Experimental study on creep characteristics of infiltrated coal-rock under load

A series of laboratory tests were conducted, analyzing the influence stress level and infiltration time on creep properties coal-rock. The total damage variable based mechanics is defined coupling macro-benchmark timeliness, by characterizing pattern infiltration–stress effect variable. study shows that coal-rock underwent a process from surface drying shrinkage to water absorption swelling water-filled in test. With increase time, content tended eventually stabilizes, while uniaxial compressive strength was gradually decreased. stable strain kept increasing, which accelerated advance, its internal continued accumulate led destabilization damage. At same level, mechanical parameter decrease. Comparing theoretical model infiltrated with experimental data, developed this paper reflected whole deformation can characterize properties.