六矿北山进风立井围岩破碎带注浆加固

Grouting Reinforcement of Broken Zone in Surrounding Rock of Beishan Air intake Shaft in No.6 Mine

六矿北山进风立井净直径6.8 m,井深669.5 m,500 mm厚C50素混凝土井壁。井筒自2011年开始使用以来,先后出现不同程度的变形和破坏,影响矿井安全生产。为此,采用深浅孔壁后注浆技术,对壁后破裂围岩进行注浆加固,取得较好效果,达到了预期目标。

The Beishan Air Intake Shaft in No.6 Mine had a net diameter of 6.8 m,a depth of 669.5 m and a C50 plain concrete lining with a thickness of 500 mm.Since the application of the mine shaft in 2011,there were different deformation and failure occurred before and after and the mine safety production was affected.Therefore a backwall grouting technology was applied with shallow boreholes.The grouting reinforcement was conducted in the backwall broken surrounding rock.A effect was obtained and an expected target was reached.