A pillar for underground mining operation face roof struts

The utility model discloses a pillar for underground mining operation face roof struts, including the cylinder, the cylinder bottom is stretched into in the base, cylinder bottom both sides all are equipped with the roof, two roof bottom both sides all are equipped with the head rod, two the head rod all is alternately form and center department all through the connection of first rotational pin,two the head rod bottom is fixed respectively in bottom plate top both sides, two bottom plate bottom both sides are all fixed in the base through the inserted block, cylinder bottom middle part is equipped with the supporting shoe, be equipped with the recess in the supporting shoe, be equipped with the backup pad in the recess, the backup pad bottom is equipped with the round bar, the round barruns through recess and connecting plate fixed connection, the groove end mouth is equipped with the sliding block, the sliding block cover is established on the round bar and the bottom is equipped with first spring. The util