External injection hydraulic acrow props can have better protection requirements.
Single hydraulic support: it is mainly composed of movable column, top cover, three-way valve, return spring, oil cylinder, handle body, piston, base body, etc.
It is suitable for inclined angle beam or smaller in 35 coal seam working face. For the coal mining face with rock burst, the adjustable props can replace the three-way valve with large flow to meet the support requirements.
