US20140363241A1 - Pumpable Crib - Google Patents
Pumpable Crib Download PDFInfo
- Publication number
- US20140363241A1 US20140363241A1 US14/444,202 US201414444202A US2014363241A1 US 20140363241 A1 US20140363241 A1 US 20140363241A1 US 201414444202 A US201414444202 A US 201414444202A US 2014363241 A1 US2014363241 A1 US 2014363241A1
- Authority
- US
- United States
- Prior art keywords
- containment bag
- reinforcing layer
- assembly
- bag
- containment
- 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.)
- Abandoned
Links
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 37
- -1 polyethylene Polymers 0.000 claims description 14
- 239000004698 Polyethylene Substances 0.000 claims description 13
- 229920000573 polyethylene Polymers 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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 is related to a method and apparatus for supporting a mine opening and, more particularly, to a pumpable crib and a method for installing a pumpable crib used to support a mine opening.
- Cribbing is frequently used to provide support in underground mine openings. Wooden cribbing formed from stacked pieces of timber generally allows for large amounts of vertical displacement prior to failure.
- Pumpable cribs which are formed by pumping a cementitious material into a collapsible containment bag, generally withstand much larger loads than wooden cribbing, but do not allow for as much vertical displacement as the wooden cribbing prior to failure.
- the containment bags are typically textile or fabric bags made of polypropylene and/or polyethylene, which are secured to a roof of the mine opening. The containment bags usually have a tube and one-way valve for receiving the cementitious material under pressure.
- a pumpable crib bag assembly in one embodiment, includes a containment bag having a body and a supporting member.
- the containment bag is configured to contain a cementitious material therein and has a first end, a second end, and an outer surface.
- the pumpable crib bag assembly further includes a reinforcing layer positioned adjacent to the outer surface of the containment bag.
- the body of the containment bag may include a plurality of layers, with a supporting member positioned between the plurality of layers.
- the reinforcing layer may circumferentially surround the containment bag and may extend from the first end to the second end of the containment bag.
- the reinforcing layer may comprise polyethylene.
- the reinforcing layer may comprise about 60-150 gauge polyethylene sheet material.
- the reinforcing layer may be a single sheet of material circumferentially surrounding the containment bag and extending from the first end of the containment bag to the second end of the containment bag.
- the containment bag may be substantially cylindrical or substantially frusto-conical.
- a method of installing a pumpable crib includes securing a first end of a containment bag to a roof portion of a mine opening, positioning a second end of the containment bag on a floor portion of the mine opening, filling the containment bag with a cementitious material, and positioning a reinforcing layer around an outer surface of the containment bag.
- the reinforcing layer may be helically wrapped around the containment bag and extend from the first end to the second end of the containment bag.
- the reinforcing layer may be a single sheet extending circumferentially around the containment bag and extending from the first end to the second end of the containment bag.
- the containment bag may include a body and a supporting member.
- the reinforcing layer may comprise polyethylene.
- the reinforcing layer may comprise about 60-150 gauge polyethylene sheet material.
- the containment bag may be filled with the cementitious material via a fill tube positioned adjacent the first end of the containment bag.
- the supporting member may be a helically wound wire and the body of the containment bag may include a plurality of layers, with the supporting member positioned between the plurality of layers.
- FIG. 1 is an elevational view of a pumpable crib according to one embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along the line 2 - 2 shown in FIG. 1 .
- FIG. 3 is an elevational view of the pumpable crib shown in FIG. 1 .
- FIG. 4 is an elevational view of a pumpable crib according to a second embodiment of the present invention.
- FIG. 5 is a cross-sectional view of a pumpable crib according to a third embodiment of the present invention.
- a pumpable crib bag assembly 10 includes a containment bag 12 having a body 14 and a supporting member 16 .
- the containment bag 12 has a first end 18 , a second end 20 , an outer surface 22 , and an inner surface 24 .
- the containment bag 12 defines an interior space 26 configured to receive and contain a cementitious material.
- a reinforcing layer 30 is positioned adjacent to the outer surface 22 of the containment bag 12 .
- the body 14 of the containment bag 12 is cylindrical and includes a plurality of layers 32 , 34 of material.
- the body 14 of the containment bag 12 may include an inner layer 32 of material that is non-permeable to water and an outer layer 34 , although the body 14 may be formed from a single, integral piece of material.
- the supporting member 16 is a steel wire that helically extends around the circumference of the containment bag 12 .
- the supporting member 16 is positioned between the inner and outer layers 32 , 34 of the body 14 of the containment bag 12 , although the supporting member 16 may also be secured to the inner surface 24 or outer surface 22 of the containment bag 12 .
- the containment bag 12 may be a conventional containment bag manufactured by Schaumburg having an 18 oz. fabric and a single 3/16′′ wire that spirals down from the first end 18 to the second end 20 with a 4′′ pitch.
- the containment bag 12 may have a diameter of 24′′, 27′′, 30′′, and 36′′, although other suitable diameters may be utilized.
- the reinforcing layer 30 circumferentially extends around the containment bag 12 and extends from the first end 18 to the second end 20 of the containment bag 12 , although the reinforcing layer 30 may cover only a portion of the circumference of the containment bag 12 and only extend for a portion of the length of the containment bag 12 .
- the thickness of the reinforcing layer 30 and the containment bag 12 has been exaggerated in FIG. 2 for clarity.
- the reinforcing layer 30 may be a shrink-wrap material commonly used to wrap pallets of material for shipping.
- the reinforcing layer 30 may be formed from about 60-150 gauge polyethylene sheet material, although other suitable materials and thicknesses may be utilized.
- the reinforcing layer 30 may be separate from the containment bag 12 or formed integrally with the containment bag 12 . As discussed below, the reinforcing layer 30 is flexible and may be formed from a material having greater flexibility or ductility compared to the containment bag 12 .
- the first end 18 of the containment bag 12 is engaged with a roof portion 38 of a mine opening 40
- the second end 20 of the containment bag 12 is engaged with a floor portion 42 of the mine opening 40
- a cementitious material 44 is received and contained within the interior space 26 of the containment bag 12 .
- the containment bag 12 includes a fill tube 46 for supplying the cementitious material 44 to the interior space 26 of the containment bag 12 .
- the containment bag 12 may also include a vent tube (not shown) to vent the air contained within the interior space 26 while the containment bag 12 is filled with the cementitious material 44 .
- the pumpable crib bag assembly 10 shown in FIGS. 1 and 2 may be installed by securing the first end 18 of the containment bag 12 to the roof 38 of the mine opening 40 using a fastener (not shown) that extends through an eyelet (not shown) in the bag 12 .
- the containment bag 12 may be secured directly to the roof 38 using an explosive anchor or may be secured to a mesh structure (not shown) positioned on the roof 38 using a zip tie.
- the second end 20 of the containment bag 12 is extended so that the second end 20 is positioned on the floor 42 of the mine opening 40 .
- the fill tube 46 is connected to fill lines (not shown) and the cementitious material 44 is pumped under pressure into the containment bag 12 until the entire bag is full.
- the reinforcing layer 30 is then positioned around the outer surface 22 of the containment bag 12 .
- the reinforcing layer 30 may be helically wrapped around the circumference of the containment bag 12 using a continuous sheet of material formed on a roll.
- the reinforcing layer 30 engages the containment bag 12 and also engages other portions of the reinforcing layer 30 as it is wrapped around the containment bag 12 .
- the reinforcing layer 30 may also be formed integrally with the containment bag 12 and positioned adjacent to the outer surface 22 of the containment bag 12 prior to installation of the containment bag 12 .
- the reinforcing layer 30 prevents fractured cementitious material 44 from falling out of the containment bag 12 , which frequently ruptures during vertical displacement of the assembly 10 .
- the reinforcing layer 30 is flexible and stretches to contain the fractured cementitious material 44 as it leaves the containment bag 12 .
- the pumpable crib bag assembly 10 has improved residual loading characteristics compared to a conventional pumpable crib.
- a second embodiment of a pumpable crib bag assembly 50 is disclosed.
- the pumpable crib bag assembly 50 is similar to the pumpable crib bag assembly 10 shown in FIGS. 1 and 2 except that the reinforcing layer 30 is provided as a single sheet 52 having a first end 54 and a second end 56 that is wrapped around the containment bag 12 .
- the first end 54 of the sheet 52 is secured to the second end 56 of the sheet 52 .
- the first end 54 of the sheet 52 may be secured to the second end 56 using a plurality of zip ties (not shown).
- the first end 54 of the sheet 52 may also be secured to the second end 56 using a zipper (not shown), although other suitable closure elements and fasteners may be utilized.
- the reinforcing layer 30 may also be provided as a cylindrically-shaped bag that circumferentially surrounds the containment bag 12 and is secured to the containment bag 12 via one or more fasteners, such zip ties.
- FIG. 4 a third embodiment of a pumpable crib bag assembly 70 is shown.
- the pumpable crib bag assembly 70 is similar to the pumpable crib bag assembly 10 shown in FIGS. 1-3 , but has a frusto-conical shape, with the diameter of the first end 18 being smaller than the diameter of the second end 20 .
- the frusto-conical shape enhances stability by providing a lower center of gravity and also provides increased critical load capacity.
- the frusto-conical shape mitigates floor heave due to its larger bottom area compared to a cylindrical-shaped crib.
- FIG. 5 a fourth embodiment of a pumpable crib bag assembly 80 is shown.
- the pumpable crib bag assembly 80 is similar to the pumpable crib bag assembly 10 shown in FIGS. 1-3 except that the reinforcing layer 30 is positioned on the inner surface 24 of the containment bag 12 .
- the reinforcing layer 30 will be positioned between the cementitious material 44 and the inner surface 24 of the containment bag 12 .
- the reinforcing layer 30 may be cylindrical and received within the cylindrical body 14 of the containment bag 12 .
- the reinforcing layer 30 may also have a smaller outer diameter than the inner diameter of the containment bag 12 such that cementitious material 44 is positioned between the containment bag 12 and the reinforcing layer 30 .
- the reinforcing layer 30 may be formed from a polyethylene, shrink-wrap material and may also be formed as a cylindrical sleeve.
- the reinforcing layer 30 also may be formed from a mesh material that allows the cementitious material 44 to flow through the reinforcing layer 30 .
- the reinforcing layer 30 consists entirely of a cylindrical mesh sleeve without any additional supporting structure for the reinforcing layer 30 .
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- 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)
- Packages (AREA)
- Revetment (AREA)
- Bag Frames (AREA)
Abstract
Description
- This application claims the benefit of U.S. patent application Ser. No. 13/453,546, filed Apr. 23, 2012, the entire content of which is hereby incorporated by reference, which in turn claims the benefit of U.S. Provisional Patent Application No. 61/477,929, filed Apr. 21, 2011, the entire content of which is hereby incorporated by reference.
- 1. Field of the Invention
- This invention is related to a method and apparatus for supporting a mine opening and, more particularly, to a pumpable crib and a method for installing a pumpable crib used to support a mine opening.
- 2. Description of Related Art
- Cribbing is frequently used to provide support in underground mine openings. Wooden cribbing formed from stacked pieces of timber generally allows for large amounts of vertical displacement prior to failure. Pumpable cribs, which are formed by pumping a cementitious material into a collapsible containment bag, generally withstand much larger loads than wooden cribbing, but do not allow for as much vertical displacement as the wooden cribbing prior to failure. The containment bags are typically textile or fabric bags made of polypropylene and/or polyethylene, which are secured to a roof of the mine opening. The containment bags usually have a tube and one-way valve for receiving the cementitious material under pressure.
- In one embodiment, a pumpable crib bag assembly includes a containment bag having a body and a supporting member. The containment bag is configured to contain a cementitious material therein and has a first end, a second end, and an outer surface. The pumpable crib bag assembly further includes a reinforcing layer positioned adjacent to the outer surface of the containment bag.
- The body of the containment bag may include a plurality of layers, with a supporting member positioned between the plurality of layers. The reinforcing layer may circumferentially surround the containment bag and may extend from the first end to the second end of the containment bag. The reinforcing layer may comprise polyethylene. The reinforcing layer may comprise about 60-150 gauge polyethylene sheet material. The reinforcing layer may be a single sheet of material circumferentially surrounding the containment bag and extending from the first end of the containment bag to the second end of the containment bag. The containment bag may be substantially cylindrical or substantially frusto-conical.
- In a further embodiment, a method of installing a pumpable crib includes securing a first end of a containment bag to a roof portion of a mine opening, positioning a second end of the containment bag on a floor portion of the mine opening, filling the containment bag with a cementitious material, and positioning a reinforcing layer around an outer surface of the containment bag.
- The reinforcing layer may be helically wrapped around the containment bag and extend from the first end to the second end of the containment bag. The reinforcing layer may be a single sheet extending circumferentially around the containment bag and extending from the first end to the second end of the containment bag. The containment bag may include a body and a supporting member. The reinforcing layer may comprise polyethylene. The reinforcing layer may comprise about 60-150 gauge polyethylene sheet material. The containment bag may be filled with the cementitious material via a fill tube positioned adjacent the first end of the containment bag. Further, the supporting member may be a helically wound wire and the body of the containment bag may include a plurality of layers, with the supporting member positioned between the plurality of layers.
-
FIG. 1 is an elevational view of a pumpable crib according to one embodiment of the present invention. -
FIG. 2 is a cross-sectional view taken along the line 2-2 shown inFIG. 1 . -
FIG. 3 is an elevational view of the pumpable crib shown inFIG. 1 . -
FIG. 4 is an elevational view of a pumpable crib according to a second embodiment of the present invention. -
FIG. 5 is a cross-sectional view of a pumpable crib according to a third embodiment of the present invention. - The present invention will now be described with reference to the accompanying figures. For purposes of the description hereinafter, the terms “upper”, “lower”, “right”, “left”, “vertical”, “horizontal”, “top”, “bottom”, and derivatives thereof shall relate to the invention as it is oriented in the drawing figures. However, it is to be understood that the invention may assume various alternative variations and step sequences, except where expressly specified to the contrary. It is to be understood that the specific apparatus illustrated in the attached figures and described in the following specification is simply an exemplary embodiment of the present invention. Hence, specific dimensions and other physical characteristics related to the embodiments disclosed herein are not to be considered as limiting.
- Referring to
FIGS. 1 and 2 , one embodiment of a pumpablecrib bag assembly 10 includes acontainment bag 12 having abody 14 and a supportingmember 16. Thecontainment bag 12 has afirst end 18, asecond end 20, anouter surface 22, and aninner surface 24. Thecontainment bag 12 defines aninterior space 26 configured to receive and contain a cementitious material. A reinforcinglayer 30 is positioned adjacent to theouter surface 22 of thecontainment bag 12. Thebody 14 of thecontainment bag 12 is cylindrical and includes a plurality oflayers body 14 of thecontainment bag 12 may include aninner layer 32 of material that is non-permeable to water and anouter layer 34, although thebody 14 may be formed from a single, integral piece of material. The supportingmember 16 is a steel wire that helically extends around the circumference of thecontainment bag 12. The supportingmember 16 is positioned between the inner andouter layers body 14 of thecontainment bag 12, although the supportingmember 16 may also be secured to theinner surface 24 orouter surface 22 of thecontainment bag 12. In a particular non-limiting embodiment, thecontainment bag 12 may be a conventional containment bag manufactured by Schaumburg having an 18 oz. fabric and a single 3/16″ wire that spirals down from thefirst end 18 to thesecond end 20 with a 4″ pitch. Thecontainment bag 12 may have a diameter of 24″, 27″, 30″, and 36″, although other suitable diameters may be utilized. - Referring to
FIG. 2 , the reinforcinglayer 30 circumferentially extends around thecontainment bag 12 and extends from thefirst end 18 to thesecond end 20 of thecontainment bag 12, although the reinforcinglayer 30 may cover only a portion of the circumference of thecontainment bag 12 and only extend for a portion of the length of thecontainment bag 12. The thickness of the reinforcinglayer 30 and thecontainment bag 12 has been exaggerated inFIG. 2 for clarity. The reinforcinglayer 30 may be a shrink-wrap material commonly used to wrap pallets of material for shipping. In particular, the reinforcinglayer 30 may be formed from about 60-150 gauge polyethylene sheet material, although other suitable materials and thicknesses may be utilized. The reinforcinglayer 30 may be separate from thecontainment bag 12 or formed integrally with thecontainment bag 12. As discussed below, the reinforcinglayer 30 is flexible and may be formed from a material having greater flexibility or ductility compared to thecontainment bag 12. - Referring again to
FIGS. 1 and 2 , in use, thefirst end 18 of thecontainment bag 12 is engaged with aroof portion 38 of a mine opening 40, and thesecond end 20 of thecontainment bag 12 is engaged with afloor portion 42 of the mine opening 40. Acementitious material 44 is received and contained within theinterior space 26 of thecontainment bag 12. Thecontainment bag 12 includes afill tube 46 for supplying thecementitious material 44 to theinterior space 26 of thecontainment bag 12. Thecontainment bag 12 may also include a vent tube (not shown) to vent the air contained within theinterior space 26 while thecontainment bag 12 is filled with thecementitious material 44. - The pumpable
crib bag assembly 10 shown inFIGS. 1 and 2 may be installed by securing thefirst end 18 of thecontainment bag 12 to theroof 38 of themine opening 40 using a fastener (not shown) that extends through an eyelet (not shown) in thebag 12. For example, thecontainment bag 12 may be secured directly to theroof 38 using an explosive anchor or may be secured to a mesh structure (not shown) positioned on theroof 38 using a zip tie. Thesecond end 20 of thecontainment bag 12 is extended so that thesecond end 20 is positioned on thefloor 42 of themine opening 40. Thefill tube 46 is connected to fill lines (not shown) and thecementitious material 44 is pumped under pressure into thecontainment bag 12 until the entire bag is full. The reinforcinglayer 30 is then positioned around theouter surface 22 of thecontainment bag 12. The reinforcinglayer 30 may be helically wrapped around the circumference of thecontainment bag 12 using a continuous sheet of material formed on a roll. The reinforcinglayer 30 engages thecontainment bag 12 and also engages other portions of the reinforcinglayer 30 as it is wrapped around thecontainment bag 12. The reinforcinglayer 30, however, may also be formed integrally with thecontainment bag 12 and positioned adjacent to theouter surface 22 of thecontainment bag 12 prior to installation of thecontainment bag 12. - Under loading and vertical displacement of the pumpable
crib bag assembly 10, the reinforcinglayer 30 prevents fracturedcementitious material 44 from falling out of thecontainment bag 12, which frequently ruptures during vertical displacement of theassembly 10. The reinforcinglayer 30 is flexible and stretches to contain the fracturedcementitious material 44 as it leaves thecontainment bag 12. The pumpablecrib bag assembly 10 has improved residual loading characteristics compared to a conventional pumpable crib. - Referring to
FIG. 3 , a second embodiment of a pumpablecrib bag assembly 50 is disclosed. The pumpablecrib bag assembly 50 is similar to the pumpablecrib bag assembly 10 shown inFIGS. 1 and 2 except that the reinforcinglayer 30 is provided as asingle sheet 52 having afirst end 54 and asecond end 56 that is wrapped around thecontainment bag 12. Thefirst end 54 of thesheet 52 is secured to thesecond end 56 of thesheet 52. Thefirst end 54 of thesheet 52 may be secured to thesecond end 56 using a plurality of zip ties (not shown). Thefirst end 54 of thesheet 52 may also be secured to thesecond end 56 using a zipper (not shown), although other suitable closure elements and fasteners may be utilized. Although not shown, the reinforcinglayer 30 may also be provided as a cylindrically-shaped bag that circumferentially surrounds thecontainment bag 12 and is secured to thecontainment bag 12 via one or more fasteners, such zip ties. - Referring to
FIG. 4 , a third embodiment of a pumpablecrib bag assembly 70 is shown. The pumpablecrib bag assembly 70 is similar to the pumpablecrib bag assembly 10 shown inFIGS. 1-3 , but has a frusto-conical shape, with the diameter of thefirst end 18 being smaller than the diameter of thesecond end 20. The frusto-conical shape enhances stability by providing a lower center of gravity and also provides increased critical load capacity. In addition, the frusto-conical shape mitigates floor heave due to its larger bottom area compared to a cylindrical-shaped crib. - Referring to
FIG. 5 , a fourth embodiment of a pumpablecrib bag assembly 80 is shown. The pumpablecrib bag assembly 80 is similar to the pumpablecrib bag assembly 10 shown inFIGS. 1-3 except that the reinforcinglayer 30 is positioned on theinner surface 24 of thecontainment bag 12. Thus, in use, the reinforcinglayer 30 will be positioned between thecementitious material 44 and theinner surface 24 of thecontainment bag 12. The reinforcinglayer 30 may be cylindrical and received within thecylindrical body 14 of thecontainment bag 12. The reinforcinglayer 30 may also have a smaller outer diameter than the inner diameter of thecontainment bag 12 such thatcementitious material 44 is positioned between thecontainment bag 12 and the reinforcinglayer 30. As discussed above, the reinforcinglayer 30 may be formed from a polyethylene, shrink-wrap material and may also be formed as a cylindrical sleeve. The reinforcinglayer 30 also may be formed from a mesh material that allows thecementitious material 44 to flow through the reinforcinglayer 30. In one particular embodiment, the reinforcinglayer 30 consists entirely of a cylindrical mesh sleeve without any additional supporting structure for the reinforcinglayer 30. - While several embodiments were described in the foregoing detailed description, those skilled in the art may make modifications and alterations to these embodiments without departing from the scope and spirit of the invention. Accordingly, the foregoing description is intended to be illustrative rather than restrictive.
Claims (20)
Priority Applications (1)
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US14/444,202 US20140363241A1 (en) | 2011-04-21 | 2014-07-28 | Pumpable Crib |
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US201161477929P | 2011-04-21 | 2011-04-21 | |
US13/453,546 US9181801B2 (en) | 2011-04-21 | 2012-04-23 | Pumpable crib |
US14/444,202 US20140363241A1 (en) | 2011-04-21 | 2014-07-28 | Pumpable Crib |
Related Parent Applications (1)
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US13/453,546 Continuation US9181801B2 (en) | 2011-04-21 | 2012-04-23 | Pumpable crib |
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US14/444,202 Abandoned US20140363241A1 (en) | 2011-04-21 | 2014-07-28 | Pumpable Crib |
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Families Citing this family (8)
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AU2017222565B2 (en) * | 2016-02-24 | 2020-03-05 | Micon | Load support drum with resilient core member |
US10822948B2 (en) | 2017-12-28 | 2020-11-03 | Burrell Mining Products, Inc. | Mine roof support, pre-installation assembly for same, and method of installation |
US11053683B2 (en) * | 2018-01-24 | 2021-07-06 | Strata Products Worldwide, Llc | Apparatus for controlling yield performance of props for roofs, and methods |
US10883366B2 (en) * | 2018-10-24 | 2021-01-05 | Crosscut Enterprises LLC | Mine roof support |
EP3953567A4 (en) * | 2019-04-11 | 2022-12-07 | Burrell Mining Products, Inc. | Mine roof support, pre-installation assembly for same, and method of installation |
CN111648800A (en) * | 2020-07-03 | 2020-09-11 | 张明东 | Colliery mine hole uses interim supporting device with adjustable secondary limit function |
US11702935B2 (en) | 2020-09-18 | 2023-07-18 | Fci Holdings Delaware, Inc. | Pumpable crib bag |
WO2023235919A1 (en) * | 2022-06-06 | 2023-12-14 | Abc Industries, Inc. | Pumpable crib bag assembly |
Citations (1)
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US4923339A (en) * | 1987-09-14 | 1990-05-08 | Fomico International, Inc. | Foldable concrete retaining wall structure |
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GB1038952A (en) | 1961-11-21 | 1966-08-17 | Dobson Ltd W E & F | Improvements in or relating to mine roof supports |
US3358906A (en) * | 1966-12-29 | 1967-12-19 | Lamson Paragon Ltd | Heat sealable plastic material bags for coins |
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US4277204A (en) | 1979-09-13 | 1981-07-07 | Bochumer Eisenhutte Heintzmann Gmbh & Co. | Excavation roof support and method of installing the same |
US4983077A (en) | 1987-08-26 | 1991-01-08 | Gebhardt & Koenig-Gesteins- Und Tiefbau Gmbh | Method and an apparatus for producing fabric-reinforced lining supports or slender supporting structural units |
US5015125A (en) | 1990-04-05 | 1991-05-14 | Seegmiller Ben L | Yieldable mine post |
DE4115209A1 (en) | 1991-05-10 | 1992-11-12 | Volker Merz | EXTENSION SUPPORT |
US5308196B1 (en) | 1993-03-23 | 1999-06-22 | Coastal Corp | Yieldable confined core mine roof support |
US6394707B1 (en) | 1997-05-08 | 2002-05-28 | Jack Kennedy Metal Products & Buildings, Inc. | Yieldable mine roof support |
US7165888B2 (en) * | 2001-07-25 | 2007-01-23 | Avery Dennison Corporation | Resealable closures for packages and packages containing the same |
US7654777B2 (en) | 2006-03-28 | 2010-02-02 | Norsenet (Pty) Limited | Grout pack restraining system |
GB0616053D0 (en) * | 2006-08-11 | 2006-09-20 | Bhp Billiton Petroleum Pty Ltd | Improvements relating to hose |
ZA200800631B (en) | 2007-01-18 | 2009-02-25 | Skarboevig Nils Mittet | A grout bag type of underground support |
ZA200808312B (en) * | 2007-10-24 | 2009-11-25 | Nils Mittet Skarboevig | Mine support grout bags and grout packs |
ZA200907770B (en) | 2008-12-04 | 2010-06-30 | Nils Mittet Skarboevig | Mine support grout packs |
CA2796931C (en) | 2010-04-22 | 2017-01-03 | Micon | Pumpable support with cladding |
US8246276B2 (en) | 2010-07-09 | 2012-08-21 | Abc Industries, Inc. | Pumpable crib bag assembly and method of installation |
-
2012
- 2012-04-23 US US13/453,546 patent/US9181801B2/en active Active
-
2014
- 2014-07-28 US US14/444,202 patent/US20140363241A1/en not_active Abandoned
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US4923339A (en) * | 1987-09-14 | 1990-05-08 | Fomico International, Inc. | Foldable concrete retaining wall structure |
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US20120269585A1 (en) | 2012-10-25 |
US9181801B2 (en) | 2015-11-10 |
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Owner name: WELLS FARGO BANK, NATIONAL ASSOCIATION, NEW YORK Free format text: SECURITY AGREEMENT;ASSIGNORS:DSI UNDERGROUND SYSTEMS, LLC;FCI HOLDINGS DELAWARE, INC., A DELAWARE CORPORATION;J-LOK CO., A PENNSYLVANIA CORPORATION;REEL/FRAME:038179/0591 Effective date: 20160229 |
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Owner name: FCI HOLDINGS DELAWARE, INC., DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FAULKNER, DAKOTA;REEL/FRAME:039309/0057 Effective date: 20120425 |
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