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Full-length anchoring supporting method with intensive resin anchor rod and anchor-shotcrete net

It is a technology of solid-intensive, sprayed anchor mesh, which is applied in the installation of bolts, earth-moving drilling, wellbore lining, etc. It can solve the problems that the supporting effect cannot meet the requirements, the mining production cannot be satisfied, and the ore body cannot be fully recovered. , to achieve the effect of preventing roadway deformation and prolonging service time

Inactive Publication Date: 2012-07-11
SHANDONG SHENGDA MINING
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Problems solved by technology

However, in some key areas where underground mine rock joints, cracks are particularly developed, rocks are very broken and service time is long, coupled with adverse effects such as ground stress and water gushing, the support effect of the existing support technology still cannot meet the requirements. It cannot satisfy the underground mining production, and some ore bodies in the underground cannot be fully recovered

Method used

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  • Full-length anchoring supporting method with intensive resin anchor rod and anchor-shotcrete net
  • Full-length anchoring supporting method with intensive resin anchor rod and anchor-shotcrete net
  • Full-length anchoring supporting method with intensive resin anchor rod and anchor-shotcrete net

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Embodiment Construction

[0027] The full-length anchoring-intensive resin bolt spraying anchor mesh support method of the present invention comprises the following steps:

[0028] A. Carry out drainage and floating operation after the roadway blasting, so that there is no pumice on the rock surface, so as to ensure the safety of the operators and the quality of the sprayed concrete in the roadway;

[0029] B. Carry out the initial 50 mm plain material spraying concrete on the roadway;

[0030] C. For the construction of the main anchor hole, use a ∮32 mm drill bit to drill the main anchor hole. The depth of the main anchor hole is 2370 mm, so that the length of the main anchor exposed from the anchor hole cannot exceed 150 mm. When constructing the main bolt hole, several rows of main bolt hole groups are drilled perpendicular to the rock wall of the roadway, such as figure 1 As shown, each row of main anchor hole groups includes nine main anchor holes 1, and is located on the same cross-section of t...

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Abstract

The invention relates to a supporting method by use of resin anchor rod and anchor-shotcrete net for roadway for special growth conditions, such as soft and broken ore rocks, fissuring and cracks. The invention aims to provide a full-length anchoring supporting method with intensive resin anchor rod and anchor-shotcrete net, which can improve the supporting effect, prolong the roadway service time and improve the recovery rate. The supporting method comprises the following steps: A) carrying out loose rock removal after explosion of roadway; B) carrying out primary 50mm simple concrete spraying to the roadway; C) drilling a plurality of rows of main anchor rod hole groups vertical to a roadway rock wall; D) installing the main anchor rods; E) netting by using reinforcing steel bars; F) installing double rib bars on the main anchor rod group; G) endowing prestressing force to the main anchor rod, wherein the prestressing force of each main anchor rod is not less than 78.4kN; H) carrying out secondary 100mm concrete spraying; I) setting a row of reinforced anchor rod hole groups between two adjacent rows of main anchor rod hole groups; J, installing the reinforced anchor rod; K) installing the double rib bars on the reinforced anchor rod groups; and L) endowing prestressing force to the reinforced anchor rod.

Description

technical field [0001] The invention relates to a roadway support method, in particular to a resin bolt-sprayed bolt-net roadway support method for soft and broken rocks, joints and cracks in special development conditions. Background technique [0002] The support methods of soft rock roadway include shrinkable metal support, anchor shotcrete support, masonry support and pressure relief support. After the combined support methods such as combined support with resin anchor rod, sprayed anchor net, etc., the support strength has been improved to a certain extent, and the service time of the roadway has been extended, that is, the length of the mining approach can reach 70-80 meters. However, in some key areas where underground mine rock joints, cracks are particularly developed, rocks are very broken and service time is long, coupled with adverse effects such as ground stress and water gushing, the support effect of the existing support technology still cannot meet the requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D21/00
Inventor 栾东朋潘尔斌李典兵鲍军涛曲炳强
Owner SHANDONG SHENGDA MINING
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