An apparatus for controllably unfolding a flexible mesh for a continuous miner, the apparatus comprising a mesh roll storage rack, a height adjustment post, a mesh rolling shaft and a flexible mesh, wherein the flexible mesh includes a mesh roll and an unfolded mesh;
- the mesh roll and the unfolded mesh are an integrated structure;
- the mesh roll is located on the mesh roll storage rack;
- the unfolded mesh is clamped on the mesh rolling shaft, and is pressed on a cut and un-supported tunnel roof via a roof bolt;
- the mesh rolling shaft is rotatably connected to a top portion of the height adjustment post;
- the mesh roll storage rack and the height adjustment post are both mounted on the continuous miner;
- the mesh rolling shaft is located at a back end of the mesh roll storage rack;
- a plurality of mesh hanging disks are fixed on an outer surface of the mesh rolling shaft;
- the unfolded mesh is clamped on the mesh hanging disks;
- a limit mechanism and a damping mechanism are disposed on the mesh rolling shaft;
- the limit mechanism comprises a limit oil cylinder, a limit slide bar and a limit gear;
- a limit cylinder body of the limit oil cylinder is fixedly connected to the height adjustment post;
- a limit piston rod of the limit oil cylinder is hinged to a bottom portion of the limit slide bar;
- the limit gear is fixed on the mesh rolling shaft, and is located above the limit slide bar;
- the limit oil cylinder is used to drive the limit slide bar to engage with a tooth space of the limit gear fixed to the mesh rolling shaft, so as to limit the mesh rolling shaft;
- the damping mechanism comprises a damping slide bar, a damping spring, a damping slide bar base, a damping disk cover and an adjustment screw plug;
- the damping slide bar base is internally provided with a penetrative cavity extending in a length direction thereof;
- the adjustment screw plug is threadedly connected to a tail of the cavity in the damping slide bar base;
- a bottom end of the damping slide bar extends into the cavity from a top portion of the damping slide bar base;
- the damping spring is located in the cavity;
- a top portion of the damping spring is in contact with the bottom end of the damping slide bar, and a bottom portion of the damping spring is in contact with a top portion of the adjustment screw plug;
- the damping disk cover is fixed on the mesh rolling shaft;
- an outer surface of the damping disk cover is provided with a plurality of arc-shaped notches distributed in a circumferential direction thereof, and the arc-shaped notches are located above the damping slide bar;
- and the damping spring is used to press the damping slide bar into the arc-shaped notches of the damping disk cover, so as to damp the mesh rolling shaft.