Abstract: On the north side of Biandanshan Mine，there are buildings and structures such as Anqing branch line of Hefei Jiujiang Railway and civilian houses. In order to protect the safety of railway and civil⁃ ian houses，the types，distribution，severity and potential accident hazards of seismic effects，blasting fly⁃ ing stones，blasting air shock wave，blasting and production dust and other dangerous and harmful factors produced in the blasting process are analyzed，and the safety and reliability of relevant blasting parameters for the operation of Hefei Jiujiang Railway are analyzed. According to the geographical relationship be⁃ tween the open-pit mining area and Hefei Jiujiang railway and the on-site operation conditions，blast um blasting vibration tester is used to conduct blasting tests on the test points arranged on the site. According to the blasting test results，the blasting attenuation coefficient is calculated by regression，the blasting engi⁃ neering level is determined，and the blasting vibration speed，blasting impact and blasting flying stone and other safety distances produced by the open-pit blasting operation are calculated. According to the relevant technical standards and specifications，the safety impact analysis of the open-pit blasting mining in the northeast of the mining area on Hefei Jiujiang Railway is carried out. According to the analysis results，the safety allowable vibration speed of blasting operation，the maximum detonating charge，the safety allow⁃ able distance of blasting and blasting vibration meet the requirements，and will not pose a safety threat to Hefei Jiujiang Railway.

Key words: open-pit blasting, vibration speed, regression calculation, security impact