小断面地质探洞爆破掏槽方式现场试验
Field Test of Blasting Cutting Mode of Small Section Geological Carving
李新翰1
作者信息
- 1. 江门市安恒爆破工程有限公司,广东 江门 529000
- 折叠
摘要
[目的]研究不同的掏槽方式对探洞爆破掘进的影响.[方法]在辅助孔和周边孔采用相同的布孔前提下,统计地质探洞实际爆破掘进中两种不同掏槽方案的爆破效果,分别从钻凿工作量、爆破进尺、爆破块度等三方面进行对比.[结果]统计结果表明,在坚硬岩层中,14孔掏槽方案比10孔掏槽方案多钻凿4个炮孔,用时占整个作业循环时长的4.4%,平均进尺超后者14.9%,且前者更具稳定性,破碎块更加均匀.[结论]通过对比两种不同掏槽方式的爆破效果,可为坚硬围岩条件下,小断面爆破掘进掏槽孔布置提供参考.
Abstract
[Purposes]In order to research on the influence of different cutting methods on the blasting ex-cavation.[Methods]The blasting effects of two different cutting schemes in the actual blasting excava-tion of geological caving are statistically analyzed under the premise of same layout of the auxiliary hole and the peripheral hole.The drilling workload,blasting penetration and blasting block degree are respec-tively compared.[Findings]The statistical results show that in the hard rock stratum,the 14-hole cut-ting scheme drilled 4 holes more than the 10-hole cutting scheme,accounting for 4.4%of the whole working cycle time,and the average penetration was 14.9%higher than the latter,but the former was more stable and more uniform.[Conclusions]Comparing the blasting effect of two different cutting meth-ods,this paper can provide reference for the cutting arrangement of small section blasting under the con-dition of hard surrounding rock.
关键词
探洞掘进/小断面开挖/掏槽方式/开挖进尺Key words
caving and excavation/small section excavation/cutting mode/excavation footage引用本文复制引用
出版年
2024
NETL
NSTL
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