Dynamic response features of anchor support full seam gateway under pressure released,blasting and vibration

According to the pressure release blasting caused the mine roadiway surrounding rock falre and the bumping prevention effect reduced problems dueto the rational parameters based on the pressure release blastig vibration parameters measured with a PASAT-M mode portable microseismic system a blasting source model was applied to state the blasting vibration sources. Therefore a damage and falure model of the mine roatway surounding rock and the anchor supor seismic featres were studied on the FLAC3D4.0 platform.The study found that the shearing failre was the major falire mode of the mine roadvay surounding rock undert the blasting vibration. Under the blasting vibration,the stess level ofthe surrounding rock nearoy had small increasing.Among them.the horizonal tress wihn the roof was increased by 8%.the verical stess withn the blated sidewall vas increased by 8.3% and the elastic strain of the surounding rock near by was certainly released aner the blasting operation.The pressurereleased basting would cause theseam deformation and damage near the baoting secton of the support structure and would cause th axis force redvced of the anchor support Dil cene borescope method was applied to the site measurement on the cracking zoneof the mine roacwaysurrounding rock and the reliability of the numerical simulation results was verified.