In coal mine roadway excavation,normal smoothing blasting technology has the phenomena of over-excavation,under-excavation and severe damage on the surrounding rock,which makes it difficult to support in the later stage and leads to high maintenance cost.Based on the mechanism analysis of directional fracture control blasting technology,we proposed a controlled blasting technology with slit charge in perimeter holes,and conducted comparison tests between blasts with slit charge and normal charge.The test results show that a good blasting effect can be achieved by a PVC pipe with outer diameter of 38 mm,inner diameter of 36 mm,slit width of 4 mm and slit length of 600 mm for directional fracture controlled blasting.This kind of controlled blasting technology improves the flatness of the roadway section,smooths the excavation contour and increases the half-hole rate with a maximum value of 90%.The average linear over-excavation was 0.171 m with a reduction of 0.238 m.Due to the increased hole spacing of the perimeter holes,the powder factor has been saved by 25%,which means about 20 kg less explosive per cycle of footage,and thus blasting vibration has also been reduced.Directional fracture control blasting effectively reduces the damage to the surrounding rock,increases its stability and achieves a more satisfactory blasting effect.