立井破碎围岩注浆加固施工实践分析

Vertical shaft broken surrounding rock grouting strengthening construction practice analysis

对某矿副立井破碎带进行注浆加固施工,文中首先从压水试验、注浆材料、浆液配比注浆压力等参数设计了注浆工艺,选择了合理的注浆防护垫、注浆机械,分层对破碎带进行注浆加固。并对注浆效果进行模拟分析,结果表明,通过注浆能够有效改善井筒围岩受力,使应力分布更加均匀,有效改善了井筒围岩应力环境;大大降低了井筒塑性区的厚度;有效控制了井壁的收敛位移及底臌,对抑制井壁破坏及剧烈底臌起到了关键作用,表明本设计方案切实有效可行。

vice shaft fracture zone in addition to the grouting reinforcement construction,the article first from the water pressure test,the ratio of slurry grouting pressure,grouting material design parameters such as grouting process,choose the reasonable mechanical protection pad,grouting,layered for grouting reinforcement fracture zone.And simulation analysis was carried out on the effect of grouting,the results show that by grouting can effectively improve the wellbore wall rock stress,the stress distribution is more homogeneous,effectively improve the wellbore wall rock stress environment;Greatly reduces the shaft thickness of plastic zone;To effectively control the convergence displacement of the wall and bottom drum up,floor drum up on the inhibition of casing damage and severe played a key role,shows that this design scheme is effective and feasible.