千米深盲竖井下行前进式注浆堵水施工技术

Water Plugging Construction Technology with Advance Downward Grouting for Kilometers Deep Blind Shaft

三山岛金矿是山东黄金主体矿山之一,现进入全面深部开拓、回采阶段,深部主要开拓工程区域距地表距离已超过1 000 m。盲竖井掘进工程至-1 070 m工作面时出现涌水量达46 m3/h的含水裂隙带,如何采取科学有效的治水方案,确保掘进工程的安全进行,已成为矿山亟待解决的问题。在此背景下,优化下行前进式注浆法的设计参数与实施方案,选用合理的注浆设备及材料;在详尽观测涌水部位并确定合理注浆孔施工顺序的基础上,在现场分3次进行了90 m段高的注浆作业。注浆方案在现场的实施取得了良好的防、堵水效果,注浆后的总涌水量小于0.5m3/h,为盲竖井掘进工程通过含水断层区域提供了安全可靠的保障;该注浆方法对类似金属矿山深井突水灾害的防治具有一定的指导与借鉴意义。

Sanshandao Gold Mine is one of main mines in Shandong Gold Group,which has entered deep mining and its main excavation depth has exceeded 1000 m away from the surface. Water-bearing fissure zone with 46 m3/h inflow are found in - 1 070 m level working face in blind shaft excavation project, and how to propose a rational water conservancy project to ensure construction safety is becoming an urgent issue to be solved. Based on the background above, the design parameters and implementation plan of advance downward grouting were optimized, with the proper equipments and materials adopted. Grouting operation of 90m high was carried out by three times after observation of water inrush area and determining proper arrangement of construction sequence. Favorable water plugging effect is achieved by the on-site implementation of grouting plan （ total water inrush volume less than 0.5 m3/h） ,which can guarantee excavation engineering safely passing water-bearing fissure zone. The above grouting method has certain guiding significance to similar water inrush prevention projects in metal mines.