| 摘要 |
FIELD: rock movement investigation, particularly to determine rock movement between tubing support and mine outline to be filled with concrete. ^ SUBSTANCE: registration mark comprises distance bar having the first end fastened to mine roof and registration mark head screwed on the second end of the distance bar. Free end of registration mark head is adapted to receive leveling rod or ruler. Distance bar is arranged inside metal tubular telescopic member having outer tube. Opposite outer tube ends are secured to reinforced concrete tubing in preassembled tunnel lining collar lock. Inner tube of telescopic member is arranged inside rubber pipe installed in outer tube. The registration mark head and distance bar are provided with slots for key receiving. ^ EFFECT: possibility to determine movement of rock reinforced with tubing collars without air-tightness breakage and reinforcement technology disturbance. ^ 4 dwg |
