The application of MS-delay pre-splitting blasting and MS-delay close-drilling pre-splitting blasting in the high rock slope excavation for CMICT dock was introduced.

The application of MS-delay pre-splitting blasting and MS-delay close-drilling pre-splitting blasting in the high rock slope excavation for CMICT dock was introduced.

Numerical simulation of improving permeability by deep-hole presplitting explosion in loose-soft and low permeability coal seam;

In this dissertation, several researching methods, such as theory analysis and numerical simulation and on-field experiment as well as practical engineering application, are used to systematically study the promoting permeability effect of deep-hole presplitting explosion as well as action mechanism of promoting gas drainage and preventing coal-gas outburst.

The vibration testing analysis of blasting in Tai-Chang freeway show that it is chamber & deep-hole pre-splitting blasting that can strikingly drop the seismic effect of chamber blasting,so it effectively solves some problems of slope stability,slope quality and safety of building & structure that blasting vibration brings about.

The vibration testing analysis of blasting in Tai Chang Exprassway shows that chamber & deep-hole pre-splitting blasting can strikingly drop the seismic effect of chamber blasting,so it effectively solves some problems of slop stability,slop quality and safety of building structures caused by blasting vibration.