摘要
常村煤矿S3-9工作面回风巷受回采动压影响,巷道发生特大变形,积水严重,巷道高度由3.2m收敛为1.2m。分析了该段泥岩顶板岩样成分,采用数值软件UDEC对S3-9工作面回采后巷道的变形、破坏机理、注浆参数及注浆效果等进行了分析,决定采用水泥化学浆和二次注浆锚索进行综合锚注加固,并在S3-9工作面回风巷进行了试验。实践结果表明顶底板最大移近量20mm,两帮最大移近量30mm,变形得到有效控制。
Influenced by mining dynamic pressure, serious deformation had appeared in the S3-9 return airway of Changeun Coal Mine, water accumulation was also serious there, so that the height of roadway reduced from 3.2 m to 1.2 m. In this paper, the ingredients of rock sam- ples from mudstone roof were analyzed, then the deformation and failure mechanism, slip casting parameters and effects after mining were also analyzed by using UDEC software. After the analy- sis, cement chemical grouting and secondary grouting cable anchors were adopted for comprehen- sive bolt-grouting reinforce, which was then experimented in return airway of S3-9 working face. The results showed that the biggest convergence between roof and floor was 20 mm and the big- gest convergence between roadway＇s sides was 30 ram, so the deformation of roadway was con- trolled effectively.
出处
《中国煤炭》
北大核心
2015年第5期46-48,62,共4页
China Coal
基金
国家自然科学基金委--神华集团煤炭联合基金重点项目(U1261211)
关键词
动压冲击
围岩变形
围岩加固
锚注技术数值分析水泥化学浆
注浆锚索
dynamic pressure impact, surrounding rock deformation, surrounding rock rein-force, bolt-grouting technology, numerical analysis, cement chemical grouting, grouting cable anchor
