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US20030068204A1 - Lite mine roof support crib and method - Google Patents

Lite mine roof support crib and method Download PDF

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Publication number
US20030068204A1
US20030068204A1 US09/975,341 US97534101A US2003068204A1 US 20030068204 A1 US20030068204 A1 US 20030068204A1 US 97534101 A US97534101 A US 97534101A US 2003068204 A1 US2003068204 A1 US 2003068204A1
Authority
US
United States
Prior art keywords
block
chock
notch
crib
chocks
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
Application number
US09/975,341
Other languages
English (en)
Inventor
Gregory Paton-Ash
John Reinmann
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.)
Strata Products USA Inc
Original Assignee
Strata Products USA Inc
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 Strata Products USA Inc filed Critical Strata Products USA Inc
Priority to US09/975,341 priority Critical patent/US20030068204A1/en
Assigned to STRATA PRODUCTS (USA), INC. reassignment STRATA PRODUCTS (USA), INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PATON-ASH, GREGORY ROY, REINMANN, JR., JOHN JOSEPH
Priority to AU2002362655A priority patent/AU2002362655B2/en
Priority to PCT/US2002/031725 priority patent/WO2003031773A2/fr
Priority to GB0406143A priority patent/GB2395732B/en
Publication of US20030068204A1 publication Critical patent/US20030068204A1/en
Priority to ZA200402759A priority patent/ZA200402759B/en
Priority to US11/221,272 priority patent/US20060002770A1/en
Priority to US13/065,152 priority patent/US20110164929A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • E21D15/02—Non-telescopic props
    • E21D15/04—Non-telescopic props with wooden prop parts joined by double conical connectors

Definitions

  • the present invention is related to mine support cribs. More specifically, the present invention is related to mine support cribs having reduced amounts of wood or material.
  • U.S. Pat. No. 5,746,547 teaches a support formed by a plurality of parallel, notched chocks which are assembled to create a singular structure. While unique, this structure has the drawback of being material intensive. In many cases, the device provides more support than is necessary for the task and as such is not cost effective.
  • the present invention pertains to a mine roof support crib.
  • the crib comprises a plurality of chocks that are connected together through notches in the chocks to form at least three planes and able to support at least five tons of load.
  • Each notch has only one edge.
  • the present invention pertains to a mine roof support crib.
  • the crib comprises a plurality of chocks that are connected together through notches in the chocks to form at least three planes and are able to support at least five tons of load.
  • Each chock has a primary piece having a top and a bottom, a first block and a second block disposed on the top and bottom, respectively, and means for attaching the first block and second block to the primary piece.
  • the present invention pertains to a method of forming a mine roof support crib.
  • the method comprises the steps of placing a first chock having at least one notch with only one edge in a mine.
  • There is the step of linking a desired number of additional chocks having notches with only one edge onto each other or the first, second, third or fourth chocks through notches of and the respective chocks until at least two planes are formed.
  • the present invention pertains to a method of forming a chock for a mine roof crib to support a mine roof.
  • the method comprises the steps of attaching a first block to a top surface of a primary piece in spaced relationship to each end of the primary piece to define notches at each end of the top surface of the primary piece.
  • FIG. 1 shows a chock of a first embodiment of the present invention.
  • FIG. 2 shows a chock of a second embodiment of the present invention.
  • FIGS. 3 and 4 show a chock of a third embodiment of the present invention.
  • FIGS. 5 and 6 show a chock of a fourth embodiment of the present invention.
  • FIGS. 7, 8, 9 and 10 show a chock of a fifth embodiment of the present invention with a spacer, bar pin or staple, respectively.
  • FIG. 11 shows a crib of the present invention.
  • FIG. 12 is a graph of support performance.
  • FIG. 11 there is shown a mine roof support crib 10 .
  • the crib 10 comprises a plurality of chocks 12 that are connected together through notches 14 in the chocks 12 to form at least three planes 16 and able to support at least five tons of load. Each notch has only one edge 18 .
  • the plurality of chocks 12 connected together can support at least 20 tons of load.
  • Each chock 12 preferably has a long axis 20 and each notch of the chock 12 is cut at a right angle to the long axis 20 of the chock 12 .
  • the plurality of chocks 12 forms four planes 16 .
  • Each notch can have either a spacer 22 or a bar pin 24 or a staple 26 defining a receive zone 28 with the edge 18 of the corresponding notch, as shown in FIGS. 7 - 10 .
  • the receive zone 28 receives a notch of an adjacent chock 12 .
  • the height of the spacer 22 , bar pin 24 or staple 26 is preferably less than the rise of the edge 18 of the corresponding notch.
  • Each chock 12 preferably has a primary piece 30 having a top and a bottom, a first block 36 and a second block 38 disposed on the top and bottom, respectively, and means for attaching the first block 36 and second block 38 to the primary piece 30 .
  • An outward surface of the first block 36 and second block 38 defines the edge 18 of a first notch and of a second notch of each chock 12 .
  • the crib 10 preferably includes a base 48 on which the chocks 12 are disposed.
  • the base 48 is adapted to reside on a floor 50 of the mine.
  • the crib 10 includes a top portion 52 which is disposed on the chocks 12 which is adapted to fit between the chocks 12 and a roof 54 of the mine so the chocks 12 are prestressed.
  • the present invention pertains to a mine roof support crib 10 , as shown in FIGS. 1 and 11.
  • the crib 10 comprises a plurality of chocks 12 that are connected together through notches 14 in the chocks 12 to form at least three planes 16 and are able to support at least five tons of load.
  • Each chock 12 has a primary piece 30 having a top surface 32 and a bottom surface 34 , a first block 36 and a second block 38 disposed on the top and bottom, respectively, and means for attaching the first block 36 and second block 38 to the primary piece 30 .
  • the attaching means includes a nail 56 or wire 58 .
  • Each chock 12 can include a third block 40 and a fourth block 42 in spaced relationship with the first and second blocks 36 , 38 , respectively, as shown in FIG. 2.
  • the third and fourth blocks 40 , 42 are attached to the primary piece 30 .
  • the primary piece 30 has a first end and a second end and a top surface 32 and a bottom surface 34 and the first block 36 , second block 38 , third block 40 and fourth block 42 are in spaced relationship from the first end of the top surface 32 , first end of the bottom surface 34 , second end of the top surface 32 and second end of the bottom surface 34 , respectively, to form notches 14 in the chock 12 .
  • the first block 36 and second block 38 are preferably made of oak, hard gum, wattle, maple, hickory, poplar or pine or concrete or a composite of wood fiber cement.
  • the primary piece 30 has a first end and a second end and a top surface 32 and a bottom surface 34 and the first block 36 and second block 38 are in spaced relationship with the first end and second end of the top surface 32 , and the first end and second end of the bottom surface 34 , respectively, to form notches 14 in the chock 12 with each notch having an edge 18 defined by the respective block, to receive a notch from an adjacent chock 12 .
  • each notch has either a spacer 22 or a bar pin 24 or a staple 26 defining a receive zone 28 with the edge 18 of the corresponding notch, the receive zone 28 receiving a notch of an adjacent chock 12 , as shown in FIGS. 7 - 10 .
  • the height of the spacer 22 , bar pin 24 or staple 26 can be less than the rise of the edge 18 of the corresponding notch.
  • the crib 10 can include a fifth block 44 and a sixth block 46 in spaced relationship with the first and second blocks 36 , 38 , respectively, as shown in FIGS. 3 and 4.
  • the third and fifth, and fourth and sixth blocks 42 , 46 each form a notch with the first block 36 and second block 38 , respectively, to receive a notch from a respective chock 12 .
  • the height of the third, fourth, fifth and sixth blocks 44 , 46 can be less than the heights of the first block 36 and second block 38 .
  • the present invention pertains to a method of forming a mine roof support crib 10 .
  • the method comprises the steps of placing a first chock 12 having at least one notch with only one edge 18 in a mine.
  • the present invention pertains to a method of forming a chock 12 for a mine roof crib 10 to support a mine roof 54 .
  • the method comprises the steps of attaching a first block 36 to a top surface 32 of a primary piece 30 in spaced relationship to each end of the primary piece 30 to define notches 14 at each end of the top surface 32 of the primary piece 30 .
  • the stop preferably includes blocks, spacers, 22 bar pins 24 or staples 26 .
  • FIG. 11 In the operation of the invention and referring to FIG. 11, there is shown a crib 10 that is formed from chocks 12 as shown in FIG. 1.
  • the chock 12 shown in FIG. 1, is formed of a primary piece 30 made of wood and a first block 36 on top of the primary piece 30 and a second block 38 on the bottom of the primary piece 30 .
  • the first block 36 and the second block 38 are attached to the primary piece 30 by nails 56 or by spinning wire 58 through the wood, as is well known in the art.
  • the end of each surface of the first block 36 and the second block 38 is in spaced relationship with the respective end of the primary piece 30 , defining a notch with an edge 18 .
  • FIG. 2 there is a primary piece 30 and a first block 36 , second block 38 , third block 40 and fourth block 42 attached to the primary piece 30 .
  • Each block is in spaced relation with the other block on the same surface of the chock 12 , and in spaced relation with the respective end of the primary piece 30 .
  • the edge 18 of each block adjacent to the respective end of the primary piece 30 defines a notch.
  • the edge 18 of each block defines an edge 18 of a notch in which a notch of another chock 12 is dispensed.
  • FIG. 3 and FIG. 4 there is shown a chock 12 having a block attached at the four corners, with each of these blocks in spaced relationship with the middle blocks on their respective surface of the primary piece 30 .
  • This embodiment of a chock 12 would serve three purposes. 1, to increase the contact area and hence increase the load capacity of the crib 10 . 2, to help ensure the chocks 12 on the layer above and the layer below are positioned in the correct place between the end blocks and the respective middle blocks. 3, to ensure the interlock and prevent the chocks 12 from moving outwards under load.
  • FIGS. 5 and 6 show yet another embodiment of a chock 12 that is similar to the embodiment shown in FIGS. 3 and 4. The only difference is that the blocks on each corner have a height which is less than the rise of the attached center blocks.
  • This embodiment of a chock 12 would serve purposes 2 and 3, as described above, for the chock 12 of FIGS. 3 and 4.
  • FIGS. 7, 8, 9 and 10 show yet another embodiment of a chock 12 for use in the mine roof crib 10 .
  • the chock 12 shown in FIG. 7 there is again a first piece and a second piece attached to the primary piece 30 . Adjacent to the ends of the primary piece 30 are placed either spacers 22 , bar pins 24 or staples 26 where their height is less than the rise of the first and second pieces.
  • the placement of the spacers 22 , bar pins 24 or staples 26 is well known in the art.
  • the purposes of such a chock 12 is the same as the purposes identified for the chock 12 in FIGS. 5 and 6.
  • the attachment of the blocks to the primary piece 30 can be accomplished with the use of nails 56 or by spinning wire 58 through wood.
  • the blocks can be of various types of wood, such as those mentioned above.
  • the blocks to be made of concrete that are cast with holes through them to allow wires 58 to pass to them and be inserted into the wood of the primary piece 30 as is well known in the art.
  • the blocks can also be made out of a wood cement composite, as is well known in the art.
  • the chocks 12 of the various embodiments are stacked on top of each other to a desired height on a base 48 which could be formed simply of two primary pieces 30 in spaced relationship with each other and in parallel with each other a distance apart that would conform with notches 14 of a chock 12 that would be fitted on them, as shown in FIG. 7.
  • planks or grout bags or other commonly used tops are inserted on the chocks 12 to prestress the crib 10 with the mine roof 54 .
  • FIG. 12 is based on chocks 110 cm long by 15 cm high (primary piece and first and second blocks) by 7.5 cm wide forming a crib 1.3 m high.
  • the crib 10 is made functional as a support by filling in any space between the top portion 52 of the support and the surface of the rock mass to be supported by one or more of the following methods.
  • grout bladders 87 into which a polymeric or cementitious grout can be pumped to fill in the space between the support and the rock surface, as shown in FIG. 11.
  • These grout bladders may be made to match the shape of the support or may be substantially larger and made to cover multiple supports installed in a given area.
  • the height of a chock is about two times its width.
  • a more timber intensive chock would have its height equal to its width.
  • the pieces can be of different materials, some stronger, some weaker, to essentially allow mixing and matching of the pieces, to spread the strong pieces out with weaker pieces to form many chocks, when there is not an unlimited supply of stronger pieces.
  • the primary piece can be a less strong wood while the first and second blocks can be of a stronger or denser wood, or vice versa.
  • attaching blocks such as concrete or wood fiber cement (which are not even made of wood), which is stronger or denser then the other types of wood that can be used for the primary piece.
  • This also allows for the chocks to have their cross section built up from wood that has a smaller than desired cross section.

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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)
  • Reinforcement Elements For Buildings (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Tents Or Canopies (AREA)
US09/975,341 2001-10-10 2001-10-10 Lite mine roof support crib and method Abandoned US20030068204A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US09/975,341 US20030068204A1 (en) 2001-10-10 2001-10-10 Lite mine roof support crib and method
AU2002362655A AU2002362655B2 (en) 2001-10-10 2002-10-04 Lite mine roof support crib and method
PCT/US2002/031725 WO2003031773A2 (fr) 2001-10-10 2002-10-04 Cadre de soutenement leger de toit de mine et procede
GB0406143A GB2395732B (en) 2001-10-10 2002-10-04 Lite mine roof support crib and method
ZA200402759A ZA200402759B (en) 2001-10-10 2004-04-08 Lite mine roof support crib and method
US11/221,272 US20060002770A1 (en) 2001-10-10 2005-09-07 Lite mine roof support crib and method
US13/065,152 US20110164929A1 (en) 2001-10-10 2011-03-15 Lite mine roof support crib and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/975,341 US20030068204A1 (en) 2001-10-10 2001-10-10 Lite mine roof support crib and method

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/221,272 Continuation US20060002770A1 (en) 2001-10-10 2005-09-07 Lite mine roof support crib and method

Publications (1)

Publication Number Publication Date
US20030068204A1 true US20030068204A1 (en) 2003-04-10

Family

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Family Applications (3)

Application Number Title Priority Date Filing Date
US09/975,341 Abandoned US20030068204A1 (en) 2001-10-10 2001-10-10 Lite mine roof support crib and method
US11/221,272 Abandoned US20060002770A1 (en) 2001-10-10 2005-09-07 Lite mine roof support crib and method
US13/065,152 Abandoned US20110164929A1 (en) 2001-10-10 2011-03-15 Lite mine roof support crib and method

Family Applications After (2)

Application Number Title Priority Date Filing Date
US11/221,272 Abandoned US20060002770A1 (en) 2001-10-10 2005-09-07 Lite mine roof support crib and method
US13/065,152 Abandoned US20110164929A1 (en) 2001-10-10 2011-03-15 Lite mine roof support crib and method

Country Status (5)

Country Link
US (3) US20030068204A1 (fr)
AU (1) AU2002362655B2 (fr)
GB (1) GB2395732B (fr)
WO (1) WO2003031773A2 (fr)
ZA (1) ZA200402759B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100221073A1 (en) * 2007-09-12 2010-09-02 Board Of Trustees Of Southern Illinois University Engineered composite wooden crib for use as a mine support
US11479939B2 (en) * 2019-11-26 2022-10-25 Dica Marketing Company Slot lock cribbing block
USD1073575S1 (en) 2022-05-26 2025-05-06 Dica Marketing Company Interlocking outrigger pad support

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2009209379B2 (en) * 2008-01-14 2015-01-29 Micon Mine seal with adhesive
CA2750663C (fr) * 2009-01-30 2015-12-01 Three Rivers Packaging, Inc. Protections de roches de mine empilables
WO2017127900A1 (fr) * 2016-01-29 2017-08-03 Hoan Holdings Pty Ltd Élément de cadre porteur et agencements de cadre porteur
PL448202A1 (pl) * 2024-04-05 2025-10-06 Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie Kaszt górniczy i sposób wytwarzania kasztu górniczego

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US2315441A (en) * 1940-08-23 1943-03-30 Massey Concrete Products Compa Cribbing
US4823528A (en) * 1987-02-03 1989-04-25 Garland Faw Log wall and corner joint for log building structures
US4905409A (en) * 1987-11-09 1990-03-06 Cole Clayton K Landscaping timber

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CA2114677C (fr) * 1994-02-01 1997-12-30 Horacio Correia Bloc pour murs de soutenement
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GB9905324D0 (en) * 1999-03-09 1999-04-28 Sharp George R Support ststem
US6352392B1 (en) * 1999-10-08 2002-03-05 Strata Products (Usa), Inc. Mine roof support crib having only two or three planes, and method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2315441A (en) * 1940-08-23 1943-03-30 Massey Concrete Products Compa Cribbing
US4823528A (en) * 1987-02-03 1989-04-25 Garland Faw Log wall and corner joint for log building structures
US4905409A (en) * 1987-11-09 1990-03-06 Cole Clayton K Landscaping timber

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100221073A1 (en) * 2007-09-12 2010-09-02 Board Of Trustees Of Southern Illinois University Engineered composite wooden crib for use as a mine support
US7841805B2 (en) * 2007-09-12 2010-11-30 Board Of Trustees Of Southern Illinois University Engineered composite wooden crib for use as a mine support
US11479939B2 (en) * 2019-11-26 2022-10-25 Dica Marketing Company Slot lock cribbing block
USD1073575S1 (en) 2022-05-26 2025-05-06 Dica Marketing Company Interlocking outrigger pad support

Also Published As

Publication number Publication date
US20060002770A1 (en) 2006-01-05
WO2003031773A3 (fr) 2004-02-19
GB2395732B (en) 2005-11-23
GB2395732A (en) 2004-06-02
ZA200402759B (en) 2006-06-28
AU2002362655B2 (en) 2008-04-03
WO2003031773A2 (fr) 2003-04-17
GB0406143D0 (en) 2004-04-21
US20110164929A1 (en) 2011-07-07

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Legal Events

Date Code Title Description
AS Assignment

Owner name: STRATA PRODUCTS (USA), INC., GEORGIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PATON-ASH, GREGORY ROY;REINMANN, JR., JOHN JOSEPH;REEL/FRAME:012567/0183

Effective date: 20020113

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION