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Resin bolting ejector anchor net roadway support method

A technology of roadway support and spray anchor net, which is applied to the installation of bolts, earthwork drilling, mining equipment, etc., can solve the problems that the ore body cannot be recovered and cannot meet the mining production, so as to prevent the deformation of the roadway and prolong the service time Effect

Inactive Publication Date: 2013-01-02
SHANDONG SHENGDA MINING
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, due to the abnormal fragmentation of underground ore rocks, coupled with the adverse effects of ground stress and water gushing, the existing support technology is far from meeting the needs of underground mining production, and some ore bodies in the underground cannot be fully recovered.

Method used

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  • Resin bolting ejector anchor net roadway support method
  • Resin bolting ejector anchor net roadway support method
  • Resin bolting ejector anchor net roadway support method

Examples

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Embodiment Construction

[0025] The present invention relates to a roadway supporting method with resin anchor bolt sprayed with anchor mesh, comprising the following steps:

[0026] 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;

[0027] B. Carry out the initial 50 mm plain material spraying concrete on the roadway;

[0028] C. For the construction of the anchor hole, use a ∮32 mm drill bit for drilling the anchor hole. The depth of the anchor hole is 2370 mm, and the length of the anchor rod exposed to the anchor hole cannot exceed 150 mm. When constructing bolt holes, several rows of bolt hole groups are drilled perpendicular to the rock wall of the roadway, such as figure 1 As shown, each row of anchor hole groups includes eight anchor holes 1, and is located on the same cross-section of the roadway 2, two anchor holes 1 are ...

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Abstract

The invention relates to a resin bolting ejector anchor net roadway support method used under a mellow and crush ore rock situation. The resin bolting ejector anchor net roadway support method can improve support effect, prolong roadway service life and improve recovery rate. The resin bolting ejector anchor net roadway support method comprises the following steps of A conducting flotation discharge operation after roadway blasting; B conducting first 50-millimetre plain material shotcrete on a roadway; C drilling a plurality of rows of anchor rod hole groups in a mode vertical to a rock wall of the roadway; D installing resin bolts and using two resin medicine rolls; E adopting reinforcing steel bars for netting; F sequentially installing double-fillets from one end to the other end of a same row of anchor rods; G exerting prestressing force on the anchor rods, enabling the prestressing force on each anchor rod to be no less than 78.4KN; and H conducting secondary shotcrete with a shotcrete thickness of 100 millimeters.

Description

technical field [0001] The invention relates to a roadway support method, in particular to a roadway support method using resin bolts sprayed with anchor nets for soft and broken rocks. 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, due to the abnormal fragmentation of underground ore rocks, coupled with adverse effects such as ground stress and water gushing, the existing support technology is far from meeting the needs of underground mining production, and some ore bodies in the underground cannot be fully recovered. Contents of the invention [000...

Claims

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Application Information

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