A bolt assembly for coal mine support

Abstract

The invention discloses an anchor rod assembly for supporting coal mines. An anchor rod sleeve comprises an anchor rod sleeve section I, an anchor rod sleeve section II and an anchor rod sleeve section III which are integrally arranged, wherein a plurality of axial through slots are formed in the anchor rod sleeve section I along the axial direction of the anchor rod sleeve section I, and a plurality of radial round slots are formed in the anchor rod sleeve section II along the radial direction of the anchor rod sleeve section II; and an anchor rod comprises an anchor rod body, an inner anchorrod fixing section and an inner anchor rod clamping section which are integrally arranged, the inner end of the anchor rod body is connected with the inner anchor rod clamping section through the inner anchor rod fixing section, and the inner anchor rod fixing section is provided with an extension strip slot along the axial direction of the inner anchor rod fixing section. According to the anchorrod assembly, the slots in the anchor rod sleeve section I and the anchor rod sleeve section II can be well filled with solidifying slurry, so that the anchoring stability of the anchor rod sleeve isimproved, and the radial and longitudinal anchoring forces of the anchor rod sleeve are guaranteed; and meanwhile, the inner anchor rod fixing section and the inner anchor rod clamping section are arranged at the inner end of the anchor rod, the steadiness of the anchor rod can be further guaranteed, and the loosening of the anchor rod after anchoring can be prevented; and the anchor rod assemblyis reliable in structure, and the supporting safety of the coal mines can be effectively enhanced.

Description

technical field [0001] The invention relates to a bolt assembly for coal mine support, which belongs to the technical field of coal mine support. Background technique [0002] At present, in coal mining, it is generally necessary to use bolts for support. The bolt is the most basic part of roadway support in contemporary coal mines. It reinforces the surrounding rock of the roadway so that the surrounding rock can support itself. Now anchor rods are not only used in mines, but also in engineering technology for main body reinforcement of slopes, tunnels and dams. As a tensile member that goes deep into the ground, the bolt is connected to the engineering structure at one end, and the other end goes deep into the ground. The whole bolt is divided into a free section and an anchor section. area, whose function is to apply prestress to the anchor. Current anchors include the following: [0003] (1) Wooden anchor rod. There are two types of wood anchors used in our country,...

AI Technical Summary

Problems solved by technology

[0010] The above various anchors have their own advantages and disadvantages in coal mine support. However, although the above various anchors are relatively simple in anchoring, the anchoring force is small, and the anchoring reliability is difficult to guarantee, especially for soft rocks and other occasions. , it is easy to loosen after anchoring, and it is difficult to achieve a good anchoring effect

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