TRANSFORMABLE SECTION OF POWERED SUPPORT FROM SUPPORTING-ENCLOSING TYPE TO ENCLOSING TYPE AND VICE VERSA Russian patent published in 2012 - IPC E21D23/04 

FIELD: mining.

SUBSTANCE: section of powered support of supporting-enclosing type includes bottom, four-link chain, hydraulic props and enclosing element and supporting element, which are connected to each other. Besides, support section includes mechanical spacers located between stock of hydraulic props and supporting element, active cap with supporting element and angular telescope-type adjusting jack. Active cap has the possibility of being moved upwards by means of hydraulic cartridges, and angular adjusting jack serves for lifting of supporting element with active cap, thus providing transformation of supporting element with a cap and enclosing element to a single enclosing element.

EFFECT: higher labour efficiency due to reducing the time costs on the support installation during change-over to development of thicker or thinner formation.

4 dwg