A deep roadway prestressed full anchor support construction equipment and construction method

Abstract

The invention discloses a deep roadway prestressed full anchor support construction equipment and a construction method thereof, comprising: a bolt for inserting into the anchor hole of the roadway, a sprayer for providing primary slurry and secondary slurry to the bolt, and A pressure-holding pipeline for connecting the anchor rod and the injector; the anchor hole has opposite inner and outer ends, the anchor rod is coaxially inserted into the anchor hole, and the anchor rod has an opposite first end , the second end, after the anchor rod is coaxially inserted into the anchor hole, the first end is located at the inner end, and the second end is located at the outer end; there is injection between the periphery of the anchor rod and the anchor hole Gap, the injection gap at the inner end of the anchor hole is used to inject primary grout to anchor the first end of the anchor rod, and the injection gap at other positions of the anchor hole is used to inject secondary grout to anchor the entire length of the anchor rod; use The method of layered grouting makes more than 90% of the gap in the anchor hole filled with grout, which has a high density and realizes the full-length anchoring of the anchor rod.

Description

technical field [0001] The invention relates to the technical field of roadway support, in particular to a construction equipment and a construction method for prestressed full-anchor support in a deep roadway. Background technique [0002] At present, in the support of underground roadway, the comprehensive method of anchor net, bolt and grouting is mostly used to realize the support of the roadway. The support operations include: temporary support, grouting support, etc., in the prior art , the bolt support process has the following disadvantages: [0003] 1. The traditional temporary support method generally adopts measures such as hydraulic pillars and other pillar roofs, so that the construction can be carried out. In the later stage, all the temporary supports need to be disassembled, which is a cumbersome process and consumes manpower and material resources; [0004] 2. The traditional grouting support method adopts the means of one-time grouting. Due to technical li...

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Problems solved by technology

[0003] 1. The traditional temporary support method generally adopts measures such as hydraulic props and other pillar roofs to enable the construction to proceed. In the later stage, all temporary supports need to be dismantled, and the process is cumbersome and consumes manpower and material resources;

[0004] 2. The traditional grouting support method adopts the method of one-time grouting. Due to technical limitations, it is impossible to effectively inject all the grout into the long anchor hole. The section of the anchor rod and the anchor hole is empty, and the compactness is poor. The essence is short-distance and shallow anchor injection, resulting in poor anchoring effect;

[0005] 3. In addition, the traditional grouting support method only solidifies the anchor rod and the anchor hole as a whole, but there are still sections and cracks between the broken rock around the anchor rod and the anchor hole. The traditional method of support is difficult and the physical properties of the surrounding rock are poor.

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