| 摘要 |
An adaptive frame support of mine workings consists of separate steel frames that include a bar, side and middle props and units that connect those. The support frame is equipped with reinforced bar dimension of which is elongated due to unloading cantilevers provided at both ends from place of support of side props and hinged-yielding units that consist of intermediate movable element arranged as section of special shape installed inside of the bar and is in contact with it at side surfaces, supporting eccentric rib and slat that is rigidly connected at beneath in double-tee joint with supporting eccentric rib and at above with flanges of intermediate movable arm and fixed to the bar with possibility of horizontal displacement. The hinged-yielding units connect the bar to each of side the props that in the upper part have supporting cantilevers as eccentric slats that are rigidly fixed behind the side prop and in curvilinear surface are in contact with bottom of the intermediate movable arm. Through the bottom of special shape section the side props in a single point rest on curvilinear surface of the supporting eccentric rib, and at interaction of the support with rock massif those transmit eccentrically vertical and side forces, adapt the support to displacements of rock contour of working and re-distribute load depending on manifestations of rock pressure in such way that side component of rock pressure forces against the vertical component, and vertical component forces against side pressure. |
