Control technology of mine pressure bump occurred by floor dynamic loading in rise gateways of deep mine

In order to prevent the mine pressure bump occurred by the floor dynamic loading in the rise gateways of the deep mine, a FLAC2 Dnumerical simulation software and the microseism monitoring and measuring system were applied to the study on the control technology. The study results showed that under the role of the static load, the floor horizontal stress of the rise gateway, vertical displacement and plastic zone depth would be 38.27 MPa, 156.38 mm and 4 m individually and under the dynamic load disturbances, the floor bump response features were increased by 8.96 MPa, 266.92 mm and 2 m individually and the bump danger was steeply incre ased. The dynamic disturbances could make the stress increased of the coal pillars in the rise gateways under the limit condition and then could break the balance stat e of the coal pillar and make the floor pressure bump occurred. Thus those would be the dynamic static load stacked induced pressure bump mechanism with the high s tatic load-strong dynamic load induction. The site microseism monitoring and measuring verified the rationality of the numerical simulation results. According to floor pre ssure bump features of the rise and dip gateways in the deep mine, the rational layout gateway was provided. With the local measures, the dynamic load transmission C ould be reduced and there were four avoidances for the dynamic disaster control measures.