AU2018241169B2 - A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth - Google Patents
A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth Download PDFInfo
- Publication number
- AU2018241169B2 AU2018241169B2 AU2018241169A AU2018241169A AU2018241169B2 AU 2018241169 B2 AU2018241169 B2 AU 2018241169B2 AU 2018241169 A AU2018241169 A AU 2018241169A AU 2018241169 A AU2018241169 A AU 2018241169A AU 2018241169 B2 AU2018241169 B2 AU 2018241169B2
- Authority
- AU
- Australia
- Prior art keywords
- hole
- cord
- vessel
- depth
- measuring
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000005259 measurement Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 14
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims description 12
- 230000001133 acceleration Effects 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 1
- 238000013268 sustained release Methods 0.000 abstract description 3
- 239000012730 sustained-release form Substances 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 7
- 238000005553 drilling Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007717 exclusion Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 241000270349 Iguana Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
Abstract
A portable and disposable apparatus for rapidly measuring the depth of blast holes
and water levels including a disposable vessel filled with material to weight the vessel.
The vessel adapted to lowered into a blast hole at the end of a cord from means to
dispense the cord and record the depth at which water in the hole or the bottom of the
hole, causes immediate deceleration of the vessel and the temporary and/or sustained
release of tension in the cord and wherein, the cord is cut post measurement and
disposed of with the vessel in the hole.
Description
The invention relates to the mining and construction industry and is particularly but not limited to a portable and disposable apparatus for rapidly measuring the depth and water levels of blast holes primarily concerned with drilling and mining operations.
Reference to cited material or information contained in the text should not be understood as a concession that the material or information was part of the common general knowledge or was known in Australia or any other country. Further, each document, reference, patent application or patent cited in this text is expressly incorporated herein in their entirety by reference, which means that it should be read and considered by the reader as part of this text. That the document, reference, patent application, or patent cited in this text is not repeated in this text is merely for reasons for conciseness.
Prior art measurement of blast hole depth after drilling has been completed is performed by feeding a measuring line into the hole. For blast holes depth measurement it is normal practice to use a tape measure with a weight attached to the end of the tape. Both total hole depth and water depth are recorded in addition to assigning the hole an identification number. This process in known as "dipping" and is a two or more person task with as many as two thousand holes being dipped for a single blast. One or more persons is required to operate the tape measure while another person records the measurements. This information is used to determine if the hole has collapsed and the type of explosives to be used for the particular hole.
The use of non "weight on a string" solutions are fraught with difficulties due to the hole's relatively narrow diameter, non vertical orientation, the coarse and irregular surfaces of the hole and the muddiness of water in the hole. These are major challenges that have eliminated a number of potential technologies in the
1A application to bore hole measurement. Examples of which include the small hole diameter limiting ability for ultrasound to propagate, muddy water preventing penetration of laser light, non vertical and non straight holes causing instruments lowered into hole to be caught on the wall of the hole and mud clogging up instruments that are dropped and recovered from the hole.
Furthermore the requirement of a number of operators using current methods to dip
a bore hole is a costly expense, Prior art equipment is alsolimited in its application
and the presence of mud in the bottom of blast holes can dilute blasting agents
causing misfires or low order detonation. There is therefore a need for a portable
and disposable one man operable device that may also include a facility to
penetrate and recover a sample of mud that may be at the bottom of the hole.
Some examples of the prior art include devices disclosed in WO 2011/047440 Al
(IGUANA INDUSTRIAL SOLUTIONS PTY.LTD,) and CN 202109869 U (INNER
CN 202109869 U is a utility model patent that discloses a simple plumb bob
suspended on a wire rope to measure the depth of a blast hole. There also appears
to be some facility to measure water levels in the blast hole, however this involves
replacing the plumb bob with a special water height detection probe of less density
than water. It does not appear to be a disposable device.
WO 2011/047440 Al discloses a highly specialised device on which a line with a
weight is released and retracted on a rotatable reel and wherein the line is fed
through a hollow elongate leader. The measurement of blast hole water level is via
2.
a float assembly movable relative to the line. The line carries a weight which pulls the line through the float. The float includes a float sensor, a reed switch for detecting when a magnet on the weight is in close proximity to or is separated from the float. Essentially, this device is a complex electronic apparatus which relies on the distance between the magnet and the sensor to obtain depth measurements. Unlike the device of CN 202109869 U, there is no requirement to replace the weigh and float arrangement with a special water height detection probe, however in common with CN 202109869 U, it is also not a disposable device.
Embodiments of the present invention seek to ameliorate or eliminate one or more limitations or disadvantages of the prior art by providing a portable and disposable apparatus for rapidly measuring the depth of blast holes and water levels and to provide the public with a useful choice.
In one aspect, the invention resides in a portable and disposable apparatus for rapidly measuring the depth of blast holes and water levels in the same including in combination:
a disposable vessel adapted to be filled with a material to weight the vessel;
the vessel adapted to be lowered into a blast hole at the end of a cord;
the vessel having a wide base wherein contact with water in the hole causes immediate deceleration of the vessel and temporary release of tension in the cord, and wherein contact with the bottom of the hole causes a sustained release of tension in the cord; cord length measuring and dispensing means to dispense the cord and record/measure the depth at which water in the hole or the bottom of the hole, causes immediate deceleration of the vessel and the temporary and/or sustained release of tension in the cord; and wherein, the dispensed cord is cut post measurement and disposed of with the vessel in the hole and a replacement vessel is attached to the end of the freshly cut cord for measuring the next blast hole.
Preferably, the cord length measuring and dispensing means comprises:
a spool on which the cord is wound and unwound;
the spool adapted to release the cord vertically into a blast hole;
a magnetic brake and measurement pulley assembly in contact with the cord to determine the length of the cord unwound from the spool wherein deceleration of the vessel and release of tension in the cord is detected as a measurement of depth.
Preferably, the vessel is a disposable plastic vessel adapted to be filled with drill cuttings usually comprising rocks to weight the vessel.
Preferably, the vessel has a substantially frusta-conical shape with a flat base wherein contact with water in the hole causes immediate deceleration of the vessel.
Preferably, the vessel has a concave or a cup-shaped base wherein on contact with water in the hole, the configuration of the base causes immediate deceleration of the vessel.
In a preferred example, the vessel may also include a disposable mud sampling spear to sample and measure the depth of mud in the bottom of the hole wherein the cord is retracted to record the mud sample and depth measurements before cutting and disposing of the cord and vessel in the hole.
Preferably, the cord is a disposable cord such as fishing line but may be of another suitable disposable material.
Preferably, there is a global positioning system (GPS) associated with the apparatus to identify the location of the blast hole.
Preferably, there is computer recording means to record the GPS position and depth of the water level and the blast hole measured by the apparatus.
Preferably, depth information from the cord length measuring and dispensing means and GPS information is data logged on the computer recording means via keyboard or may be semi automated by pressing a button on a programmable logic controller (PLC) device.
According to another aspect there is provided a method of measuring the depth of blast holes and water levels using the apparatus hereinabove described including the steps of:
(a) lowering a weighted vessel attached to a cord from the cord length measuring and dispensing means into a blast hole;
(b) measuring the length of the cord released from the cord length measuring and dispensing means as a measurement of depth;
(c) recording via computer recording means the depth at which the vessel comes into contact with any water or when the vessel bottoms at the base of the hole. together with the GPS location of the blast hole;
(d) taking a mud sample from the bottom of the blast hole if the vessel includes a mud sampling spear;
(e) cutting and disposing of the dispensed cord and the vessel in the hole, and
(f) attaching a replacement vessel to the end of the freshly cut cord for measuring the next blast hole.
In order that the invention be better understood and put into practise, reference is made to the accompanying drawings wherein:
Figure 1 illustrates the uploading of hole identification numbers to the computer recording means.
Figure 2 illustrates the use of GPS to find hole numbers in the vicinity of the apparatus.
Figure 3 illustrates a disposable plastic vessel filled with drill cuttings and attached
to the cord.
Figure 4 illustrates the spool and cord measuring assembly
Figure 5 illustrates locating water in the blast hole.
Figure 6 illustrates locating the bottom of the blast hole.
Figure 7 illustrates cutting and recovery of the cord.
According to the present invention the method provides for recording a hole
identification number for the depth of the hole measured. The method may include
all hole numbers being recorded in the computer recording means at some time
earlier. The apparatus preferably has an inbuilt Global Position System (GPS) that
is used to determine the hole identifications numbers that are in close proximity to
the apparatus itself. The operator can preferably not only identify but also select
the appropriate identification number of the hole to be measured,
The operator takes a disposable plastic vessel prior filled with heavy material or fills
the vessel with drill cuttings. Drill cuttings are rock fragments that are produced
during drilling and normally deposited at the top of the hole. The invention utilises
a disposable cord such as fishing line but it can be another material that is attached
to the plastic vessel using a plastic clip. The method of attachment for the reusable
vessel is by preferably by wrapping the cord around two offset plastic clips and for
the disposable vessel is by wrapping the cord around the clip and pushing the clip
into holes that have been previously made in the wall of the plastic vessel. An
additional option is a sampling spear attached to the base of the plastic vessel. This spear is preferably 400mm in length and penetrates and retains a sample of mud that may be in the bottom of the hole.
The plastic vessel is dropped into the hole with the operator periodically pulling up
on the cord to prevent/or clear the vessel being lodged on the wall of the hole.
When the vessel hits water the operator will observe a sudden decrease in
acceleration of the vessel due to the shape of its base (e.g. such as in the case of
a flat or concave base, the vessel is instantly stopped by the water surface) and the
operator holds the line and may move the cord up and down to confirm the vessel
is at the top of the water. Where the apparatus is semi-automated in operation by
a PLC device, a button is pressed to cause the invention to record the length of cord
to the surface of the water. Naturally the vessel will become infiltrated with water
over a period of time and begin to sink to the bottom of the hole with the tension in
the cord gradually returning. The vessel is released by the operator and the pulling
up procedure is repeated until the vessel settles on the bottom of the hole wherein
the release of tension is sustained. Again a button is pressed to record the length
of cord. The apparatus calculates the total hole depth and water depth using the
measurements of the cord and stores this information and the particular hole
identification number as located by the GPS. At some later time the data is
downloaded from the computer recording means to drilling reporting software,
When a disposable plastic vessel is used, on completion of each measurement, the
cord is cut and left in the hole with the plastic vessel. In cases where a reusable
plastic vessel is used the cord is recovered using a fast rotating spool and then
discarded on the surface adjacent to the hole.
When the plastic vessel is recovered and the sampling spear is present the operator
can also identify and measure the depth of mud in the bottom of the hole
A more detailed description will now be provided with reference to the
accompanying figures. It will be appreciated that the detailed description is
intended to provide details of preferred features of the invention and should not be
construed as limiting on the invention in any way. In the drawings
Figure 1 illustrates the uploading ofholeidentification numberstothecomputer
recording means. A computer 10 holds a file containing the unique hole
identification number and the GPS location coordinates for the hole. The file is
transmitted to the apparatus 12 of the invention and stored in the computer
recording means.
Figure 2 illustrates the use of GPS to find hole numbers in the vicinity of the
apparatus 12. The accuracy of the GPS location is limited and current technology
does not allow sufficient resolution to identify individual holes 14, 16, 18, 20;
consequently the invention uses a local and internal GPS receiver to determine
current hole location. Preferably, all hole identification numbers within ten metres
of this location are displayed. The operator selects the hole identification number
of the hole to be measured.
Figure 3 illustrates a disposable plastic vessel 22 filled with drill cuttings 24 and
attached to the cord 26. To remove the necessity to carry weights that are required
for the vessel to be dropped into a hole, alight weight plastic vessel is used for this
purpose. The vessel is filled with drill cuttings and attached to the cord using a plastic clip 28. The vessel is filled with heavy material and preferably sealed. The preferred method of attachment is by wrapping the cord around two plastic clips located on opposite sides of the vessel.
Figure 4 illustrates the spool and cord measuring assembly. The cord 26 is stored
inside the invention on a spool 30 and is threaded through a magnetic
brakelmeasurement pulley assembly 32. The brake ensures the measurement
assembly is always in contact with the cord to provide length measurement when
the immediate deceleration of the vessel and release of tension in the cord is
detected as a measurement of depth.
Figure 5 illustrates locating water 34 in the blast hole. Gravity causes the vessel 22
filled with cuttings to fall towards the bottom of the hole 36. The operator maintains
alight grip on the cord 26 as it is fed into the hole Theoperator moves the cord up
and down if the cord stops moving to ensure the vessel has not lodged on the side
of the hole. When the vessel meets the water surface itwith stop momentarily due
the resistance of the flat bottom 22a of the vessel 22 before penetrating the water
surface 34a. The operator will hold and pull and drop the cord to confirm the water
surface 34a and press a button on a PLC device (not shown) of the invention to
indicate the cord is at the water surface.
Figure 6 illustrates locating the bottom of the blast hole. After the water surface 34a
has been recorded the operator releases the cord 26 and repeats the procedure
wherein a button is pressed to identify the vessel 22 is at the bottom of the hole 36.
If no water is present both a water level button and hole bottom button (both not
I1 shown) are pressed at the bottom of the hole 36 and the water depth is recorded as zero.
Figure 7 illustrates cutting of the cord. In most cases the cord 26 will be cut at surface and left in the hole 36, However it may be required to remove the vessel 22 and the cord from the hole such as for mud sampling. In this case the cord can be recovered by winding up onto a spool 40 preferably by a tool such as a high speed battery powered drill (not shown).
Whilst preferred embodiments of the present invention have been herein before described, the scope of the present invention is not limited to those specific embodiments, and may be embodied in other ways, as will be apparent to a skilled addressee. Modifications and variations such as would be apparent to a skilled addressee are deemed to be within the scope of the present invention.
Throughout this specification, unless the context requires otherwise, the word "comprise" and variations such as "comprises" and "comprising" will be understood
to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.
Throughout this specification, unless the context requires otherwise, the word "include" and variations such as "includes" and "including" will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.
Claims (14)
1. A depth measurement apparatus for measuring the depth of a hole and/or the depth of
any water or mud in the hole, the depth measurement apparatus comprising:
a spool containing a length of cord;
a vessel attached to a free end of the cord remote from the spool;
a measuring device being arranged to measure a length of the cord dispensed
from the spool during use, the measuring device further being arranged to measure an
acceleration rate at which the cord is dispensed from the spool during use,
whereby, in use, measuring the length of the cord dispensed from the spool at a
first instance of change in the acceleration rate is indicative of a depth of the water
surface or mud surface in the hole, and measuring the length of the cord dispensed
from the spool at a second instance of change in the acceleration rate is indicative of a
depth of the bottom of the hole.
2. The apparatus according to claim 1, wherein the vessel is a disposable vessel adapted
to be filled with a heavy material to weight the vessel;
3. The apparatus according to claim 2, wherein the vessel is adapted to be filled with drill
cuttings comprising rocks to weight the vessel.
4. The apparatus according to any one of the preceding claims, wherein the vessel has a
substantially frusta-conical shape with a flat base wherein the flat base is configured to
cause immediate deceleration of the vessel when the vessel is lowered into the hole
and comes into contact with water in the hole.
5. The apparatus according to any one of the preceding claims, wherein a sampling spear
is attached to the vessel and wherein the sampling spear is configured to measuring
the depth of mud in the bottom of the hole and retain a sample of mud for extraction
from the hole.
6. The apparatus according to any one of the preceding claims, wherein the spool is
configured to rotate for recovering the dispensed weight and the sample spear.
7. The apparatus according to any one of the preceding claims, which comprises a
magnetic brake and pulley assembly that are in contact with the cord and configured to
determine the length of the cord unwound from the spool.
8. The apparatus according to any one of the preceding claims, wherein the cord is a
disposable cord.
9. The apparatus according to any one of the preceding claims, which comprises a global
positioning system (GPS) associated with the apparatus to identify a location of the
hole.
10. The apparatus according to claim 9, which comprises a computer recording means to
record the GPS position and depth of the water level and depth of the hole measured
by the apparatus.
11. The apparatus according to claim 10, which comprises a keyboard or button associated
with a programmable logic controller (PLC) device, wherein depth information from the
cord length measuring and dispensing means and GPS information is data logged on
the computer recording means .
12. A method of measuring the depth of a hole and/or the depth of any water or mud in the
hole, the method comprising the steps of:
attaching a vessel to a cord;
dropping the vessel into the hole so that the vessel can descend into the hole
and come to rest at a bottom of the hole;
measuring an acceleration rate at which the cord is dispensed from the spool;
measuring the length of the cord dispensed from the spool at a first instance of
change in the acceleration rate when the vessel experiences immediate deceleration
when contacting the water surface or mud surface in the hole, and measuring the
length of the cord dispensed from the spool at a second instance of change in the
acceleration rate when the vessel comes to rest at the bottom of the hole, wherein
measuring the length of the cord at the first and second instances is determined when
there is a release of tension in the cord; and
pulling the cord up and down to confirm contact with the water surface or mud
surface and the bottom of the hole.
13. A method as claimed in claim 18, wherein the pulling of the cord up and down ensures
the vessel is not lodged on the side of the hole.
14. The apparatus according to any one of the preceding claims wherein, the dispensed
weight is cut post measurement and disposed of with the weight in the hole and a
replacement weight is attached to the end of the freshly cut cord for measuring the next
hole.
This data, for application number 2014336947, is current as of 2018-10-04 21:00 AEST
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2018241169A AU2018241169B2 (en) | 2013-10-17 | 2018-10-05 | A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2013903997A AU2013903997A0 (en) | 2013-10-17 | A method and system for rapid measurement of the depth of blast holes. | |
| AU2013903997 | 2013-10-17 | ||
| AU2014336947A AU2014336947B2 (en) | 2013-10-17 | 2014-09-16 | A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth |
| PCT/AU2014/000913 WO2015054720A1 (en) | 2013-10-17 | 2014-09-16 | A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth |
| AU2018241169A AU2018241169B2 (en) | 2013-10-17 | 2018-10-05 | A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2014336947A Division AU2014336947B2 (en) | 2013-10-17 | 2014-09-16 | A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2018241169A1 AU2018241169A1 (en) | 2018-11-08 |
| AU2018241169B2 true AU2018241169B2 (en) | 2020-07-16 |
Family
ID=52827443
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2014336947A Ceased AU2014336947B2 (en) | 2013-10-17 | 2014-09-16 | A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth |
| AU2018241169A Ceased AU2018241169B2 (en) | 2013-10-17 | 2018-10-05 | A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2014336947A Ceased AU2014336947B2 (en) | 2013-10-17 | 2014-09-16 | A portable and disposable apparatus and method for rapid measurement of water level and blast hole depth |
Country Status (2)
| Country | Link |
|---|---|
| AU (2) | AU2014336947B2 (en) |
| WO (1) | WO2015054720A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018102864A1 (en) * | 2016-12-05 | 2018-06-14 | Qmr (Ip) Pty Ltd | A depth measurement apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011047440A1 (en) * | 2009-10-23 | 2011-04-28 | Iguana Industrial Solutions Pty Ltd | Depth determination apparatus |
| CN202109869U (en) * | 2011-07-05 | 2012-01-11 | 内蒙古康宁爆破有限责任公司 | Deep-hole blasting hole depth measuring apparatus |
-
2014
- 2014-09-16 AU AU2014336947A patent/AU2014336947B2/en not_active Ceased
- 2014-09-16 WO PCT/AU2014/000913 patent/WO2015054720A1/en active Application Filing
-
2018
- 2018-10-05 AU AU2018241169A patent/AU2018241169B2/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011047440A1 (en) * | 2009-10-23 | 2011-04-28 | Iguana Industrial Solutions Pty Ltd | Depth determination apparatus |
| CN202109869U (en) * | 2011-07-05 | 2012-01-11 | 内蒙古康宁爆破有限责任公司 | Deep-hole blasting hole depth measuring apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2018241169A1 (en) | 2018-11-08 |
| AU2014336947B2 (en) | 2018-07-05 |
| AU2014336947A1 (en) | 2016-06-02 |
| WO2015054720A1 (en) | 2015-04-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |