Yield anchor cable spherical rotating and aligning device

Abstract

The invention discloses a yield anchor cable spherical rotating and aligning device which is characterized by comprising a semi-spherical tray, an anchorage device ring, an anchorage device clamping sheet and a ball center roller. The semi-spherical tray comprises a tray main body which is approximate to a hollow semi-spherical shape; an annular flat bottom face which is in contact with a tunnel wall surface is arranged on the rim of the tray main body; the wall thickness of the tray main body is gradually increased from the edge to the center; a spherical groove is arranged at the center of the tray main body; the ball center roller is arranged inside the spherical groove, and rotates inside the spherical groove; the ball center roller is provided with a columnar axis hole; the anchorage device ring is located at the outer side of the center of the tray main body; the anchorage device ring is in contact with the tray main body, and the inner port part of the anchorage device ring can adapt to the outer wall face of the tray main body, so that the anchorage device ring can move in a sliding manner; and the anchorage device clamping sheet is matched with the outer end opening of the anchorage device ring, so that an anchor cable is fixedly arranged on the anchorage device ring by passing through the axis hole of the ball center roller and the inner ring opening of the anchorage device ring. By utilizing the yield anchor cable spherical rotating and aligning device provided by the invention, the anchor cable support with different mounting angles under high-strain stress can be solved.

Description

technical field [0001] The invention relates to a spherical rotating centering device for support of mine roadway and tunnel engineering, and is particularly suitable for the support of surrounding rocks where unevenness occurs in the later support at the angle between the roof and the bottom plate and two sides. Background technique [0002] For roadways with broken surrounding rocks, roadways affected by strong dynamic pressure and risk of roof fall, blindly pursuing high-strength and high-rigidity support materials to achieve surrounding rock support is useless and unrealistic. At present, the support materials used in roadway support have paid attention to the transfer and release of ground stress, especially the use of prestressed anchor cables, which consider the mechanical properties of anchor cables, have high bearing capacity, can apply higher prestress, and anchor It has the characteristics of large depth and remarkable yielding effect, and the high prestress can r...

AI Technical Summary

Problems solved by technology

[0003] The currently used prestressed anchor cable support system is only comprehensively analyzed from the material and mechanical properties of the anchor cable body. The currently used cable body once achieved the expected effect of large tonnage and strength. The following problems still exist in the surrounding rock support of prestressed anchor cables: (1) The deformation of the surrounding rock has a time effect. , the deformation of the surrounding rock cannot be controlled; (2) Due to the unevenness of the surface of the surrounding rock at the construction site, the anchor cable tray cannot be flush with the surface of the surrounding rock, causing the anchor cable body to bend and bear a large partial load, resulting in anchor cable tension and The loss of prestress during the locking process, and the unbalanced load of the pallet is large, which seriously affects the effect of anchor cable support; (3) For the anchor cable support at the angle between the roof and the bottom plate and the two sides, the pretension force is low, and ordinary prestress The anchor cable cannot be adapted and cannot meet the use requirements of different anchor cable installation angles; (4) In the surrounding rock of the roadway where the ground stress is large, the mechanical properties of ordinary pallets are poor, the periphery of the pallet is warped, the load capacity of the pallet is reduced, and even the phenomenon of pallet pull-through occurs ; (5) The pallet has a low bearing capacity, the gradual pressure yield is not obvious, the cushioning effect is poor when the pressure is high, the pallet is easily damaged, and does not match the high-strength anchor cable; It is not applicable to the anchor cable support at the angle between the roof and the bottom plate and the two sides and the surrounding rock support with uneven surface of the roadway; (7) The anchor cable body and the anchorage locking point are not in a line caused by the deformation of the surrounding rock The additional eccentric load caused by the above cannot be solved well, resulting in the difficulty or loss of the pre-tightening force of the anchor cable, causing the anchor cable to fail

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