Experimental Study on Deformation Characteristics of Gangue Backfill Zone under the Condition of Natural Water in Deep Mines

To address the problem of surface subsidence caused by compression filling gangue in deep mines, a layered compaction test was designed based on zonation failure overburden goaf and property gangue. The deformation characteristics natural water-bearing states were obtained. during 0~100 kN loading stage an approximately positive S-type, which reflects relative “advancement” terms deformation. 100~500 inverted “lag” In state, load-time curves dead load consistent. Under condition, curve for had apparent “step” presented special phenomenon displacement rebound. gradient loading, strain showed exponential growth model, energy dissipation logarithmic model. consistently increasing distribution patterns, while normal model under state.