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Rock anchor rod capable of conducting segmented anchoring

A rock bolt and anchoring technology, which is used in the installation of bolts, mining equipment, and earth-moving drilling, etc., can solve the problems of small longitudinal deformation of the bolt, failure of tensile failure, and inability to cope with rock deformation, so as to improve the anchoring force. Effect

Inactive Publication Date: 2014-09-24
POWERCHINA ZHONGNAN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of huge rock mass stress, the bolt cannot withstand excessive load, resulting in excessive deformation and failure
In addition, the traditional anchor bolts are in the form of two-point anchorage, the longitudinal deformation of the anchor bolt is very small, and it cannot cope with large rock deformation

Method used

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  • Rock anchor rod capable of conducting segmented anchoring
  • Rock anchor rod capable of conducting segmented anchoring
  • Rock anchor rod capable of conducting segmented anchoring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] A rock bolt anchored in sections, combined with Figure 1 to Figure 3 , including an anchor rod body 1, an external thread 2, a bottom nut 3, a backing plate 4, and several anchor bolts 5 arranged on the anchor rod body. The above-mentioned bolt body is a solid smooth steel bar. The above-mentioned anchor bolts are arranged on the anchor rod body, and the number and spacing thereof can be freely set as required. The deformable segment of the anchor is coated with a chemical coating or grease that prevents the rod and grouting material from sticking together. In field application, the bolt body adopts the form of segmental anchoring, and the borehole is filled with grouting material. Due to the addition of anchor bolts, the anchor rod can produce greater deformation under high stress to improve the anchoring force without damage.

[0025] The above-mentioned embodiments should be understood that these embodiments are only used to illustrate the present invention more ...

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PUM

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Abstract

The invention discloses a rock anchor rod capable of conducting segmented anchoring. In rock mass which is high in crustal stress and in joint fissure development, an anchor rod loses efficacy on the whole due to the rock burst effect or large rock deformation, and the rock mass collapses due to loss of the supporting effect. The rock anchor rod capable of conducting segmented anchoring comprises a rod body, multiple sections of external threads are arranged on the rod body, at least one bottom nut is connected to the tail of the rod body in a threaded mode, and a plurality of anchoring bolts used for being placed in different jointed rock mass are connected to the other threaded sections of the rod body in a threaded mode. Under the effect of surrounding rock loads, the anchor rod can generate certain deformation and meanwhile, the anchor rod cannot be damaged.

Description

technical field [0001] The invention relates to a section anchored rock bolt, in particular to a rock bolt used for providing top and side wall support and preventing rock collapse in underground engineering such as tunnels and underground caverns. Background technique [0002] In geotechnical engineering involving deep rock mass excavation, such as underground engineering and mining engineering, in order to prevent the formation from deforming, collapsing or destabilizing and endangering safety, a major supporting technology for strengthening the formation is bolt reinforcement. The formation is reinforced through the high-strength tensile capacity of the anchor installed in the formation, and the dense combination between the anchor and the grouting body around the anchor and the formation. [0003] With the continuous deepening of mining depth, the increase of ground stress and the deterioration of geological conditions make support more difficult, so the anchoring force ...

Claims

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Application Information

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IPC IPC(8): E21D21/00
Inventor 涂鹏冯树荣吴文平胡育林张国祥
Owner POWERCHINA ZHONGNAN ENG