500m、2000m、2500m、3000m及无围压6种工况进行数值模拟及回归分析。结果表明:不同地应力环境对爆破作用下深部岩体破碎近区单元速度峰值到达时间及基本走势没有影响;随着地应力的加大,在最大/最小主应力方向上均表现为对爆炸冲击波的抑制作用和对爆炸应力波的小幅促进作用。但在最大主应力方向上,在炮孔近区由近至远范围变化中,表现为地应力对爆炸冲击波的强抑制作用。在最小主应力方向上,在炮孔远区由近至远范围变化中,地应力对爆炸应力波的小幅促进作用。High in-situ stress is one problem for the deep mine blasting.The attenuation mechanism of blasting vibration under the coupling action of blasting load and high in-situ stress is the premise of carrying out "advanced precise blasting technology of deep high energy storage ore and rock combination hole".Taking the rock mass under the action of deep single hole blasting as the research object,the mining depth was set as 1000 m,1500 m,2000 m,2500 m,3000 m and without confining pressure for numerical simulation and regression analysis.The results show that different in-situ stress environment has no influence on the arrival time and basic trend of the unit velocity peak in the near deep rock fracture zone for blasting.With the increase of the stress,the inhibition of the explosion shock wave and the small promotion of the explosion stress wave are shown in the direction of maximum/minimum principal stress.However,in the direction of the maximum principal stress,in the range from near to far,the ground stress has a strong suppression effect on the blast wave.In the direction of the minimum principal stress,in the far region of the hole from near to far range variation,the ground stress has a small promoting effect on the explosion stress wave.

关 键 词：高地应力 高储能矿岩 质点峰值速度 数值模拟 回归分析 

分 类 号：TD853[矿业工程—金属矿开采]