Experimental Investigation on Seepage Stability of Filling Material of Karst Collapse Pillar in Mining Engineering

Figure 1

Test system. I-pore water pressure control apparatus, II-data acquisition apparatus, III-seepage apparatus, IV press machine (MTS816.03), S1–S5 switches, A-hydraulic pump station, B-pressure relief valve, C-reversing valve, D-one-way valve, E-double-acting hydraulic cylinder, F-water pump, G-fluid flow meter, H-pressure transducer, I-paperless recorder, J-computer; K-water outlet. (1) Water inlet piston, (2) O-shape rubber seal ring, (3) upper porous plate, (4) sealing material, (5) rock specimen, (6) lower porous plate, (7) cylinder tube, and (8) based pedestal.