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WO2010064096A1 - Ensembles d'emballage de coulis pour le soutènement de mine - Google Patents

Ensembles d'emballage de coulis pour le soutènement de mine Download PDF

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Publication number
WO2010064096A1
WO2010064096A1 PCT/IB2009/007299 IB2009007299W WO2010064096A1 WO 2010064096 A1 WO2010064096 A1 WO 2010064096A1 IB 2009007299 W IB2009007299 W IB 2009007299W WO 2010064096 A1 WO2010064096 A1 WO 2010064096A1
Authority
WO
WIPO (PCT)
Prior art keywords
grout
pack
bag
tension elements
grout pack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2009/007299
Other languages
English (en)
Inventor
Nils Mittet SKARBÖVIG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU2009323796A priority Critical patent/AU2009323796A1/en
Priority to US13/125,623 priority patent/US20110222970A1/en
Priority to CA2741436A priority patent/CA2741436A1/fr
Publication of WO2010064096A1 publication Critical patent/WO2010064096A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/48—Chocks or the like
    • E21D15/483—Chocks or the like made of flexible containers, e.g. inflatable, with or without reinforcement, e.g. filled with water, backfilling material or the like

Definitions

  • 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.
  • 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.
  • 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 confinrment rings or bands encircling the grout bag.
  • stope support can utilise a vast range of materials, configurations and systems, including, gum poles, timber and composite packs, steel props, unmined ore pillars, rock anchors and granular (tailings) type supports.
  • cemented grout packs are increasingly being utilized as combination support products, consisting essentially of a support column formed by cured cemented backfill or a similar cured cementitious grout, contained within a geotextile bag and stiffened against lateral deformation under axial load with an external restraining envelope of either or both of a reinforcing mesh and a series of tension rings or bands encircling the grout bag, typically both.
  • a non-yielding type of grout pack consists of a grout bag surrounded by a restraining envelope including some form of mesh reinforcement and a plurality of confinement rings encircling the mesh and bag.
  • the construction is similar except that the confinement rings or ring assemblies are able to yield under load thereby maintaining a measure of restraining force before their eventual failure.
  • the mesh is typically a reinforcement of wire or polymer netting and the confinement rings are usually made of steel wire.
  • steel wire 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.
  • a grout pack comprising a grout bag and a restraining envelope encircling the grout bag, the grout bag having flexible side walls and two ends defining, in use, a top, and a bottom and a cavity for receiving settable granular material or grout , the grout bag further having an inlet for slurry to be introduced into the interior of the grout bag and wherein the flexible side walls are adapted to retain solids within the grout bag and the grout bag has an axis in the general direction of which a filled and set grout pack is adapted to yield, the grout pack being characterised in that the restraining envelope includes multiple elongate tension elements each of which is made of a multitude of fibres twisted, braided or woven or any combination thereof to form confinement tension elements for operatively supporting the grout bag.
  • the fibres to be polymer fibres including but not limited to one or more of polypropylene, nylon, polyesters, polyethylene especially high molecular weight polyethylene, and aromatic polyamides; for the restraining envelope to include an inner mesh layer positioned on the inside of the elongate tension elements; for the elongate tension elements to assume the form of containment rings encircling the grout bag at spaced positions up the height of the grout pack in the installed condition; or, alternatively, for the elongate tension elements to extend in generally helical directions of opposite hand in the installed condition of the grout pack; and for the restraining envelope to include terminal rigid confinement rings at each of its two ends, the rigid confinement rings conveniently being of steel wire or similar relatively rigid material.
  • each tension element assumes the form of a rope that may be of a twisted construction or a braided construction.
  • the ends of a length of rope are preferably spliced together to form an endless loop.
  • the splice may be either configured to be a non-slip type of splice or it may be configured to slip under predetermined loads in order to provide for controlled yielding of an installed grout pack.
  • each tension element assumes the form of a length of webbing. In such an instance the free ends of a length of webbing may be stitched together to form an endless loop. Alternatively, the free ends of a thing of webbing may be associated with a buckle that may be arranged to provide for yielding under predetermined loads. In the event that the webbing is arranged in a criss-cross arrangement, the overlapping zones of the webbing can be stitched together.
  • the invention also provides a restraining envelope adapted to receive a grout bag in order to form a grout pack as defined above.
  • the grout packs defined above are preassembled at a factory level for transport, storage and conveyance to a site of installation in a collapsed condition with the grout pack being ready for installation and erection by securing the upper portion of the assembly against the stope hanging wall and filling the grout bag with a suitable settable material that is typically a cementitious material introduced in the form of a slurry.
  • Figure 1 is a schematic elevation of one embodiment of grout pack according to the invention in an operative position between a hanging wall and a footwall;
  • Figure 2 is a schematic plan view thereof; and, Figures 3, 4, 5, 6, 7, 8 and 9 are each a schematic elevation of a second, third, fourth, fifth, sixth, seventh and eighth embodiment of grout pack according to the invention.
  • 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 Figure 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.
  • 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.
  • 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 adapted to retain solids within the grout bag and allow water to permeate through it as may be required.
  • a similar result can be achieved in numerous different ways and utilising numerous different designs.
  • a grout pack is formed utilising the grout bag described above together with a restraining envelope comprising both an inner peripheral supporting mesh (7) conforming generally to the outer shape of the grout bag in the open condition and a series of operatively axially spaced circumferential confinement rings (8), the axis being indicated by line A-A in Figure 1.
  • each of the confinement rings (8) is formed from a synthetic polymer rope made of a multitude of polymer fibres twisted or braided together to form the rope. The free ends of a suitable cut length of rope are joined together by means of a splice indicated by numeral (9) to form an endless loop.
  • the splice can be configured in one of two different ways.
  • the splice In a first way the splice is made to be non-slipping and a permanent connection between the two ends. In such an event yielding is dependent on the stretch available in the rope and the rope will eventually break at some point that will generally not be the splice.
  • the splice is configured such that when a predetermined tension is exerted on the splice in consequence of the grout pack yielding, the splice slips to allow the containment ring to increase in size whilst still retaining effective containment of the collapsing grout pack. In such an event the confinement ring will eventually fail once the splice has slipped sufficiently to cause the splice to effectively open.
  • the confinement rings are spaced equally up the height of the grout pack in the installed condition and are arranged to extend substantially circumferentially around the grout pack.
  • the restraining envelope is devoid of any conventional mesh and comprises multiple elongate tension elements in the form of helically wound synthetic polymer ropes (10) extending in generally helical directions of opposite hand in the installed condition of the grout pack.
  • the ropes extend at about 45° to the horizontal and are themselves interlaced to form a coarse mesh with diamond shaped apertures, as illustrated in Figure 3.
  • the ropes are attached at each end to a steel wire ring (11) of generally conventional configuration at the top and bottom of the grout pack.
  • the individual ropes may include splice joints (12) made in either of the first and second ways described above.
  • the rope is replaced by tension elements in the form of interlaced helically wound webbing (15) and the steel wire rings are replaced by circumferential rings (16) of webbing to which the ends of the helically wound webbing are secured by stitching (17) at the angle of 45°.
  • the restraining envelope is devoid of any conventional restraining mesh.
  • the elongate tension elements (18) are, once more, webbing.
  • the webbing is wound in more horizontal helices that make an angle of about 22.5° with the horizontal or 67.5° with the direction of the axis of the grout pack.
  • This flatter direction in which the webbing is wound translates into tension elements that carry a higher tensile load than in the instance of the embodiment illustrated in Figure 4 with the result that the grout pack will show a stiffer response under compressive load, in use.
  • the restraining envelope has both an inner peripheral supporting mesh (20) of generally conventional design conforming to the outer shape of the grout bag in the open condition and a series of operatively axially spaced elongate tension elements in the form of spaced circumferential confinement rings (21) that in this instance are made of webbing.
  • the ends of the webbing can be stitched together as indicated by numeral (22) and at least selected confinement rings can be provided with buckles (23) that are configured to allow controlled slippage of overlapped end regions of the webbing to enable the circumference thereof to increase and provide a yielding characteristic.
  • the top and bottom rings (24) can conveniently be generally conventional steel rings, as described with reference to Figure 3. The ends of both the mesh and bag are secured to the steel rings.
  • FIG 8 the arrangement is substantially the same as that described reference to Figure 4 except that selected lengths of the helically wound webbing tension elements (30) are provided with buckles (31) that are configured to allow controlled slippage of overlapped end regions of the webbing to enable the length thereof to increase and provide a yielding characteristic under load.
  • Figure 8 illustrates the fact that two layers of webbing can be stitched together at selected points at which lengths of webbing cross each other, as indicated by numeral (32).
  • the ends of the restraining envelope are once more steel rings (33).
  • the arrangement is substantially the same apart from the fact that the webbing tension elements (35) extend at a flatter angle to the horizontal as in the case of the embodiment described with reference to Figure 5.
  • the construction of the elongate tension members can be varied widely and is not limited to any of those described above.
  • a steel ring is used, this may be a double steel ring to facilitate attachment of any mesh that may be used and any elongate tension members to it.
  • any other type of fastening of the elongate tension members to each other or to an end confinement ring may be employed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Revetment (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

L'invention concerne un ensemble d'emballage de coulis qui comprend une poche de coulis (1) et une enveloppe de contention qui entoure la poche de coulis. L'enveloppe de contention comprend plusieurs éléments tenseurs allongés (8, 10, 15, 16, 18, 21, 30, 35) composés d'une multitude de fibres emmêlées, tressées ou tissées pour former des éléments tenseurs de contention permettant d'assurer un support opérationnel de la poche de coulis. Les fibres sont de préférence des fibres polymères et comprennent une ou plusieurs des matières suivantes : polypropylène, nylon, polyesters, polyéthylène et polyamides aromatiques. L'enveloppe de contention peut comprendre une couche maillée intérieure (7, 20) positionnée à l'intérieur des éléments tenseurs allongés. Au moins certains des éléments tenseurs allongés peuvent prendre la forme d'anneaux de contention (8, 21) qui entourent la poche de coulis à des positions espacées sur la hauteur de l'ensemble d'emballage de coulis. Au moins certains éléments tenseurs allongés (10, 15, 18, 30, 35) peuvent également ou en variante s'étendre de manière généralement hélicoïdale dans des directions opposées dans la configuration installée de l'ensemble d'emballage de coulis. L'élément tenseur peut prendre la forme d'une corde (8, 10) ou d'une longueur de sangle (15, 18, 21, 30, 35). Les extrémités de la corde ou de la sangle peuvent être unies de façon à assurer un glissement contrôlé de leurs extrémités chevauchantes.
PCT/IB2009/007299 2008-12-04 2009-11-03 Ensembles d'emballage de coulis pour le soutènement de mine Ceased WO2010064096A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2009323796A AU2009323796A1 (en) 2008-12-04 2009-11-03 Mine support grout packs
US13/125,623 US20110222970A1 (en) 2008-12-04 2009-11-03 Mine support grout packs
CA2741436A CA2741436A1 (fr) 2008-12-04 2009-11-03 Ensembles d'emballage de coulis pour le soutenement de mine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200810305 2008-12-04
ZA2008/10305 2008-12-04

Publications (1)

Publication Number Publication Date
WO2010064096A1 true WO2010064096A1 (fr) 2010-06-10

Family

ID=42232929

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/007299 Ceased WO2010064096A1 (fr) 2008-12-04 2009-11-03 Ensembles d'emballage de coulis pour le soutènement de mine

Country Status (5)

Country Link
US (1) US20110222970A1 (fr)
AU (1) AU2009323796A1 (fr)
CA (1) CA2741436A1 (fr)
WO (1) WO2010064096A1 (fr)
ZA (1) ZA200907770B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130336727A1 (en) * 2012-06-14 2013-12-19 Fci Holdings Delaware, Inc. Yieldable mine roof support

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9611739B2 (en) * 2009-06-01 2017-04-04 Philip L. Lundman Inflatable tunnel seal
US8209911B2 (en) * 2009-08-27 2012-07-03 The United States Of America As Represented By The Secretary Of The Army Hydrostatically enabled structure element (HESE)
US8801338B2 (en) * 2011-11-28 2014-08-12 Micon Nested mine roof supports
US9181801B2 (en) 2011-04-21 2015-11-10 Fci Holdings Delaware, Inc. Pumpable crib
US20130121774A1 (en) * 2011-11-16 2013-05-16 DU Technologies, Inc. Crib Bag
US11053683B2 (en) * 2018-01-24 2021-07-06 Strata Products Worldwide, Llc Apparatus for controlling yield performance of props for roofs, and methods
US11702935B2 (en) 2020-09-18 2023-07-18 Fci Holdings Delaware, Inc. Pumpable crib bag
WO2023235919A1 (fr) * 2022-06-06 2023-12-14 Abc Industries, Inc. Ensemble sac berceau pompable

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999009299A1 (fr) * 1997-08-18 1999-02-25 Fosroc International Limited Support sac servant d'etai de mine
AU766110B2 (en) * 1999-04-23 2003-10-09 Industrial Netting And Mining Products (Proprietary) Limited Reinforcing structure for a support pillar
US20070231085A1 (en) * 2006-03-28 2007-10-04 Nils Mittet Skarbovig Grout pack restraining system

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US2990166A (en) * 1957-08-29 1961-06-27 Myles A Walsh Mining method
US3397260A (en) * 1967-06-26 1968-08-13 Tech Inc Const Method for encasing rigid members with concrete
US4195111A (en) * 1977-10-25 1980-03-25 Fowler Holdings Limited Load supporting means and the formation thereof
ZA859092B (fr) * 1984-12-03 1987-05-27
ES2038949A6 (es) * 1989-05-30 1993-08-01 Fosroc International Ltd Metodo de proporcionar un soporte de carga y recipiente hinchable correspondiente .
ZA956762B (en) * 1995-08-14 1996-03-20 Lin Fen Fen Mine support bag
US5823718A (en) * 1996-07-25 1998-10-20 Alnet (Proprietary) Limited Pillar bag
AU757770B2 (en) * 1998-09-03 2003-03-06 Alethea Rosalind Melanie Hall Mine support
DE10114344C1 (de) * 2001-03-23 2002-07-25 Volker Merz Stützelement für einen untertägigen Grubenraum
US20040096278A1 (en) * 2002-11-15 2004-05-20 Nampak Products Limited Provision of support in underground mine workings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999009299A1 (fr) * 1997-08-18 1999-02-25 Fosroc International Limited Support sac servant d'etai de mine
AU766110B2 (en) * 1999-04-23 2003-10-09 Industrial Netting And Mining Products (Proprietary) Limited Reinforcing structure for a support pillar
US20070231085A1 (en) * 2006-03-28 2007-10-04 Nils Mittet Skarbovig Grout pack restraining system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130336727A1 (en) * 2012-06-14 2013-12-19 Fci Holdings Delaware, Inc. Yieldable mine roof support

Also Published As

Publication number Publication date
US20110222970A1 (en) 2011-09-15
ZA200907770B (en) 2010-06-30
AU2009323796A1 (en) 2010-06-10
CA2741436A1 (fr) 2010-06-10

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