| 摘要 |
<p>Face equipment for mechanical extraction in longwall mining, in particular in underground coal mining, having a face conveyor arranged along the mine face, having an extraction means which can be displaced along the face conveyor, and having shield‑support units attached to the face conveyor at an angle thereto, is characterized in that, for the purpose of determining the absolute height position of predetermined elements of the face equipment, a liquid‑filled hydrostatic tube balance (17) is installed along the mine face (10), on the selected elements (12, 15, 31) of the face equipment, and is connected to a base station (19), which has its height determined precisely as a reference point and is arranged in one of the counter heads (13, 14), wherein, distributed between individual elements (12, 15, 31) of the face equipment over the course of the face equipment, pressure sensors (22) are linked into the tube conduit (18, 23, 24) of the hydrostatic tube balance (17) and are connected to a central evaluation and control unit.</p> |
