<p>This paper reviews energy parameters of rock fractures made using a wedge-shaped tool. The paper provides diagrams of distribution of forces and stresses under the impact of a wedge-shaped tool and stress components from two sources in the form of a wedge, localized in one row. There is a theory of energy intensity of rock fracture and energy of a single blow with a wedge-shaped tool which explains the energy parameters of rock fracture with a wedge-shaped tool. The new machine is based on static-dynamic methods of applying stresses to rock masses, which justifies the development of machines and mechanisms whose operating principle is based on static-dynamic methods of applying loads to rock masses.</p>