Novel coal mine high-strength anchor rod supporting device

Abstract

The invention relates to the technical field of coal mine anchor rod supporting, and discloses a novel coal mine high-strength anchor rod supporting device. An anchor rod supporting mechanism comprises an outer anchorage rod, an inner anchorage sleeve and an outer blocking fixing assembly, the inner anchorage sleeve can be well connected with the inner wall of a drill hole through a reinforcing structure extending in the radial direction, the inner anchorage sleeve is of a circumferential expansion structure, can easily stretch into the drill hole and can carry out special grouting through a grouting device, integrated performance of the inner anchorage sleeve and the inner wall of an anchorage hole can be ensured, the reinforcing structure can stretch into the rock layer of the anchoragehole, the segmented grouting anchorage manner enables anchorage slurry to be more fully filled, the anchorage reliability can be improved, the combination force with the wall of the anchorage drill hole can be improved, anchorage effect is ensured, in addition, for the fragile portion at the connecting position of the inner anchorage sleeve and the outer anchorage rod, through the manner of arranging multiple radial fins, the connecting property of the connecting position can be effectively improved, and the supporting capacity is ensured.

Description

Technical field [0001] The invention relates to the technical field of coal mine bolt support, in particular to a new type of high-strength bolt support equipment for coal mines. Background technique [0002] At present, the general structure of bolt support equipment for coal mines on the market is relatively simple. Generally, an anchor rod similar to a steel bar is used to extend into the anchor hole for anchoring. This method has insufficient protection and support performance. After anchoring, the anchor rod and the rock formation There is no good connection force, and the two are only fastened by the expansion of grouting. This method is easy to cause the anchor rod and the grouting liquid to fall off or cracks, and it is easy to loosen, and the anchor rod cannot be axially realized. The effective anchorage in the radial and radial directions affects the supporting capacity. After encountering excessive stress and displacement of the rock formation, the anchor rod and the r...

AI Technical Summary

Problems solved by technology

[0002] At present, the bolt support equipment for coal mines on the market generally has a single structure. Generally, an anchor rod similar to a steel bar is used to extend into the anchor hole for anchoring. This method has insufficient protective support performance. After anchoring, the anchor rod and the rock formation There is no good connection force, and the two are fastened only by the expansion of the grouting. This method can easily cause the anchor rod and the grouting fluid to fall off or crack, and it is easy to loosen, and it is impossible to realize the axial direction of the anchor rod. Effective anchoring in the radial and radial directions affects the support capacity. After encountering excessive stress and displacement in the rock formation, because the anchor rod and the rock formation are not an integral structure, it is easy to cause problems such as fracture of the anchor rod and affect the support capacity. , greatly reducing the support effect of the anchor rod

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