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Composite anchor net used to control deep well high stress soft rock roadway bottom and construction method of the composite anchor net

A construction method and roadway technology, applied in the field of composite anchor nets, can solve problems such as difficulty in controlling the bottom of deep well and high-stress soft rock roadway, unable to support the surrounding rock of the roadway, etc., so as to improve the performance of strong support and reduce disturbance. , The effect of strong pressure resistance

Active Publication Date: 2018-12-28
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For example, the patent application with the application number: 201210472254.4 discloses a kind of anchor injection process for the treatment of the bottom of the roadway, that is, the combination of shallow, middle and deep layers of grouting is used to realize the treatment of the bottom of the roadway. For the case where the depth of the roadway is not deep, the above-mentioned anchoring process can effectively support the surrounding rock of the roadway. When the roadway is deep and the surrounding rock is soft, the stress on the surrounding rock of the roadway is relatively high , in the above case where the bolt is only installed separately in the surrounding rock of the roadway, it cannot provide effective support for the surrounding rock of the roadway, and it is difficult to control the bottom of the roadway in deep wells with high stress and soft rock

Method used

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  • Composite anchor net used to control deep well high stress soft rock roadway bottom and construction method of the composite anchor net
  • Composite anchor net used to control deep well high stress soft rock roadway bottom and construction method of the composite anchor net
  • Composite anchor net used to control deep well high stress soft rock roadway bottom and construction method of the composite anchor net

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Experimental program
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specific Embodiment 1

[0041] Specific embodiment one, construction method comprises the steps:

[0042] A), according to the design size of the roadway 10 section, over-excavate the roadway floor to a depth of 150-200mm;

[0043] B), arrange described steel band 20 on the roadway bottom plate after over-excavation, make the length of steel band 20 arrange along the width direction of roadway 10, and steel band 20 is arranged at intervals along the length direction of roadway 10;

[0044] C), the anchor rod 30 is set on the steel band 20, and the anchor rod 30 is anchored in the surrounding rock of the roadway 10, and the steel band 20 is fixed on the roadway floor by the anchor rod 30, on the said anchor rod 30 The first tray 31 and the first nut 32 are respectively arranged on the top, the first tray 31 is attached to the upper surface of the steel belt 20, and the steel belt 20 is fixed on the roadway floor by the first nut 32;

[0045] D), subsequently laying described first reinforcing mesh 40...

Embodiment 2

[0061] Excavate the depth of 200mm on the bottom plate of the roadway 10, the width of the steel strip 20 is 50mm, the thickness is 10mm, the length is still 5000mm according to the width of the roadway 10, the row spacing is 2000mm, the diameter of the anchor rod 30 is 25mm, and the length is 1800mm. Steel belt 20 rows are identical still to be 2000mm, and the width of steel bar 40 is 1000mm, and length is 5000mm, and steel bar diameter is 22mm, and the width of polyester fiber net 50 is 1000mm, and length is 5000mm, and the width of polyester filament is 15mm.

[0062] All the other construction methods and steps are the same as in Embodiment 1.

Embodiment 3

[0064] Excavate the depth of 200mm on the bottom plate of roadway 10, the width of steel strip 20 is 40mm, the thickness is 8mm, the length is still 5000mm according to the width of roadway 10, the row spacing is 1500mm, the diameter of anchor rod 30 is 20mm, and the length is 1600mm. Steel belt 20 row spacings are the same as 1500mm, the width of the first reinforcement mesh 40 is 1000mm, the length is 5000mm, the steel bar diameter is 20mm, the width of polyester fiber mesh 50 is 1000mm, the length is 5000mm, and the width of polyester fiber filament is 15mm .

[0065] All the other construction methods and steps are the same as in Embodiment 1.

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Abstract

The invention relates to a compound anchor net for treating a deep-well high-stress soft rock roadway floor heave. Steel belts are arranged on roadway base plates of a roadway, the length of the steel belts is arranged in the width direction of the roadway, multiple steel belts are arranged in the length direction of the roadway at intervals, a first steel bar net, a polyester fiber net and a second steel bar net are arranged in the height direction of the roadway base plates at intervals, anchor rods are arranged on the roadway base plates and sequentially penetrate through the second steel bar net, the polyester fiber net, the first steel bar net and the steel belts and are fixed to the surrounding rock where the roadway base plates are located, the outside of the compound anchor net is cast with concrete, a concrete layer is formed through solidification, the anchor rods, the steel belts, the first steel bar net, the second steel bar net and the concrete perform primary powerful supporting, a part of roadway base plate surrounding rock pressure can be released, the polyester fiber net, the steel belts, the first steel bar net, the second steel bar net and the concrete perform secondary powerful supporting, and the base plates are uniform in confining pressure and are distributed in a whole supporting system. In addition, the steel belts effectively decrease the disturbance of the roadway base plate confining pressure to the anchor rods.

Description

technical field [0001] The invention relates to the technical field of roadway support, in particular to a composite anchor net used for controlling bottom sag of a deep well high-stress soft rock roadway and a construction method of the composite anchor net. Background technique [0002] As the depth of mine mining continues to increase, the problem of high-stress soft rock roadways in deep mines has become more and more prominent. The support and stability control of soft rock roadways have received widespread attention. The influence of mining causes the stress state of the surrounding rock to change and the nature of the surrounding rock changes during the maintenance process, which makes the roof, floor and two sides of the rock mass deform and move into the roadway, and the floor bulges upwards, which seriously affects the normal safety production work , has gradually become the main form of deformation and failure of soft rock roadway. [0003] In the prior art, ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21D11/15E21D20/00
CPCE21D11/10E21D11/107E21D11/152E21D20/00
Inventor 姚韦靖黄金坤庞建勇张金松
Owner ANHUI UNIV OF SCI & TECH