Abstract: Slow speed and low efficiency of 5308 bottom drainage roadway in a mine of Shanxi directly affect gas drainage in working face.In order to improve the above situation,the hole spacing is studied.Using ANSYS to simulate and analyze the effect of rapid tunneling under different hole spacing and verify it on site,the best hole spacing of the suitable mine is obtained.The results show that when the hole spacing is 500 mm,the crack growth area and rock damage area are the largest,and the effect of fast tunneling is the best.

Key words: Drilling and blasting method, Fast driving, Blasting, Soft ware ANSYS