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Method for supporting lamellar soft rock laneway by wire rope anchors

A bolt support and wire rope technology, which is applied in the installation of bolts, earth-moving drilling, mining equipment, etc., can solve problems such as asymmetry, initial position, and aggravation of rock mass damage.

Active Publication Date: 2012-07-25
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these support forms are not particularly ideal for the support effects of the above-mentioned rock mass failure forms, and the rock mass damage increases with time, and there are obvious initial positions and asymmetry

Method used

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  • Method for supporting lamellar soft rock laneway by wire rope anchors
  • Method for supporting lamellar soft rock laneway by wire rope anchors
  • Method for supporting lamellar soft rock laneway by wire rope anchors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Test site: The test was chosen in the main vein connecting road at the footwall of the 750th line at the level of 1621 in the west. This section is mainly composed of relatively loose quartz horn-porphyritic tuff. There is less fissure water in the rock formation and relatively developed small joints. Group: ①32°∠26°②90°∠85°③240°∠44°~60°, but the extension is not large, most of them are closed, and the lamellae are well developed. Chipping occurrence: 210°∠60°, low surface strength, can fall off by hand. The upper part of the 1645 level and 1633 level is supported by a single threaded steel bolt, which fails to effectively prevent the rock flakes and top blocks from falling. In addition to the impact of later mining, the damage to the roadway is more serious, and some bolts are exposed outside the hole. Resulting in part of the amount of ore can not be recovered. Accordingly, it has been demonstrated that steel wire rope bolts are used for support.

[0039] 2) Anch...

Embodiment 2

[0045] Use a rock drill to drill anchor holes with a diameter of 40mm and a depth of 1500mm on the layered rock mass. The distance between two adjacent anchor holes is 700mm; by weight percentage, take 65% of cement, 25% of white cement, and naphthalene It is 3% water reducer and 7% gypsum; stir the components evenly, put them into a packaging bag made of long-fiber water filter paper with a size of Φ30mm×230mm, and sew the packaging bag into a cylindrical shape with thread , to make a cement binder roll body; after immersing the cement binder roll body in clean water for 60s, send it into the drilled anchor hole; in order to ensure that the anchor rod and the steel wire rope net are connected as a whole, take a length of 3200mm Insert the steel wire rope anchor into the anchor hole of the cement binder roll, insert the steel wire rope anchor to the bottom of the anchor hole, the length of the steel wire anchor left outside the anchor hole is 1700mm; Fix the bolt holes of the ...

Embodiment 3

[0047] Use a rock drill to drill anchor holes with a diameter of 40mm and a depth of 1800mm on the layered rock mass. The distance between two adjacent anchor holes is 1000mm; by weight percentage, take 75% of cement, 18% of white cement, and naphthalene It is 2% water reducer and 5% gypsum; stir the components evenly, put them into a packaging bag made of long-fiber water filter paper with a size of Φ32mm×230mm, and sew the packaging bag into a cylindrical shape with thread , to make a cement binder roll; after immersing the cement binder roll in clean water for 90s, send it into the drilled anchor hole; Insert the wire rope anchor into the anchor hole of the cement binder roll, insert the wire rope anchor to the bottom of the anchor hole, the length of the wire rope anchor left outside the anchor hole is 1200mm; for inserting the wire rope anchor Fix the bolt holes of the rods so that the wire rope bolts overlap along the direction of the roadway and are hinged together with...

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Abstract

The invention discloses a method for supporting a lamellar soft rock laneway by wire rope anchors. The method comprises drilling a plurality of anchor holes in the lamellar rock, controlling the distance between two adjacent anchor holes to be in the range of 700-1,000mm; uniformly mixing cement, white cement, water reducer and gypsum according to weight percentages, feeding into packaging bags, and forming cement rolls; immersing the cement rolls into water, and then feeding into the anchor holes; inserting the wire rope anchors into each anchor hole; and fixing the openings of the anchor holes, jointing the anchors in the direction of the laneway, and hinging the anchors by rope clips, so as to support the lamellar soft rock laneway. According to the method provided by the invention, the supporting structures are closely combined with the surrounding rock, not only the free deformation and the loose damage of the surrounding rock are avoided, but also the structure can adapt to certain deformation of the surrounding rock so that the deformation pressure on the supporting structures is not too high, and the inclined lamellar weak tuff is reinforced effectively, so that a new method is provided for supporting the weak lamellar soft rock laneway.

Description

Technical field [0001] The present invention belongs to the field of local and mines, involving a method of constructing the support of the lane lanes in the tilt layer of weak rock body, which involves a method of a steel wire -like soft rock lane lane. Background technique [0002] The results of the geological survey of a copper mines.The tilted layer of weak and condensed tomb, the destruction characteristics presented from the lane can see that it is neither damaged by the block of the hard rock nor the overall deformation of the soft rock, but the destruction characteristics unique to the layered rock body.At present, the types of anchor rods used for ground -stamped lane channels are: tube seam anchor support, wedge tube anchor support, and threaded steel anchor support.However, the support effects of these support forms of the above -mentioned rock body destruction are not particularly ideal. The rock body destruction has increased with time, and it has obvious initial po...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D20/00
Inventor 焦满岱陈小平刘武团雷明礼刘沈宁洪艳霞
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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