V-shaped notch blasting is that cutting slots with certain depth along axis -direction of the hole is determined according to the blast-crazing, and then load uncoupled charge and detonation.

In this paper,incising blasting engineering in granite row stone exploitation as the research object,in order to analyze the fracturing mechanism principles of V-shaped notch blasting and the influence of blasting parameter changing to V-shaped notch blasting effect,the elastic-plastic isotropy and multi-notched hole of plane strain model is set up.

Ultra-Deep Indenting Blasting Under Complicated Conditions;

The existence theorem of blow-up solutions,the upper bound of "blow-up time",and the upper estimate of "blow-up rate" are given under some suitable assumptions on g,f and initial data.

By constructing an auxiliary function and using Hopf s maximum principles on it,existence theorems of blow-up solutions,upper bound of"blow-up time,"and upper estimates of "blow-up rate" were got respectively under suitable assumptions on f,g and initial function u\-0(x).

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

This paper presents the method of optimizing cutting blasting plan of rock roadways by means of grey system theory, and applies it to choose cutting blasting methods for hard rock roadways and achieves better effect.

Based on the theory as well as model test and engineering practice, some major techniques on cutting blasting and smooth blasting in rock tunnel are discussed .