Taking Zhangjiachong Tunnel hydraulic pressure smooth blasting as an example,the article focuses on the key construction crafts and methods of tunnel hydraulic pressure smoothblasting,which will be good experiences for similar tunnel construction.

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

Factors affecting smooth surface blasting;

This article is detailed to introduce the principle,the method of smooth surface blasting,the choice of the parameter of smooth surface blasting,the standard and the advantage of smooth surface blasting,explaining the necessity of adopting smooth surface blasting.

At present,the application of smooth surface blasting for hydraulic tunnel becomes more and more popular.

By the middle deep hole opposite smooth blast can embrasure the utilization ratio of blast hole and the work efficiency,reduce the damage of surrounding rock,which not only can lift the safe parameters of building but also be favour of tunnel suport, cut down the lost of materials and achieve the high production and efficiency of mine.

In light of the actual blasting, the effect of the smooth blasting is better, with which overbreak or underbreak can be avoided effectively.

smooth blasting technology had been taken to excavate the central pilot drift and to widening the both sides.

herbal-medicine-pot blasting,deep hole blasting and smoothwall blasting are used for the blast working of the 1664577 cubic meter rockwork.

This paper describes the application of smoothwall blasting technique,the selection of explosion parameters,the quality control of construction process and result of smoothwall blasting,based on the example of Longtan Tunnel on Chengdu-Huaihua Railway Line.

The result of smoothwall blasting directly influences on the quality of liner concrete.