Search articles for by keywords:
боек

Reserch of modernized perforator-hammer for drifting special roadway the underground mines «Metrostroy»

The article describes the design of modernized hammer-perforators for tunnel complexes for construction of auxiliary mine workings of «Metrostroi», St Petersburg, protected by patents. The article deals with assembly variants of the executive device of percussion type for breaking faces of complicated structure. Particular attention is paid to hammers working in the mode of the «counter-shearing» accomplished by dual jackhammers. The results of experimental tests to determine pike penetration into rock array for different values of rock hardness and pressing force. It is noted that the proposed solution replaces manual labor, reduces working cycle time.