Mine support grout packs

Inactive Publication Date: 2011-09-15
SKARBOVIG NILS MITTET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]It is an object of this invention to provide a grout pack having an alternative restraining envelope tha

Problems solved by technology

Also, due to its relative rigidity, steel wire requires relatively complex production facilities for making the confinement rings.
Also, the yielding characteristics of steel wire may not be appropriate as regards the yielding behaviour of the confinement rings.

Method used

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  • Mine support grout packs
  • Mine support grout packs
  • Mine support grout packs

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0020]In the embodiment of the invention illustrated in FIGS. 1 and 2, a grout bag (1) has, in an operative inflated condition, generally cylindrical flexible side walls (2), and two end walls that form a top (3), and a bottom (4) so as to define a cavity for receiving settable granular material or grout as shown in the cut-away part of FIG. 1 and as indicated by numeral (5). A non-return inlet valve (6) is provided for the introduction of granular material or grout in the form of slurry that is to be introduced into the cavity of the grout bag, in the usual way.

[0021]The grout bag may be manufactured from a series of panels stitched together or it may be made from a tubular textile material having end panels secured thereto of the required shape defining the top and bottom.

[0022]The fabric from which the grout bag is manufactured may be any suitable fabric and, in particular, a geotextile is considered to be particularly suitable, at least for the flexible side walls that are adapt...

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PUM

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Abstract

A grout pack is provided comprising a grout bag and a restraining envelope encircling the grout bag. The restraining envelope includes multiple elongate tension elements made of a multitude of fibres twisted, braided or woven to form confinement tension elements for operatively supporting the grout bag. The restraining envelope may include an inner mesh layer positioned on the inside of the elongate tension elements which may assume the form of containment rings encircling the grout bag at spaced positions up the height of the grout pack. Alternatively, or in addition, at least some elongate tension elements may extend in generally helical directions of opposite hand in the installed condition of the grout pack. The tension element may assume the form of a rope or a length of webbing. The ends of the rope or webbing may be joined in a manner providing for controlled slipping of overlapping ends thereof.

Description

FIELD OF THE INVENTION[0001]This invention relates to mine support grout packs of the type having a grout bag that, in use, is filled with a cementitious or other settable mix, typically, but not necessarily, including pulverised ore or backfill of processed or barren mined material.[0002]The term grout bag as used herein is intended to mean a generally permeable bag that is used to contain slurry pumped into it under pressure and to retain the solids whilst allowing excess moisture to permeate through the grout bag wall that is typically made of a suitable textile material such as a geotextile material.[0003]The term grout pack as used herein is intended to mean a grout bag that is used in combination with a restraining envelope encircling the generally upright walls of the grout bag, the restraining envelope including either or both of a reinforcing mesh and a series of elongate tension elements typically in the form of confinement rings or bands encircling the grout bag.BACKGROUN...

Claims

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Application Information

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IPC IPC(8): E21D15/32
CPCE21D15/483
InventorSKARBOVIG, NILS MITTET
OwnerSKARBOVIG NILS MITTET