Dual Station Two-leg Low-position Top Coal Caving Hydraulic Support

摘要

#$%^&*AU2012100340A420120426.pdf#####ABSTRACT The present utility model discloses a dual-station two-leg low-position top coal caving hydraulic support, comprising a base, an upper beam, a shield beam and a double-station equilibrium jack, characterized in that there are legs between the base and the upper beam, that the upper beam is hinged with the shield beam, that one end of the double-station equilibrium jack is hinged with the shield beam and the other end can be hinged with either the upper beam or the base; and that hinge points are equipped on the upper beam and the base respectively. Different structural forms can be selected according to the conditions of top coal. When the double-station equilibrium jack supports on the upper beam, it is conducive for exploitation of fully mechanized caving working face of broken top coal; when the double-station equilibrium jack supports on the base, it is conducive for exploitation of fully mechanized caving working face of complete top coal, with good adaptability to top coal.DRAWINGS . i L FIGURE I