FIELD: mining.
SUBSTANCE: invention relates to mining, namely to sections of powered supports. The invention proposes a roof support of the main entry, which has two spaced sides, each of which includes a rear base interacting with soil, a hydraulically controlled rear support column connected to the above rear base, a rear shield, a rear connection that attaches the above rear shield in a hinged way to the above said rear base interacting with soil, a middle base interacting with soil and connected to the above said rear base, a hydraulically controlled middle support column connected to the above said middle base, the front base interacting with soil and connected to the above said middle base, and a hydraulically controlled front support column connected to the above said front base. Besides, the roof support includes a rear beam interacting with the roof and hinged to the rear shield, a middle beam interacting with the roof and hinged to the above said rear beam, and the front beam interacting with the roof and hinged to the middle beam interacting with the roof. With that, the above said rear support columns are connected between the above said rear bases and the specified rear beam; the above said middle support columns are connected between the above said middle bases and the above said middle beam, and the above said front support columns are connected between the above said front bases and the above said front beam. A rear connection strip is hinged to each of the above said rear bases interacting with soil; a middle connection strip is hinged to each of the above said middle bases interacting with soil, and the front connection strip is hinged to each of the above said front bases interacting with soil.
EFFECT: improvement of operation of a powered support, namely improvement of stability and provision of constant contact to roof of mining under conditions of variation of mining area relief.
9 cl, 17 dwg
