Fig. 2From: Plugging efficiency of pouring aggregates through multiple boreholes into an inundated tunnel to prevent groundwater inrush disastersExperimental setup of the aggregate pouring process into an inundated mine tunnel through multiple boreholes under flowing water conditions. 1-water supply with a constant head; 2-water flow rate adjusting device; 3-water meter; 4-funnel for aggregate pouring; 5-tunnel replica; 6-inclination adjuster; 7-water cycling device; 8-camera; 9-PC; 10-data logger; 11-water pressure sensor; 12-electronical balanceBack to article page