| 摘要 |
The invention relates to face equipment for mechanical extraction in longwall mining, in particular in underground coal mining, comprising a face conveyor (17) which is arranged along the mining wall, extraction means (18) which can be moved along the face conveyor (17), and shield support frames (10) supported on the face conveyor (17) at an angle thereto. The invention is characterized in that a hose level (21) which comprises a liquid-filled hose (22) is placed in the region of the face conveyor (17) on individual support frames (10), said hose level (21) being placed between the face conveyor (17) and at least one main component of the shield support frame (10), in order to ascertain the height of the face opening, and a pressure sensor (23, 24, 28) is placed at at least one end of the hose (22). In addition to taking into consideration a longitudinal and/or transverse inclination of the face conveyor (17) and of the main component of the shield support frame (10) when ascertaining the face height, the face conveyor (17) and the shield support frame (10) main component which has the hose-level end are each equipped with an inclination measuring arrangement (25, 26) which allows the measurement of at least two tilting axes towards the horizontal, and the pressure sensor (23, 24, 28) and the inclination measuring arrangements (25, 26) are connected to an analyzing and control unit. |
