Broken coal roadway reinforced anchoring type yielding grouting anchor rod anchoring device and using method thereof

Abstract

The invention discloses a broken coal roadway reinforced anchoring type yielding grouting anchor rod anchoring device and a using method thereof, and belongs to the technical field of underground engineering supporting. The broken coal roadway reinforced anchoring type yielding grouting anchor rod anchoring device comprises an elastic yielding assembly, a plastic yielding assembly and a reinforced anchoring structure, wherein the elastic yielding assembly is composed of a metal tray, positioning rods, annular vulcanized rubber air bags, metal isolation pieces and a limiting plate; the plastic yielding assembly is composed of a porous metal disc, a necking round rod and a high-strength porous extrusion plate; and the reinforced anchoring structure is composed of a hollow grouting anchor rod, a resistance increasing pawl sleeve and the like. The hollow grouting anchor rod and the resistance increasing pawl sleeve can effectively improve the anchoring strength and improve the mechanical property of the coal and rock mass, and when the coal and rock mass deforms, through coordinated work of the elastic yielding assembly and the plastic yielding assembly, good large-deformation yielding work efficiency is achieved, the anchor rod is effectively prevented from being broken due to overload, and the stability and the use safety of the coal rock mass and the supporting structure are maintained, the supporting requirement of the deep high-stress broken coal roadway is met, and the anchor rod anchoring device has the advantages of high anchoring strength, constant-resistance yielding, reasonable structure and the like.

Description

technical field [0001] The invention relates to the field of underground engineering support, in particular to an enhanced anchorage-type yielding grouting bolt anchorage device and a method thereof which are suitable for deep large-deformation broken coal roadways. Background technique [0002] In recent years, as the mining depth of coal mines, metals and other mineral resources has been continuously increased, the mining environment and geological conditions are becoming more and more complex and changeable. The support of deep high-stress coal roadways is difficult, and the surrounding rock is still unstable after repeated repairs, which poses a huge threat to construction personnel and production equipment. It is an urgent technical problem to be solved for the safe and efficient development of deep coal mine resources in my country. [0003] As an effective support form commonly used in surrounding rock control, bolt has been widely used in the field of underground engi...

AI Technical Summary

Problems solved by technology

However, on the one hand, the above-mentioned pressure-yielding deformation anchoring device has its own design defects, such as the combination of anchor rod and anchor cable and segmental design, and the pressure-yielding device is used as a connecting piece, without considering whether the connection strength is sufficient. There are defects in the design of the structural strength, and the adopted form of yielding is relatively simple, resulting in poor yielding deformation effect of the designed device, and it is difficult to meet the yielding requirements of deep large deformation tunnels; on the other hand, the existing yielding deformation The anchoring device does not fully consider the problem of insufficient anchoring strength in the use of broken coal roadways, and does not overcome the problem of de-anchoring of the anchorage device due to compression deformation, so it is not suitable for deep broken coal roadway support

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