An anti-breakage anchorage device and its construction method adapted to the surrounding rock of large-deformation roadway

Abstract

The invention discloses a breaking-resistant anchoring apparatus suitable for large-deformation roadway surrounding rock and a construction method of the breaking-resistant anchoring apparatus. The breaking-resistant anchoring apparatus comprises an anchor rod and a plurality of anchor ropes; a plurality of grooves are formed in the side wall of the rear end of the anchor rod, and the rear ends of the anchor ropes are embedded inside the corresponding grooves; a nut, a base plate and a supporting plate are arranged at the position, adjacent to the rear end, of the anchor rod, the nut is arranged adjacent to the rear end of the anchor rod, and the base plate is disposed between the supporting plate and the nut; a plurality of anchor rope through holes are respectively formed in the base plate and the supporting plate, and the anchor ropes are fixed in the anchor rope through holes of the base plate by virtue of anchorage devices; and a retainer ring is arranged at the front end of the anchor rod, a plurality of anchor rope through holes are formed in the retainer ring, the front end of each anchor rope penetrates through the anchor rope through hole, a clamp is arranged in each anchor rope through hole, and the front end of each anchor rope is fixed by virtue of the clamp; and a part, disposed between the supporting plate and the retainer ring, of the anchor rope is wound at the outer side of the anchor rod. The breaking-resistant anchoring apparatus is simple in structure, convenient to install, and low in supporting cost; and the elongation percentage is large, the deformation of the roadway surrounding rock can be effectively controlled, and the long-term stability and normal use of the roadway surrounding rock can be ensured.

Description

technical field [0001] The invention belongs to the technical field of large-deformation roadway surrounding rock control, in particular to an anti-breakage anchorage device and a construction method suitable for large-deformation roadway surrounding rock. Background technique [0002] With the continuous increase in the demand for coal resources and the continuous development of mining technology, many domestic coal mines have entered into deep resource mining one after another. Due to factors such as large mining depth and high ground stress, the complicated support conditions have become unavoidable for the development of coal mine roadway support. neglected issues. Bolt support is an active support form. Compared with other support methods, it has the advantages of simple support process, remarkable support effect, low support cost, and convenient transportation and construction. in a pivotal position. The application of anchor cable support technology is also very com...

AI Technical Summary

Problems solved by technology

[0003] However, due to the high ground stress and large amount of deformation in the deep roadway, especially in the high-stress soft rock roadway, the deterioration of the geological environment, the mining stress and the structural stress have increased significantly, and the roadway roof caving, slab and floor heaving phenomenon emerge in endlessly, often Because of its large amount of deformation and long duration, large areas of primary support bolts are broken

At the same time, due to the low elongation of the prestressed anchor cable, it can neither match the mechanical properties of ordinary anchor rods nor adapt to the large deformation characteristics of the roof, and it is easy to cause the anchor cable body to break in the support roadway with large deformation fail

Therefore, multiple maintenance and repairs are often required when working in deep large deformation roadways, which not only greatly increases the cost of support, but also increases hidden dangers to mine safety production, which has a great impact on mine economic benefits

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