风化带井颈段涌水综合治理

Comprehensive Control of Water Inflow from Mine Shaft Collar in Weathering Zone

新城金矿5号立井开挖至4m深时,开始出现涌水。井筒所在位置,砂层和风化带较厚。涌水如不加以治理,随着井筒下掘,还会下渗,给后续施工带来困难。根据具体情况,临时锁口处采用混凝土封水层封水;井颈段采用多种临时措施治理涌水;井筒施工到基岩段后,进行壁后注浆封水,有效地治理了风化带处井颈段涌水,确保了井筒施工安全和工程质量。

When No.5 Mine Shaft of Xincheng Gold Mine was sunk at a depth of 4m,a water inflow was occurred.At the location of the mine shaft,the thickness of the sand stratum and the weathering zone were thick.If the water inflow was not controlled,with the downward sinking the mine shaft,the water would be penetrated downward and would cause the difficulties to the late construction.According to the certain conditions,a concrete water sealing layer was applied to the water sealing at the temporary lock of the mine shaft.At the mine shaft collar section,several temporary measures were applied to control the water inflow.When the mine shaft construction was at base rock section,a backfill grouting was conducted for the water sealing,would effectively control the water inflow at the mine shaft collar in the weathering section and could ensure the safety construction of the mine shaft and the project quality.