不同倾角层理岩体爆破应力波传播规律  

Propagation Law of Blasting Stress Waves in Stratified Rock Mass with Different Inclinations

作　　者：张斌[1] 吴超俊[1,2] 张学富 周元辅[1] 刘士洋[1] ZHANG Bin;WU Chao-jun;ZHANG Xue-fu;ZHOU Yuan-fu;LIU Shi-yang(College of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;China Railway Shanghai Design Institute Group Co.Ltd.,Shanghai 200070,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]中铁上海设计院集团有限公司,上海200070

出　　处：《科学技术与工程》2018年第23期205-211,共7页Science Technology and Engineering

基　　金：国家自然科学基金(51708070);重庆市教委科学技术研究资助项目(KJ1705144);重庆市高校优秀成果转化资助项目(KJZH17120)资助

摘　　要：以层理岩体地层隧道开挖爆破为研究背景,通过理论解析和数值模拟分析层理倾角变化对爆破应力波的传播影响。研究发现:层理对应力波具有一定的吸收和反射作用,加速了爆破应力波在层理岩体中衰减;层理倾角越大应力波的透射率越小,应力波透过层理的衰减度越大;当应力波由硬介质入射到软介质中时透射率小于1,反之透射率则大于1。当层理倾角大于30°时,应力波的反射率随层理倾角的增大而变大;小于30°时,应力波反射率随层理倾角的增大而减小。此外,运用公式求解得到质点振动速度衰减度随层理倾角变化关系。Taking the blasting in the tunnel excavation as background.The methods of theoretical analysis and numerical simulation are generally taken for analyze its effects on different angles in bedding rock.The study result showed that bedding has certain absorption and reflection action to the stress waves which accelerates the attenuation of blasting stress waves in stratification rock mass.The greater the inclination angle is,the smaller the transmissivity of the stress waves is.Namely,the attenuation of stress waves is greater.When the stress wave is incident from hard to soft medium,the transmissivity is less than 1,whereas the transmissivity is greater than 1.The stress wave reflectivity increases with the bedding angle when it is more than 30 degrees,the stress wave reflectivity decreases with the increase of bedding inclination,when it is less than 30 degrees.In addition,the relationship between the attenuation degree of the particle vibration velocity and the inclination angle change is obtained by using the formula.

关 键 词：层理岩体 爆破应力波 数值模拟 透射率 衰减 

分 类 号：TD235[矿业工程—矿井建设]