伊犁1号井砾石层冻结窗口注浆处理

Grouting Treatment of Freezing Window in Gravel Bed of Yili No.1 Mine Shaft

伊犁1号井副立井采用冻结法施工,冻结深度430m,冲积层深159.05m,主要为砾石层。井筒掘进到89.6m深时,掘进工作面出现异常涌水;原因是地下水流速大,冻结壁出现窗口。经研究,决定先采用冻结孔纵向测温技术来准确判定冻结窗口位置;然后采用工作面注黏土水泥浆技术,减缓流速,促使窗口闭合。方案实施后,取得预期效果,井筒顺利通过该段地层。

A mine auxiliary shaft of Yili No.1Mine was constructed with a ground freezing method,the freezing depth was 430 m,a depth of the alluvium was 159.05 m and a gravel bed was a main stratum.When the mine shaft was excavated at a depth of 89.6m,there was abnormal mine water inflow occurred in the mine shaft sinking face.The cause was that the underground water flow velocity was high and there was a window occurred in the freezing wall.With a study,a longitudinal temperature measuring technology with a freezing borehole was applied to accurately adjudge the location of the freezing window.Then a clay and cement grouting technology at the sinking face was applied to reduce the water flow velocity and make the window closed.After the plan conducted,an estimated effect was obtained and the mine shaft successfully passed through the stratum.