PULSED-VIBRATION ROCK DESTRUCTION

Authors

DOI:

https://doi.org/10.20535/1813-5420.0.2014.151116

Keywords:

electrostrictional vibrator, rotary boring, pulsed load, gadding

Abstract

The article considers the pulsed-vibrational way of rock destruction with strength f > 8 according to the M.M. Protodiakonov’s scale, which is based on the interaction of rotary boring, impulses in the frequency range of 3-5 Hertz and vibrational load by using electrostrictional method with frequency between 100-250 Hertz, that leads to “cutter- core compaction” modify and reduction of energy intensity of destruction due to decrease of cutters’ detrition. To ground the appropriateness of using the method, the mechanism of core compaction formation under static and dynamic load has been considered, the calculation of energy intensity for the process of cutting coal and rock has been conducted. The reduction of energy intensity of destruction is achieved by the reduction of cutters blunting due to periodical removal of axial load. At the moment removement of axial load, the shape of core compaction changes and the tool is chilled by drilling liquid.

References

Протасов Ю.И. Теоретические основы механического разрушения горных пород - М. : Недра, 1985. - 243 c.

Солод В.И., Гетопанов В.Н., Рачек В.M. Проектирование и конструирование горных машин и комплексов. Учебник для вузов. - M.: Недра, 1982. - 350 с.

Mалевич Н.А. Горно-проходческие машины и комплексы.Учебник для вузов. 2-е изд., перераб. и доп. - M.: Недра, 1980.- 384 с.

Issue

Section

TECHIQUE