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Method for supporting lamellar soft rock laneway by wire rope anchors

A technology of bolt support and steel wire rope, which is used in the installation of bolts, earth-moving drilling, mining equipment, etc., can solve the problems of aggravated rock mass damage, unsatisfactory support effect, initial position and other problems

Active Publication Date: 2014-08-20
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 layered soft rock roadway with steel wire bolts. Bolt holes are drilled on the layered rock mass, and the distance between two adjacent bolt holes is controlled to be 700-1000 mm; by weight percentage , mix cement, white cement, water reducer and gypsum evenly, put them in a packaging bag to make a cement binder roll; soak the cement binder roll in water, and send it into the anchor hole; Insert the wire rope anchor into the anchor hole; and fix the anchor hole opening so that the anchor overlaps along the direction of the roadway and is hinged together with rope clips to complete the support of the layered soft rock roadway. The method of the invention closely combines the support structure with the surrounding rock, which can not only limit the free development of the deformation of the surrounding rock, prevent the surrounding rock from being loose and damaged, but also adapt to the proper deformation of the surrounding rock, so that the deformation pressure acting on the support structure will not be too large. The effective reinforcement of inclined layered weak tuff provides a new method for roadway support in weak layered rock mass.

Description

technical field [0001] The invention belongs to the technical field of geology and mines, and relates to a method for supporting roadways along veins in inclined layered weak rock mass, in particular to a method for supporting layered soft rock roadways with steel wire bolts. Background technique [0002] The engineering geological survey results of a copper mine stope show that the rock mass along the vein roadway belongs to the quartz hornporphyry tuff of the Middle Cambrian volcanic rock series. The inclined layered weak tuff, from the damage characteristics in the roadway, can be seen that it is neither the block failure of hard rock nor the overall deformation failure of soft rock, but the unique failure characteristics of layered rock mass. At present, the bolt support forms adopted for roadways damaged by ground pressure include: pipe seam bolt support, wedge pipe bolt support, and threaded steel bolt support. However, these support forms are not particularly ideal f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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