Abstract: This invention relates to a method of charging drill holes for blasting, according to which method solid and liquid components of an explosive substantially each of them separately but simultaneously are blown or pumped, respectively, through its individual hose channel into the drill hole within which the components are intermixed as a result of the simultaneous pumping and blowing operations. The invention relates also to various recipes for preparation of explosives possessing properties especially fitted for the method in consideration. The invention also comprises an apparatus suited for carrying out the method.

Abstract: Method of blasting rock to attain a predetermined fracture result. The necessary energy for the blasting is provided at an amount and in an application which is decided by calculating the stresses with regard to previously plotted blasting effects and to a previously prepared description of the rock structure.