煤炭与化工2023，Vol.46Issue(12)：14-18,5.DOI:10.19286/j.cnki.cci.2023.12.004
卸压孔浅部填充技术应用与围岩控制效果分析
Comparative study on the effects of organic acid and inorganic acid on the pore structure and mineral composition of coal
摘要
Abstract
Large diameter borehole pressure relief is a common measure to prevent rock burst in deep high ground stress roadway.In this paper,aiming at the engineering background that large diameter borehole pressure relief is still needed to prevent rock burst when the surrounding rock deformation of 2303 track crossheading in Guotun Coal Mine is serious,the measures of filling pressure relief hole in shallow part to improve the integrity of shallow surrounding rock are put forward.Firstly,according to the elastic theory,the mechanical model of the filled circular hole is established,and the stress expression of any point of the surrounding rock around the filled circular hole is derived,and the quick-setting high-strength material should be selected as the filling material.Then select the engineering experiment site to fill the shallow pressure relief hole and carry out on-site monitoring.The results show that after shallow filling,the axial force of the bolt near the pressure relief hole is higher than that far away from the pressure relief hole,and the deformation of the surrounding rock is obviously reduced.It shows that the shallow filling technology of the pressure relief hole can improve the strength of the shallow surrounding rock while ensuring the pressure relief efficiency of the deep coal body.关键词
钻孔卸压/浅部填充/理论分析/现场监测Key words
drilling pressure relief/shallow filling/theoretical analysis/on-site monitoring分类
矿业与冶金引用本文复制引用
郑义宁,张裕良,孟圣师,徐东康,姜启彬..卸压孔浅部填充技术应用与围岩控制效果分析[J].煤炭与化工,2023,46(12):14-18,5.基金项目
山东省自然科学基金项目(ZR2020QE119) （ZR2020QE119）
