Anchoring method of "end bonding, full length filling" in roadway anchoring support
An anchoring method and anchoring technology, applied in the direction of earth drilling, installation of anchor rods, mining equipment, etc., can solve the problems of loose contact, poor deformation adaptability, and easy breakage of anchor rods, so as to overcome the problems of end anchoring technology and deformation Improved adaptability and improved lateral action effect
Inactive Publication Date: 2015-11-25
TAIYUAN UNIV OF TECH
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Problems solved by technology
However, the two anchoring methods currently used: "full-length anchoring" and "end anchoring" have obvious shortcomings.
Full-length anchoring makes the bolt and the rock mass as one as possible, and can give full play to the lateral reinforcement effect of the bolt, but its effect on improving the stress state of the surrounding rock surface is poor, and the deformation adaptability is poor, and it is easy to break ; The end anchorage has a good effect on improving the stress state of the surrounding rock, but because the non-anchor part of the anchor rod is not in close contact with the rock mass, the lateral effect is not good, and the non-anchor section is prone to ejection after breaking
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[0016] The present invention will be described in detail below in conjunction with specific embodiments.
[0017] The influence of anchor bolts on the mechanical properties of surrounding rock is attributed to the improvement of the cohesive force of the anchorage body and the improvement of its stress state. According to the research on the generation mechanism and distribution law of the bolt anchoring force, the degree of improvement of the stress state of the anchorage body, that is, the increase in the radial compressive stress, and the range of the rock mass where the stress state is improved depends on the anchorage form and the size of the auxiliary components. The configuration and the size of the pre-tightening force; the improvement of the cohesion of the anchor depends on the close contact between the anchor and the rock mass and the high mechanical parameters of the anchor material. The anchor bolt anchored at the end of the tray can greatly improve the stress sta...
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The invention discloses an anchoring method of 'end part binding and full-length filling' in an anchoring support in a roadway, comprising the steps of binding the end part of an anchor rod with a rock body by adopting an anchoring agent; and filling the anchor rod beyond a binding strength and the rock body with a filling material, wherein the filling material does not have dreg falling and water dropping phenomena when the anchor rod is mounted, and the mounting resistance is not obviously increased; after the anchor rod is mounted, the filling material can form a solid shape and has no obvious sticky effect with the rock body and the anchor rod; and the transverse phase acting force between the anchor rod and the rock body can be transmitted. The end part binding enables the effect of improving a surrounding rock stress state by the anchor rod to be sufficiently expressed and the transformation adaptability of a surrounding rock is improved; and a non-sticky section is filled so that the surrounding rock and the anchor rod are tightly contacted in a full-length range, therefore, the transverse effect of the anchor rod is improved and the danger of ejection due to breaking of the anchor rod is reduced.
Description
technical field [0001] The invention relates to rock mass engineering anchoring support technology, in particular to the bonding link between the anchor rod and the rock mass. It is a new anchoring method that can overcome the shortcomings of end anchorage and full-length anchorage, and can have the advantages of both anchorage methods. . Background technique [0002] Bolt support is a special form of support. It uses the strength of the bolt body and the difference in deformation properties between the bolt and the surrounding rock to form an anchorage with high strength and strong deformation adaptability within a certain range in the surrounding rock. body. The effect of bolt support on surrounding rock includes two parts: surface support and internal reinforcement. The role of surface support is to improve the stress state of the surrounding rock, so that the circumferential compressive strength of the surrounding rock is improved; The frictional resistance generated ...
Claims
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IPC IPC(8): E21D20/00
Inventor 杨双锁杨双林杨博闻牛少卿寇永嘉王志刚
Owner TAIYUAN UNIV OF TECH