摘要
高边坡爆破开挖会引起岩土体结构松弛、强度降低,进一步促进裂隙的产生和发展,对边坡的安全稳定有不利影响。针对溢洪道高边坡开挖施工工程地质条件差、施工作业环境复杂敏感的特点,采用现场爆破试验、爆破振动跟踪监测等技术手段,结合开挖边坡岩体地质力学条件及现场边坡开挖振动情况分析,确定爆破振动控制标准为2.0cm/s,并根据爆破振动衰减规律计算得到不同高程的开挖爆破最大允许单响药量,以指导边坡爆破施工,从而有效地控制了爆破振动破坏范围,确保了边坡开挖工程安全、快速、高效的进行。
The blasting excavation of high slope makes the rock structure slacked and intensity reduced,and gives a further promotion of the birth and development of the cracks,which brings some adverse effects of the slope stability.Aiming at the characteristics of poor engineering geology condition and complicated and sensitive working environment of the excavation construction of the spillway high slope,some technological means such as field blasting test and blasting vibration monitoring is adopted.Combining the rock geomechanics condition of excavated slope with the analysis of the vibration condition of field slope excavation,the control standard of the blasting vibration is determined to be 2.0cm/s.The allowable maximum explosive quantity of blasting excavation at different levels can be the guide to blasting construction of slope which is calculated according to the attenuation law of blasting vibration.Thus,the damage effect of blasting vibration is controlled effectively.Thus,it ensures the excavation construction of slope safe,fast and efficient.
出处
《水电能源科学》
北大核心
2014年第11期133-136,共4页
Water Resources and Power
基金
国家自然科学基金项目(51009104)
关键词
黄金坪水电站
高边坡
爆破振动
现场监测
衰减规律
Huangjinping hydropower station
high slope
blasting vibration
on-site monitoring
attenuation law
