基于灰关联法的超近距条件下石窟减震控制爆破敏感性分析  

Sensitivity Analysis of Shock Absorption Controlled Blasting in Grottoes under Ultra-close Conditions Based on Grey Correlation Method

作　　者：汪为平 王雨波[1,2] 刘海林 李宁[1,2] 刘帅 李鸿飞[1,2] WANG Weiping;WANG Yubo;LIU Hailin;LI Ning;LIU Shuai;LI Hongfei(Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.,Maanshan 243000,China;State Key Laboratory of Safety and Health for Metal Mines,Maanshan 243000,China)

机构地区：[1]中钢集团马鞍山矿山研究总院股份有限公司,安徽马鞍山243000 [2]金属矿山安全与健康国家重点实验室,安徽马鞍山243000

出　　处：《金属矿山》2021年第12期154-159,共6页Metal Mine

摘　　要：在既有地下石窟附近超近距范围内实施减震控制爆破,既有石窟一侧围岩保护受地质条件、爆破参数、保护对象空间结构造型及岩体质量等多因素影响,存在较大难度。实践中,采用传统峰值振速和主峰频率指标进行控制时,受保护一侧的破碎围岩小型块体掉落往往表现出一定的随机性,对单因素实施减震措施改进时,往往厚此薄彼,减震效果时好时坏。对此,采用灰色系统理论中的灰关联法对超近距条件下的爆破振动造成小型岩块掉落致因进行敏感性分析,明确破碎围岩小型岩块掉落与影响因素之间的关联程度,从关联度较大的单因素或多因素入手优化减震措施,从而实现对既有工程一侧破碎围岩的有效保护。The shock absorption controlled blasting is implemented in the ultra-close range near the existing underground grotto.The protection of the surrounding rock on the side of the existing grotto is affected by many factors such as geological conditions,blasting parameters,spatial structure modeling of the protected object and rock mass quality,The controlled blasting is difficult.In practice,when the traditional peak vibration velocity and main peak frequency index are used to control,the falling of small blocks of broken surrounding rock on the protected side often shows certain randomness.When improving the single factor damping measures,it is often thick and thin,and the damping effect is good or bad.In this regard,the grey correlation method in grey system theory is used to conduct sensitivity analysis on the causes of small rock block falling caused by blasting vibration under ultra-close conditions.The correlation degree between the small rock block falling of broken surrounding rock and the influencing factors is clarified,and the damping measures are optimized from the single or multiple factors with large correlation degree,so as to realize the effective protection of the broken surrounding rock on the existing engineering side.

关 键 词：超近距减振爆破 灰色系统理论 灰关联分析 敏感性分析 石窟开挖 

分 类 号：TD235[矿业工程—矿井建设]