摘要
针对钻爆法施工受限时硬岩掘进效率低下问题,提出了利用二氧化碳气相爆破方式对硬岩岩体进行松动致裂。以某矿煤仓掘进工作面为研究背景,运用理论分析和现场试验等方法设计了煤仓断面致裂孔布置参数,并进行了二氧化碳致裂松动现场试验。结果显示,在目前的技术体系下,由于封孔措施不当,二氧化碳气相爆破技术在硬岩致裂过程中未能达到预期的松动效果。根据试验反馈结果,提出了通过增设封孔装置、增设爆破能量导向裂隙及调整爆破参数的优化方法,并初步探索了适用于硬岩致裂的方案。这些改进思路有助于实现硬岩致裂并提高机械式掘进效率。
In view of the low efficiency of hard rock excavation when drilling and blasting method was limited, carbon dioxide gas phase blasting technology was proposed to loosen and crack hard rock mass. Taking a coal bunker excavation face as the research background, the fracturing hole layout parameters of coal bunker section were designed by theoretical analysis and field test, and the field test of carbon dioxide cracking and loosening was carried out. The results show that under the current technical system, due to improper sealing measures, carbon dioxide gas phase blasting technology can not achieve the expected loosening effect in the process of hard rock fracturing. According to the test feedback results, the optimization method of adding sealing device, adding blasting energy guiding fracture and adjusting blasting parameters was proposed, and the scheme suitable for hard rock fracturing was preliminarily explored. These improved ideas are helpful to realize hard rock fracturing and improve mechanical driving efficiency.
作者
甄恩泽
董世卓
李辰
ZHEN Enze;DONG Shizhuo;Li Chen(School of Civil Engineering and Architecture,Huangshan University,Huangshan 245021 China;Beijing China Coal Mine Engineering Company Limited,Beijing 100013,China;National Engineering Research Center of Shaft Construction,Beijing 100013,China)
出处
《建井技术》
2024年第3期10-15,共6页
Mine Construction Technology
基金
安徽省高校自然科学研究重点项目(KJ2021A1048)
安徽省教育厅质量工程项目-省级实验实训示范中心(2021SYJX01)
安徽省教育厅质量工程项目-土木工程实验实训中心(2021sysxzx028)。
关键词
气相爆破
致裂器
致裂孔布置
岩层致裂
快速掘进
gas phase blasting
splitter
layout of fracturing hole
rock fracturing
speedy drivage
