Improvement of shock system of hydraulic drill to increase drilling intensification

[摘要] The article deals with features of drilling and blasting operations with the use of hydraulic drills prevailing in the amount of use as drilling heads on drilling (mining) equipment. The device and the operating principle of hydraulic drills are discussed. In order to increase the intensification of drilling, the modernization of hydraulic drills is proposed by using the "shock-worker -striker - shank" shock system, which is characterized by an increase in the transfer coefficient of the shock pulse through the striker, performing high-frequency oscillations (rattling striker) between the shock-worker and the shank. A graph of the dependences of the parameters of the modernized shock system is given and the conditions for the existence of the rattling phenomenon of the striker due to which the drilling productivity is expected to be increased are indicated.

[发布机构] Saint-Petersburg Mining University, 21 Line of Vasilyevsky Island, Saint-Petersburg 2; 199106, Russia^1;Metromash-SPb Organization, Fuchik's Street 4, Saint-Petersburg; 192102, Russia^2

[效力级别] 电工学

[关键词] Drilling and blasting operations;High frequency oscillations;Operating principles;Shock pulse;Shock system;Transfer coefficient