【摘要】 通过一炮多段法获得的爆破震动测试数据,研究了某露天采场边坡爆破震动传播规律;建立了滑坡体爆破动力响应分析模型,基于运动单元法得出了爆破地震系数Ad与边坡安全系数Kd的关系;水平加速度指向台阶坡面时,边坡爆破动力响应最大;通过水平加速度和垂直加速度关系的研究,得出了保证边坡安全的许可垂直振动速度为15.58cm·s-1;给出了保证边坡安全的比例药量计算公式.更多还原

【Abstract】 The vibration transmission regulation of blasting in a high steep slope in certain sulphur-iron is studied through 7 times blasting once detonated by EXP3850 blasting induced vibrations analysis system;Model of slope’s dynamic response to vibrations induced by blasting is given. The relationship between blasting seismic coefficient and slope stability coefficient are established based on kinematics element analysis. The slope’s dynamic response to blasting is at its maximum when horizontal acceleration points to the surface of slope. The vertical vibration velocity (15.58 cm·s-1)permitted by the safety of slope is deduced from the study of relationship between horizontal acceleration and vertical acceleration. Formula to determine scaled charge weight is provided to keep slope’s stability.更多还原