摘要
某矿尾矿坝正准备二期扩容工程,附近有露天残采爆破作业,为分析该爆破振动对现阶段及二期扩容后尾矿坝稳定性的影响,根据现场爆破测振结果,拟合库区间爆破振动最大振速公式,计算分析库区距震源最近处的最大振速是否满足《爆破安全规程》要求,并采用Geo-Studio岩土软件中Quake/W和Slope/W模块,分别对现阶段及二期扩容后尾矿坝动力稳定性进行数值模拟计算.计算结果表明:该尾矿库库区距爆源最近处的最大振速2.344 cm/s,小于《爆破安全规程》中允许的标准值,满足安全规程要求;现阶段尾矿库剖面1、2在爆破振动下的最小安全系数分别为1.273和1.471,二期分别为1.267和1.473,均大于《尾矿库安全技术规程》中规定的最小安全系数,符合安全规程,尾矿库二期扩容工程是可行的.
This paper studies the effect of the open-pit blasting vibration on the stability of a vicinal tailings dam, whose capacity is to be expanded by calculating the largest range of blasting vibration velocity vibration library formula according to the site blasting vibration measurement results. We calculated and analyzed the largest velocity in the closest point to the explosive source to determine whether it satisfied the blasting safety regulations. The Quake/W and Slope/W module of geotechnical software Geo-Studio were applied to simulate the dynamic stability of the railings dam at the present stage and the second phase expansion stage. Calculation results show that the maximum velocity at the closest point to the explosive source is 2.344 em/s, which is lower than the allowed values in blasting safety regulations. The minimum safety factors of tailings dam at the present stage under blasting vibration are 1.273 and 1.471. The minimum safety factors of the second stage are 1.267 and 1.473. They are greater than the specified minimum safety factor in the tailings safety technical regulations. This paper illustrates that the open-pit blasting vibration has no effect on the stability of near railings dam, and the second phase expansion project is feasible.
出处
《有色金属科学与工程》
CAS
2015年第5期102-107,共6页
Nonferrous Metals Science and Engineering
基金
江西省科技支撑计划重点项目(20141BBG70097)
江西省工业安全工程技术研究中心开放基金项目(2013GGY001)
