Title of Invention

DEVICE FOR ROCK BOLTING AND FOR AUTOMIZED ROCK BOLTING AND ROCK BOLTING

Abstract Device for rock bolting with an adapter device (10) for ttJiuiecliyn of a drilling machine (3) Do 3 self drilling rock boll (7), said adapter device including an adapter element (14) which is scalingly surrounded by a swivel sleeve (13) foj connection 10 (one) external (source) sources for flushing medium (8) and boll grouting medium (9). wherein the adapter element includes a thread Cor connecting to a corresponding thread on the rock boll (7) and an integral connection portion for connection to the driling machine (3). The invention also concerns a device for automatized roefc bolting artd a method for rock bolting.
Full Text FIELD OF THE INVENTION
The invention concerns—a-device for rock bolting according to
the preamble oft claim 1 afid a device for automatized rock
bolting according to the preamble of (claim 4.)The invention
also concerns a method for rock bolting.
DESCRIPTION OF BACKGROUND ART
The use of self-drilling rock bolts provides a rational
procedure since the bore hole, into which the rock bolt is
intended to bee inserted, is formed with the rock bolt itself
as a drilling tool. After the drilling step a bolt grouting
medium such as cement is injected into the bore hole for
grouting the rock bolt for rock reinforcement purposes etc.
During the boring step the drilling area is flushed with
pressurized air or with a flushing fluid which is
alternatively flushed during the drilling step as a thin
flowing cement which also serves for grouting purposes.
Such flushing can be continuous and results in a better
penetration of the cement into the rock surrounding the bore
hole and consequently better anchoring of the bolt.
A previously known device for rock bolting includes a swivel
device which is screwed onto the neck adapter of the drilling
machine. The other end of the swivel device provides a thread
for receiving a threaded end of a self drilling rock bolt.

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This previously known device is used for manually controlled
rock bolting and requires monitoring by an operator when
loosening the drilled-in rock bolt from the swivel device.
AIM AND MOST IMPORTANT FEATURES OF THE INVENTION
It is an aim with this invention to provide an improvement of
the device according to the background art and in particular
to provide a device which allows entirely automatized rock
bolting including jointing of a self drilling rock bolt.
These aims are obtained trough the features of'claim 1.
Hereby is achieved that unfastening of the adapter element
will occur in a defined manner between that element and the
rock bolting question or the extension rod. This is a
considerable advantage, since hereby the unfastening procedure
is essentially simplified compared to the background art and
since use with automatized rock bolting is allowed.
A corresponding device for automatized rock bolting is defined
in claim 4, wherein the corresponding advantages are achieved.
Also the method according to claim 5 brings about the
corresponding advantages.
Further features and advantages will be evident from the
following.
BRIEF DESCRIPTION OF DRAWINGS
The invention will now be described to the background of an
embodiment and with reference to annexed drawings, wherein:

WO 2004/099568 PCT/SE2004/000730
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Fig. 1 diagrammatically shows a device for automatized rock
bolting including a drill rig, and
Fig. 2 shows in greater detail a device for rock bolting
according to the invention.
DESCRIPTION OF EMBODIMENT
A device 1 for automatized rock bolting with self drilling
rock bolts includes a drilling rig 2 having means for
supporting a conventional drilling machine 3 which is
reciprocally movable on a longitudinal guide 4. A storage
facility for rock bolts and/or jointing rods for rock bolts is
indicated with 5.
Along a guide 4 there are provided drills supports 6 for
supporting a self drilling rock bolt 7 with possible thread
joined jointing rod in the drilling process.
The storage facility and the drill supports functions in
general like ones that are provided in conventional devices
for automatized drilling and are therefore not described more
detailed here.
A source for flushing medium 8 is over conduits and an adapter
device 10 arranged to communicate with the self drilling rock
bolt 7 for flushing during drilling a bore hole for the rock
bolt at a determined location into the rock structure to be
reinforced.
A source for bolt grouting medium 9 for injecting cement or
corresponding grouting medium is also arranged to communicate
with the rock bolt 7 over the adapter device 10. This can be
accomplished by feeding this medium continuously during the

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drilling process as flushing medium/injection medium or after
termination of the drilling process as conventional grouting
medium.
The device for rock bolting 10 is shown in more detail on Fig.
2 as an adapter device 10, whereby is evident that the device
includes a longitudinal adapter element 14 having a distal end
11 for connection to a self drilling rock bolt and a proximal
end 12 comprising an integral connection portion of the
adapter element 14 for cooperation with a conventional rock
drilling machine 3.
According to the invention is hereby intended that the adapter
element including the connection portion is comprised of one
single integral element which is manufactured in one piece.
This results in that this element withstands the loads that
the shock wave causes in percussion drilling. Hereby a real
possibility of automatizing the bolting process is provided.
A swivel sleeve 13 is arranged surrounding a portion of the
adapter element 14, rotationally fixed, fastened to the
drilling machine 3 over a rotation preventing arm 17. This
element is on the one hand fastened to the drilling machine 3
and provides on the other hand means in form of a ring-shaped
end portion for cooperation with a connection' nipple 16
extending radially from the swivel sleeve 13. The swivel
sleeve is thereby arranged non-rotational with respect of the
drilling machine.
The connection nipple 16 is intended to be connected to either
of the sources 8 or 9 in Fig. 1 for flushing and injection of
grouting medium respectively. As an alternative, there could

WO 2004/099568 PCT/SE2004/000730
5
of course be arranged two connection nipples, one for
communication with each source.
The swivel sleeve 13 provides sealings 15 on each side of an
annular space 18, surrounding a portion of the adapter element
14, wherein a radial channel 19 (can be more than one)
debouches. The channel 19 connects the space 18 with an axial
channel 20 which debouches in the inside of a recessed portion
for a self drilling rock bolt at the distal end of the adapter
element 14. This way medias from the sources 8 and 9 in Fig. 1
will be transmitted to a rock bolt which is inserted into the
recessed portion.
A method for rock bolting according to the invention is as
follows:
STEP 1
In a recessed portion in an adapter device which is inserted
into a drilling machine there is connected a self drilling
rock bolt to be driven-in and anchored.
STEP 2
The drilling step proceeds as usual with the difference that
flushing of the area of a drill bit of the self drilling rock
bolt is not flushed over the drilling machine itself but over
the adapter device, which is either connected to a flushing
medium source or to a light flowing cement which
simultaneously flushes and grouts.
STEP 3
After having driven-in the self drilling rock bolt passed a
front drill support on the drilling machine guide, the
rotational direction of the drilling machine 3 is reversed for

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loosening the thread engagement between the female thread on
the distal end of the adapter element and the rock: bolt. The
rock bolt is now free to be used as rock reinforcement or to
be jointed with a jointing rod and be drilled-in further.
STEP 4
The drilling machine 3 is reversed in order to alternatively
be in a position to cooperate with a jointing rod if this is
necessary for insertion of a sufficiently long rock bolt,
whereby after having been driven-in, cement is injected in a
manner indicated above. This injection step is also applicable
in case the rock bolt was ready to use already after step 2
and cement (or the like) has not been used for flushing.
The advantages achieved through the invention could be
summarised as follows:
No loose coupling has to be handled since the rock bolt will
always become unfastened from the adapter element because of
the presence of only one thread joint.
Continuous cement injection can be made during drilling.
The bolt is installed in one single operation since injection
of the cement does not require connecting of a separate pump
to the bolt.
Completely mechanised/automatized installation of self
drilling bolts can be realized according to the invention and
with the aid of a bolt storage facility.


The Swedish Patent Office
PCT International Application PCT/SE2004/000730
30-03-2005
7
CLAIM
1. Device for rock bolting with an adapter device (10) for
connection of a drilling machine (3) to a self drilling rock
bolt (7), said adapter device including an adapter element
(14) which is sealingly surrounded by a swivel sleeve (13)
that is arranged for connection of an axial channel through
the adapter device (20), which in operation cooperates with an
axial flushing channel in the rock bolt, to (one) external
(source)sources for flushing medium (8) and bolt grouting
medium (9), wherein the adapter element (14) at a distal end
(11) includes a thread for connecting to a corresponding
thread on the rock bolt (7),
characterized in
- that the adapter element (14) at a proximal end (12)
includes an integral connection portion for connection to the
drilling machine (3),(whereby the adapter element including
the connection portion is comprised of one single integral
element in one piece.
2. Device according toj claim 1, characterized in
that the thread on the adapter element is a female thread and
that the thread on the rock bolt is a male thread.
3. Device according to claim 1 or. 2,
characterized in that the swivel sleeve (13) has
an essentially radially extending connection nipple (16), for
flushing medium, bolt grouting medium, which is arranged for
cooperation with a rotational preventing arm (17), which is
arranged to be fastened to the drilling machine.
4. Device according to claim 1, 2 or 3, wherein it is arranged
to be used in automatized rock bolting,

T
he Swedish Patant Office
PCT International Application PCT/SE2004/000730
30-03-2005
8
characterized in that the adapter element has a
length that exceeds a distance between the drilling machine
(3) in its most advanced position and a front drill support
(6) for a rock bolt (7) to be driven in.
5. Device (1) for automatized rock bolting with self drilling
rock bolts and including a drilling machine {3). which is
reciprocal on a guide (4), a rock bolt storage facility (5)
for self drilling rock bolts (7), (one) external (source)
sources for flushing medium (8) and bolt grouting medium (9),
bore support for a rock bolt which is in a position to be
driven in, including a device (7) for rock bolting according
to any of the claims 1-4.
6. Method for rock bolting with self drilling rock bolts,
wherein a drilling machine (3) drives a rock bolt during
simultaneous flushing with a flushing medium and injection
with bolt grouting medium respectively over an adapter device
(10), which includes an adapter element (14) that is sealingly
surrounded by a swivel sleeve (131, wherein the adapter device
(10) is threaded to the rock bolt to be driven in, wherein the
adapter element (14) is connected to the drilling machine (3)
by means of an integral connection portion at a proximal end
(12), whereby the adapter element including the connection
portion is comprised of one single integral element in one
piece, and wherein the adapter device is unfastened from its
engagement with the rock bolt by rotationally reversing the
drilling machine.

Device for rock bolting with an adapter device (10) for ttJiuiecliyn of a drilling machine (3) Do 3 self drilling rock
boll (7), said adapter device including an adapter element (14) which is scalingly surrounded by a swivel sleeve (13) foj connection
10 (one) external (source) sources for flushing medium (8) and boll grouting medium (9). wherein the adapter element includes a
thread Cor connecting to a corresponding thread on the rock boll (7) and an integral connection portion for connection to the driling
machine (3). The invention also concerns a device for automatized roefc bolting artd a method for rock bolting.

Documents:

02020-kolnp-2005-abstract.pdf

02020-kolnp-2005-claims.pdf

02020-kolnp-2005-description complete.pdf

02020-kolnp-2005-drawings.pdf

02020-kolnp-2005-form 1.pdf

02020-kolnp-2005-form 3.pdf

02020-kolnp-2005-form 5.pdf

02020-kolnp-2005-international publication.pdf

2020-KOLNP-2005-(04-06-2012)-CORRESPONDENCE.pdf

2020-KOLNP-2005-(04-06-2012)-FORM-27.pdf

2020-KOLNP-2005-(25-04-2012)-CORRESPONDENCE.pdf

2020-KOLNP-2005-(25-04-2012)-FORM-27.pdf

2020-kolnp-2005-assignment 1.1.pdf

2020-KOLNP-2005-CORRESPONDENCE 1.1.pdf

2020-KOLNP-2005-CORRESPONDENCE-1.2.pdf

2020-KOLNP-2005-CORRESPONDENCE.pdf

2020-kolnp-2005-examination report 1.1.pdf

2020-KOLNP-2005-FORM 1 1.1.pdf

2020-KOLNP-2005-FORM 1.pdf

2020-kolnp-2005-form 18.1.pdf

2020-kolnp-2005-form 3.1.pdf

2020-kolnp-2005-form 5.1.pdf

2020-KOLNP-2005-FORM-27.pdf

2020-kolnp-2005-gpa 1.1.pdf

2020-kolnp-2005-granted-abstract 1.1.pdf

2020-kolnp-2005-granted-claims 1.1.pdf

2020-kolnp-2005-granted-description (complete) 1.1.pdf

2020-kolnp-2005-granted-drawings 1.1.pdf

2020-kolnp-2005-granted-form 1.1.pdf

2020-kolnp-2005-granted-form 2.1.pdf

2020-kolnp-2005-granted-specification 1.1.pdf

2020-KOLNP-2005-OTHERS 1.1.pdf

2020-KOLNP-2005-OTHERS.pdf

2020-kolnp-2005-reply to examination report 1.1.pdf

abstract-02020-kolnp-2005.jpg


Patent Number 249830
Indian Patent Application Number 2020/KOLNP/2005
PG Journal Number 46/2011
Publication Date 18-Nov-2011
Grant Date 15-Nov-2011
Date of Filing 14-Oct-2005
Name of Patentee ATLAS COPCO ROCK DRILLS AB
Applicant Address S-701 91 OREBRO
Inventors:
# Inventor's Name Inventor's Address
1 OBERG, FREDRIK EYRAGATAN 30, SE-702 25 OREBRO
2 JONSON, PER OSKARSTORGET 3, S-702 14 OREBRO
PCT International Classification Number E21D 20/00
PCT International Application Number PCT/SE2004/000730
PCT International Filing date 2004-05-12
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 0301375.2 2003-05-12 Sweden