| 摘要 |
<p>The invention relates to a hydraulic lining support (1) of the open system for tunneling and mining, comprising an outer pipe (1b) forming the upper prop (1a) and an inner pipe (6a) forming the lower prop (6), said inner pipe being introduced in the outer pipe and at the upper end (14) thereof being provided with a plunger (4). By supplying pressurized fluid, the plunger is displaced in the upper prop in a sealing manner, wherein a valve block (8) is provided on the inside of the lower prop (6) beneath the plunger (4) in order to fill the pressure chamber (13), said valve block being connected firmly to the plunger (4) by way of a pressure pipe (7) and thereby having a constant height (H) to the base plate (12) of the lining support (1).</p> |
