Based on the roadway section and the constructing condition,the test of roadway excavation through hard rock improves the technology of blasting by stages in straight hole gate excavation,and centralizing on the effect of gate excavation,optimizes the related working procedure;not only boosts the blasting efficiency and cycle advance,but also reduces the consumption of materials and supplies.

Through application of this technique in tunneling of hard rock, the blasting efficiency is improved.

The blasting efficiency of rock roadway construction was raised.

Taking a high-deep rock slope of Changba open-pit mine in Gansu as an example,the explosive effect on evaluation of slope stability was discussed and the experiential method presently used in slope engineering was analyzed.

According to the"Safety Regulation of Explosion",the thesis analyzes the influences of explosive effect in Hunshuitang mining area to the road section draw near to it of Gaohai highway,around the lake Dianchi a new project,in order that present references for both of detonation work of the mine and the fortification of the highway section near the mine.

A few points of suggestion for improving blasting effect in tunneling operation at small or medium scale underground mines;

The disappointing blasting effect is difficult to slove in mining project in Yichun Tantalum-niobium Mine.

In order to analyze the blasting effect of linear charge at different cavity ratios, the changes of stress field and the destroyed effect at five cavity ratios were investigated by dynamic photoelasticity in experimental models.

Study on forecasting smooth-surface blasting effects based on BP neural network;

Prediction of bench tight blasting effects by genetic neural network;

Based on the analysis and research on the cause of the higher total cost resulted from high blounder yield and frequent rock toes in a certain quarry,a series of technical measures,which takes improving blasting effects as center,are put out.

The design and the mechanics principles of directionally demolishing a tower building by blasting,the implementation method,the protection measures and blasting effectiveness are introduced.

This paper deals with measurement of rock blasting effect.

Conventional methods for forecasting of blasting effect in rock mass often meet great difficulty since relationship between blasting effect and its influencing factors is highly complicated nonlinear one.