An Experimental Investigation for Seepage-Induced Instability of Confined Broken Mudstones with Consideration of Mass Loss

摘要: To study and prevent water-mud-outburst disasters of tectonic fracture zones in geotechnical engineering, we tested seepage stability confined broken mudstones with consideration mass loss using syringe method a self-designed testing system, obtained the variation laws instable duration, total loss, rate under different pressure gradients Talbol power exponents (simplified as hereafter), explained their behaviors. The results showed that is internal cause seepage-induced instability rocks gradient external cause, persistent migration particles result progressive failure process, while large enough causes sudden overall instability. duration shortens increasing, longest shortest at 0.5 0.1, respectively. In general, increases increasing decreasing. Mass but shows no monotonic changes Talbol. Their expressions can be used to establish dynamic model further researches.