POWERED ROOF SUPPORT FOR STEEP AND DIPPING FORMATIONS Russian patent published in 2015 - IPC E21D23/00 

FIELD: mining.

SUBSTANCE: powered roof support is offered for dipping and steep formations of medium thickness, containing the sections, each of which comprises a roof beam, a shoe, a pneumocushion and an embankment, and also a hardware compartment capsule and an advancing mechanism. Besides, the roof support section is designed with a possibility of adjustable spacing and impulse air supply into pneumocushions of the spacer elements and contains an ultrasonic generator with the wave guide transmitting ultrasound to the shoe, exciting in it the oscillations favouring to sliding of the roof support section. The embankment consists of pivotally connected sectors which are softly supported by the shoe through pneumatic shock-absorbers. The advancing mechanism contains two spacer bars with shot pins fixed on a carriage with a possibility of their movement on guides, located on lateral surfaces of the capsule of the hardware compartment using a double action pneumojack.

EFFECT: improvement of adaptability of the roof support to changes of the formation hypsometry, stabilizing the roof support section and its survival in emergencies related to rock failure.

2 dwg