Abstract: In order to discuss the characters and critical conditions when instability and disruption of rich-water packing material with different water-solid ratios under the mining disturbance and the effect of water-solid ratio to deformation characters of packing body,creep property and stress-strain characters of rich-water packing material in different stress conditions is studied by creep and stress-strain tests to get critical loads when instability and disruption of rich-water packing material with different water-solid ratios.The results show that the creep curve has decelerating and stable stage when stress level of the water-rich packing materials is low and it has decelerating,stable and accelerating stage when stress level reach critical load.The critical loads of rich-water packing material with water-solid ratios 1.7,2.5 and 3.0 instability and disruption are 92%,90% and 85% of their compressive strength at 28 d age respectively.Critical load decreases with the increase of water-solid ratio.The stress-strain curve has four stages of initial deformation,elastic deformation,plastic deformation and disruption stage.Elastic modulus decreases with the increase of water-solid ratio.

Key words: Rich-water packing material, Water-solid ratio, Creep property, Critical load