SUPPORT OF MINE WORKINGS Russian patent published in 1995 - IPC

FIELD: mining. SUBSTANCE: support of mine workings is a frame of double T-section with concrete laggings and spacers of low modulus material. In course of support loading, its segments are compressed due to oval holes in connecting spacers found in closed space between lagging blocks and section walls, and support frames undergo outward thrust in longitudinal and lateral directions. Such interaction of support frames and interframe guards (laggings) with enclosing rocks ensure more uniform distribution of pressure over support perimeter and along working axis that improves serviceability and stability of support. EFFECT: higher efficiency. 2 dwg