EP2748432A1 - Selbstbohrender reibrohranker - Google Patents

Selbstbohrender reibrohranker

Info

Publication number
EP2748432A1
EP2748432A1 EP12825784.7A EP12825784A EP2748432A1 EP 2748432 A1 EP2748432 A1 EP 2748432A1 EP 12825784 A EP12825784 A EP 12825784A EP 2748432 A1 EP2748432 A1 EP 2748432A1
Authority
EP
European Patent Office
Prior art keywords
adapter
friction bolt
drilling
drilling rod
drill bit
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.)
Withdrawn
Application number
EP12825784.7A
Other languages
English (en)
French (fr)
Other versions
EP2748432A4 (de
Inventor
Mauricio Antonio HIDALGO SALGADO
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.)
FCI Holdings Delaware Inc
Original Assignee
FCI Holdings Delaware 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 FCI Holdings Delaware Inc filed Critical FCI Holdings Delaware Inc
Publication of EP2748432A1 publication Critical patent/EP2748432A1/de
Publication of EP2748432A4 publication Critical patent/EP2748432A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/004—Bolts held in the borehole by friction all along their length, without additional fixing means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0053—Anchoring-bolts in the form of lost drilling rods

Definitions

  • the present invention relates to reinforcement systems and, more particularly, to a self-drilling friction bolt for mining and civil applications.
  • Reinforcement systems can be classified in a variety of ways. Reinforcement systems can be classified according to work force, including Passive Anchors (ref. Antonio Ros, Dissertation project, pg. 142); Active Anchors (ref. Antonio Ros, Dissertation project, pg. 142); and Mixed Anchors (ref. Antonio Ros, Dissertation project, pg. 142). Reinforcement systems can also be classified according to the support mechanism, including Adherence Anchors (ref. Antonio Ros, Dissertation project, pg. 142) and Friction Anchors (ref. Antonio Ros, Dissertation project, pg. 142).
  • Friction bolt arrangements make use of the resistance generated against the rock as their fastening method, taking advantage of the friction or rubbing between the rock and the element as the latter is deformed during installation made through impact with a shank or adapter.
  • the conventional way in which these elements are installed is as follows: first, drilling takes place in the rock using a suitable drilling system, followed by placement of the bolt in the machine that installs it. The bolt is positioned in the newly made perforation and percussion installs the element.
  • One embodiment of the present invention relates to a reinforcement system that employs the principle of a friction bolt, self-installed or self-drilled, thus simplifying previous tasks associated with current conventional systems that initially involve suitable drilling, followed by the bolt's installation in the recently made perforation.
  • a reinforcement system includes an adapter, a friction bolt, a drilling rod coupled to the adapter, and a drill bit configured to drill an opening optimally sized for receiving the friction bolt.
  • the drilling rod has a diameter that allows for introduction of the drilling rod into the friction bolt.
  • the adapter of the reinforcement system may include first and second threaded portions, and a neck that acts as a guide and impact element for installing the friction bolt.
  • the first threaded portion of the adapter may be positioned at one end of the adapter, with the second threaded portion positioned at the other end of the adapter.
  • the drilling rod may include a threaded portion engaged with the second threaded portion of the adapter.
  • the adapter may define a central passageway along the entire length of the adapter to enable circulation of water or air from a drilling machine.
  • the friction bolt may define a passageway that receives a portion of the drilling rod.
  • the drilling rod may be coupled to the drill bit.
  • the drill bit may define a polygonal-shaped recess and the drilling rod may include a polygonal-shaped projection, with the polygonal-shaped recess of the drill bit configured to receive the polygonal-shaped projection of the drilling rod.
  • a method of installing a friction bolt includes drilling a borehole using a drill bit coupled to a drilling rod, with the drilling rod coupled to an adapter, and installing a friction bolt simultaneously while drilling the borehole.
  • the method may further include removing the adapter and the drill rod from the friction bolt.
  • the method may further include leaving the drill bit in the borehole.
  • the friction bolt may be installed by impacting the friction bolt while drilling the borehole.
  • FIG. 1 is a perspective view of a self-drilling friction reinforcement system according to one embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of the system of FIG. 1.
  • FIG. 3 is a perspective view of a shank or adapter according to one embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of the shank or adapter of FIG. 3 showing the threads contained within and the impact area for the friction bolt.
  • FIG. 5 is a perspective view of a modified drill rod according to one embodiment of the present invention.
  • FIG. 6 is a perspective view of a friction bolt according to one embodiment of the present invention.
  • FIG. 7 A is a perspective view of a rock drill bit according to one embodiment of the present invention showing the water cut detail.
  • FIG. 7B is a further perspective view of the rock drill bit of FIG. 7A showing the rod connection.
  • FIG. 8 is a top view of the rock drill bit of FIG. 7A showing the distribution of hardened inserts, such as tungsten.
  • One embodiment of the present invention is a system that enables optimal drilling and the installation of friction bolts, which are well known and employed in the sector, in a simultaneous fashion, subsequently enabling recovery of the devices employed after the maneuver. These are the shank and the drilling rod, in order that they may be subsequently employed in the installation of more friction bolts. The only thing lost in the installation process is the drill bit responsible for breaking the rock. The system shall be described below in detail.
  • a reinforcement system including a self-drilling friction bolt, according to one embodiment is disclosed.
  • This system incorporates the typical characteristics of a friction bolt, adding to it the capability to simultaneously drill rock while it is installed, generating the work load instantaneously, and eliminating the need to drill before installing the bolt, as is currently done in the conventional installation of this type of element.
  • the system includes a shank 1, a friction bolt 2, a drilling rod 3, and a drill bit 4.
  • the shank 1 includes a first threaded portion 12 for receiving a drilling machine (not shown), a central passageway 13 to enable the necessary flow of air and water to execute drilling from the drilling machine, and a second threaded portion 14 for receiving the drilling rod 3.
  • the shank 1 further includes a neck or rabbet 11 that acts as an impact zone to be able to install the friction bolt 2.
  • the drilling rod 3 is a steel rod having a threaded portion 33 at one end that is received by the second threaded portion 14 of the shank 1 and a polygonal- shaped projection 31, such as a square-shaped projection, at the opposite end of the rod 3 that is configured to receive the drill bit 4, shown in FIG. 7B. Furthermore, the rod 3 defines a central passageway 32 along its entire length, with the goal of enabling the circulation of air or water needed in the drilling operation. The rod 3 has a diameter that allows for its insertion along the interior of the friction bolt 2, as shown in FIG. 1.
  • the friction bolt 2 is an elongate body defining a central passageway 16 and having a longitudinal slit 18 to allow the friction bolt 2 to compress upon installation, thereby securing the friction bolt 2 within a borehole via friction.
  • the rock drill bit 4 has the needed diameter to obtain a perforation or borehole in the rock, such that maximum resistance can be achieved in terms of the load by the friction bolt 2.
  • the drill bit 4 defines cavities or perforations 41 aimed at enabling the flow of air or water traveling through the system's interior, which is needed to remove the loose material generated during the drilling process.
  • the drill bit 4 has a polygonal-shaped recess 43, such as a square-shaped recess, that fits the corresponding polygonal-shaped projection 31 of the drilling rod 3.
  • the rock drill bit 4 further includes hardened material inserts 42, such as tungsten carbide, for breaking through rock. In one non-limiting embodiment, three of the inserts 42 are arranged in a wider diameter and two of the inserts 42 are arranged in the center, specifically on the flat face as shown in FIG. 8, which enables drilling through rock with the required diameter.
  • the system is used by engaging the first threaded portion 12 of the adapter or shank 1 with a drilling machine (not shown) and drilling a borehole in strata with the drill bit 4.
  • a drilling machine not shown
  • water or air may be used to clear the drilled strata via the passageway 13 of the adapter 1, the central passageway 32 of the drilling rod 3, and the cavities 41 of the drill bit 4.
  • the friction bolt 2 is simultaneously installed while the borehole is being drilled by impacting the friction bolt 2 with the neck 11 of the adapter 1.
  • the adapter 1 and the drilling rod 3 are uncoupled from the drill bit 4 and removed from the friction bolt 2.
  • the drilling rod 3 is removed from the passageway 16 of the friction bolt 2.
  • the drilling rod 3 and the adapter 1 can be subsequently used for further installations, while only leaving the drill bit 4 in the borehole.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
EP12825784.7A 2011-08-23 2012-08-22 Selbstbohrender reibrohranker Withdrawn EP2748432A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CL2011002065A CL2011002065A1 (es) 2011-08-23 2011-08-23 Sistema de fortificacion que realiza simultaneamente la perforacion e instalar pernos de fortificacion por friccion para el sostenimiento de terrenos, en el proceso de perforacion e instalacion del perno de friccion, se recupera el culatin o adaptador y la barra de perforacion, perdiendose solo la broca encargada de romper el maciso rocoso.
PCT/US2012/051852 WO2013028754A1 (en) 2011-08-23 2012-08-22 Self-drilling friction bolt

Publications (2)

Publication Number Publication Date
EP2748432A1 true EP2748432A1 (de) 2014-07-02
EP2748432A4 EP2748432A4 (de) 2016-08-10

Family

ID=50382848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12825784.7A Withdrawn EP2748432A4 (de) 2011-08-23 2012-08-22 Selbstbohrender reibrohranker

Country Status (7)

Country Link
US (1) US20140154017A1 (de)
EP (1) EP2748432A4 (de)
AU (1) AU2012298905B2 (de)
CA (1) CA2846097A1 (de)
CL (1) CL2011002065A1 (de)
WO (1) WO2013028754A1 (de)
ZA (1) ZA201309390B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013126688A1 (en) 2012-02-22 2013-08-29 Fci Holdings Delaware, Inc. Fiberglass roof and rib plate
WO2015072839A1 (es) * 2013-11-15 2015-05-21 Aguilar Vera Oscar Octavio Zanco minero para ancla de tubo
KR101471486B1 (ko) * 2014-02-04 2014-12-10 삼진스틸산업(주) 회전을 이용한 제거식 그라운드 앵커체
AU2016245331B2 (en) * 2015-04-10 2021-05-20 DSI Underground Australia Pty Limited Improved drilling assembly comprising a friction bolt
WO2017219134A1 (en) 2016-06-21 2017-12-28 Alert Technologies Inc. Sensing device for a rock bolt

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025875A (en) * 1990-05-07 1991-06-25 Ingersoll-Rand Company Rock bit for a down-the-hole drill
AUPQ009799A0 (en) * 1999-04-30 1999-05-27 Raers Corporation Pty Ltd Drilling apparatus and method for single pass bolting
DE50207438D1 (de) * 2001-04-26 2006-08-17 Alwag Tunnelausbau Gmbh Verfahren und vorrichtung zum bohren eines loches und zum festlegen einer verankerung in einem bohrloch
WO2007053893A1 (en) * 2005-11-09 2007-05-18 Sandvik Intellectual Property Ab Self drilling rock bolt
CA2665474A1 (en) * 2006-11-15 2008-05-22 Sandvik Intellectual Property Ab A rock bolt and an anchoring device
AU2008341002A1 (en) * 2007-12-21 2009-07-02 Alminco Pty Ltd Self drilling rock bolting

Also Published As

Publication number Publication date
WO2013028754A1 (en) 2013-02-28
CA2846097A1 (en) 2013-02-28
AU2012298905B2 (en) 2015-02-05
EP2748432A4 (de) 2016-08-10
AU2012298905A1 (en) 2013-05-02
US20140154017A1 (en) 2014-06-05
CL2011002065A1 (es) 2011-10-28
ZA201309390B (en) 2015-09-30

Similar Documents

Publication Publication Date Title
US10767480B2 (en) Extensible reaming self-anchoring anchor rod and supporting method thereof
US20140154017A1 (en) Self-drilling friction bolt
KR100820642B1 (ko) 사면보강공사용 앵커네일 및 이를 이용한 사면보강공법
US20080038068A1 (en) Rock bolt
CN103643977A (zh) 一种全锚分区让压注浆锚杆及其使用方法
KR20080038276A (ko) 토양 또는 암반 물질내에 홀을 드릴링, 특히 충격식 드릴링또는 회전 충격식 드릴링하기 위한 장치 및 방법
US6457909B1 (en) Multi-purpose anchor bolt assembly
US9732614B2 (en) Device, method and system for loading fixatives for rock bolts
RU2278941C2 (ru) Способ и устройство для бурения скважины и фиксации анкерной крепи в буровой скважине
AU2015201268A1 (en) Self-drilling friction bolt
JP2007063882A (ja) 拡張ボアホールに取り付けた高耐荷力アンカー構造
EP3000963B1 (de) Minenstützanordnung zur Verankerung in einem Bohrloch in Form eines verbesserten Felsankers
AU2016100070A4 (en) Grout Anchored Rock Bolt
US8696249B2 (en) Rock bolt and rock bolt component
KR100448037B1 (ko) 사면보강공사용 소일네일구조체 및 사면보강공사용 소일네일링 공법
WO2013104019A1 (en) A combination tool for installing and tensioning a cable bolt
KR101017183B1 (ko) 피에스 강연선을 이용한 앵커 조립체 및 그를 이용한 지반보강방법
US20160237819A1 (en) Rib Strap
CN210164493U (zh) 一种锚杆
CN208236329U (zh) 自攻旋进锚杆端锚结构用的打孔钻具
KR200329408Y1 (ko) 사면보강공사용 네일앵커
KR101241404B1 (ko) 압축과 인장형 록볼트 및 이를 이용한 지반 보강 공법
KR101286937B1 (ko) 지반보강장치
CN108468559A (zh) 自攻旋进锚杆的端锚固方法及配套打孔钻具
KR200349108Y1 (ko) 사면보강공사용 네일앵커

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140206

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
RA4 Supplementary search report drawn up and despatched (corrected)

Effective date: 20160713

RIC1 Information provided on ipc code assigned before grant

Ipc: E21D 21/00 20060101AFI20160707BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170209