Abstract:   To study the creep supporting effect of deep strip pillar，the creep test of upper No.3 coal seam in Daizhuang Coal Mine is carried out．Based on the experiment results，the creep supporting effect of deep coal pillar was analyzed by using LS-DYNA software．The results show that the circumferential initial creep stress of the coal/rock sample is 3.061 MPa，which is far below the axial initial creep stress of 7.020 MPa．In addition，the creep strength and creep coefficient are 9.327 MPa and 0.647，respectively．Combined with the test results，the creep supporting effect of deep strip pillar can be simulated excellently by LS-DYNA software．The stress and deformation in simulated strip pillar show evident rheological properties．The situation of the pillar still changes greatly after the extraction of coal face．Under the effect of the overlying strata，the deformation of coal pillar is unchanged after15 ~ 16 months，and can keep stability for a long time.

Key words:  , creep test；deep coal pillar；LS-DYNA software；numerical simulation；creep supporting effect