The paper introduces the applicated technology,computation methods of smooth presplitting blasting in mountainous freeway for reference.

Controlled smooth blasting technology applied to seam gateway and semi coal-rock roadway in Shouli Mine;

The research on the application of smooth blasting in fast excavation;

Application of smooth blasting one-step forming technology in drift driving for large-sized section;

The technology problems of blasthole depth,cutting blasting,smooth wall blasting,and directional blasting is discussed.

Adopting smooth wall blasting in excavation can reduce the vibration and the fracture to the surrounding rock, also it can guarantee the surrounding rock's perfection and stability.

Based on the smooth wall blasting technigue,smooth wall pipe split blasting technique is presented and the possibility, function and advantage of the method is confirmed by experiment,which contributed functional basis for effectivly managing the roof of under ground station and underground road rock of the gold min