斜井过向斜构造涌水原因分析及治理

Cause Analysis and Control of Water Inrush When Mine Inclined Shaft Passed Through Syncline Structure

针对山西黑龙矿副斜井在掘进至裂隙发育的向斜轴部时发生涌水,涌水量约120 m3/h,对施工造成严重影响的问题,首先根据水文地质条件及涌水特点,分析判断出涌水水源和涌水通道分别为太原组灰岩水和西沟向斜轴部裂隙发育区;然后针对西沟向斜岩溶裂隙发育,是构造富水带的特点,以"引水孔排水—注浆堵水—预注浆防水"为防治水思路,采用注浆封堵掘进工作面出水点和超前探水、预注浆相结合的治理方案;最后采用打检验孔和瞬变电磁超前探测的方法对注浆效果进行检验,斜井掘进后仅局部有淋水现象,涌水量3～4 m3/h,注浆封堵效果显著。

According to the water inrush occurred when the mine auxiliary shaft excavated at the crack developed syncline axial section,the water inrush quantity was about 120 m3/h and the water inrush caused a serious problem to the mine inclined shaft construction.Firstly according to the hydrological conditions and the water inrush features,the paper analyzed and determined the water inrush source and water inrush channel,individually as the Taiyuan Group limestone water and the crack developed zone of the Xigou syncline axial section.Then according to the Xigou syncline,the crack development of the limestone was the features of the structure watery zone.Taking the diversion hole for water drainage—grouting for water sealing—pregrouting for water prevention as the water prevention and control idea,the grouting to seal the water outlets at the coal mining face,the pilot water detection and the pregrouting combined control alternative was applied.Finally the checking hole drilling and transient electromagnetic pilot detection method was applied to inspect the grouting effects.After the mine inclined shaft excavated,some roof area of the inclined shaft would have raining phenomenon.The water inrush quantity was 3～4 m3/h.The grouting sealing effect was obvious.