Based on the charge weight, detonating mode and the dynamic characteristics of the rock mass around the hole, a method of computing of blasting load applied on the excavating surface of the slope is given in this paper.

According to the data of a anti-airplane gun testing in shooting range,the significance effect test was made by the variance analysis for the sample values of the probable error of muzzle velocity with three different charge weight.

The engineering practice of an underwater controlled blasting of rocks for embedded pile foundation of a bridge shows that the charge weight is remarkably different from that of normal underwater blasting.

The uncoupling index,cartridge diameter,smooth blasting perimeter hole space,blasting deep,charge,blasting fashion est.

The numerical calculation results show that the critical collapse distance of peeling-off increases as the tunnel span extends,but there exists a limit value,which is related to rock quality and charge quantity.

To reduce the shock wave and save the explosive charge,the paper invents a new method of double vertical explosive welding by experiment.

This essay briefly describes the engineering principle of explosion-ex-pansion tubes and some experiences in its practice and it gives a much detailed exposition of the powder charge of the explosion-expansion tubes,the system combination,the construction quality of explosion-expansion and also safety problems.

The influence of impurities in TNT on the charge quality is studied by the determination method of solidifying point(T_s).