摘要
基于质点振速对岩体损伤的判据,利用Tc-4850爆破振动测试仪,对某大型露天铜矿的预裂爆破荷载作用下产生的边坡损伤效应进行了现场试验研究。研究表明:预裂爆破对高陡边坡的影响深度为0.45-0.75m;随着与爆源距离的增大,岩体爆破损伤程度减小,累积损伤效应逐渐变得不明显;水平和垂直方向测试结果存在着较大的差异,说明爆破作用下岩体损伤具有各向异性的特征。测试结果为进一步进行岩体力学参数的研究和高陡边坡的稳定性分析提供了参考依据。
Based on the rock mass damage criterion of particle velocity, slope damage effect is studied under pre - splitting blas- ting load by experiment in situ in a large copper mine by using the Tc -4850 blasting vibration tester. The study results indicate that the pre - splitting blasting of effect depth on high - steep slope is 0.45 -0.75 meter; the blasting damage degree of rock mass decrease with the increase of distance between blasting source and particle. And the cumulative damage effect gradually becomes invisible. The test results of the horizontal direction are different from that of the vertical direction. The above result indicates that rock mass has an anisotropic character. The result provides reference for study of rock mass mechanical parameter and analysis of the high - steep slope stability.
出处
《铜业工程》
CAS
2011年第6期15-17,共3页
Copper Engineering
关键词
预裂爆破
边坡开挖
岩体损伤
损伤判据
计算方法
pre- splitting blasting
slope excavation
damage of rock mass
damage criterion
computing method
