EP2877697A1 - Hyper-pressure pulse excavator - Google Patents
Hyper-pressure pulse excavatorInfo
- Publication number
- EP2877697A1 EP2877697A1 EP13823572.6A EP13823572A EP2877697A1 EP 2877697 A1 EP2877697 A1 EP 2877697A1 EP 13823572 A EP13823572 A EP 13823572A EP 2877697 A1 EP2877697 A1 EP 2877697A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hyper
- nozzle
- pressure
- water cannon
- pressure water
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000012530 fluid Substances 0.000 claims abstract description 32
- 239000011435 rock Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims description 15
- 230000007423 decrease Effects 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 2
- 229920000642 polymer Polymers 0.000 claims 1
- 238000010926 purge Methods 0.000 claims 1
- 238000009412 basement excavation Methods 0.000 abstract description 16
- 238000005065 mining Methods 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000002360 explosive Substances 0.000 description 11
- 239000000499 gel Substances 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 238000009532 heart rate measurement Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 240000002114 Satureja hortensis Species 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 230000035485 pulse pressure Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/12—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
Definitions
- the present invention relates to non-explosive mining techniques for mining operations.
- Non-explosive mining techniques offer an alternative to the increasing costs associated with explosive excavation.
- Explosive excavation is a cyclic process requiring several steps: blast holes are drilled into a rock face, explosive charges are loaded into the blast holes, the surrounding area is evacuated, the explosives are detonated, and the area is ventilated and cleared. Explosive excavation incurs significant costs associated with security and environmental damage, such as the generation of toxic gases.
- Mechanized non-explosive mining may be carried out with fewer personnel and reduce the security and environmental costs of high explosives. This approach also increases processing efficiency by allowing selective mining of the ore veins.
- Mechanical impact hammers can be used to excavate hard rock, but the process is slow; the hammers and support equipment are very heavy and the impact tools wear out quickly.
- FIG. 1 Another example of mechanized non-explosive mining is an impact piston water cannon, in which compressed air drives a heavy piston that impacts and pushes a quantity, or slug, of water.
- the water slug impacts the rock face to cause erosion and excavation.
- impact piston devices have been shown to generate high pressures, their use in commercial excavation work has been limited due to the significant wear on the pistons and cylinders of the devices. Further, the mechanical system that must be maneuvered at the rock face is prohibitively bulky.
- a compressed water cannon designed for hard rock mining is described in "A Hydraulic Pulse Generator for Non-Explosive Excavation," by olle, J.
- the compressed water cannon comprises a heavy pressure vessel charged to very high pressures (100-400 MPa, or 14,500-60,000 psi). At these pressures, the water is substantially compressed and stores a considerable amount of energy. After charging, the water is discharged through a fast-opening valve, which causes the resulting pulse of water to impact the rock face. Discharge of a 100 to 400 MPa pulse onto the face of hard rock will have little or no effect in rock fragmentation. To perform rock fragmentation, the compressed water cannon nozzle must be inserted and discharged into a pre-dri lled blast hole. Discharge of the pulse into the blast hole generates tensile stresses in the rock and allows effective excavation. The productivity and flexibility of this approach, called bench blasting, is limited because drilling is the most time-consuming aspect of the operation.
- the hyper-pressure water cannon or pulse excavator, is able to discharge fluid pulses at extremely high velocities to fracture a rock face in excavation applications.
- a compressed water cannon can be used to generate hyper-pressure pulses by discharging the pulse into a straight nozzle section which leads to a convergent tapered nozzle.
- the water cannon design is relatively compact, and the pulse generator can readily be maneuvered to cover the face of an excavation as part of a mobile mining system.
- the pulse could be generated by a propellant gun.
- Hyper-pressure pulse excavation is an application of the water cannon that eliminates the need for drilling a blast hole.
- the high-velocity water pulse is discharged into a combination straight and tapered nozzle that can amplify the peak pulse pressure by a factor of 10 or more.
- FIG. 1 A illustrates a cross-sectional schematic view of a complete hyper-pressure pulse excavator 100 including an electrical trigger, vent valve assembly 150, pressure vessel 1 10, and two-part nozzle assembly (120 and 132);
- FIGS. I B-I E illustrate the hyper-pressure pulse excavator 100 in various stages of preparing to fire a water pulse
- FIGS. 2A-2C illustrate exemplary measurements for various sizes of the hyper- pressure pulse excavator 100
- FIGS. 3A-3C show nozzle inlet pulse measurement charts based on a 230 MPa discharge from the exemplary embodiment shown in FIG. 2A;
- FIG. 4 illustrates the process of unsteady flow acceleration of a water pulse through straight and tapered nozzle sections
- FIG. 5A-5C illustrate the hyper-pressure outlet pulse measurement charts
- FIG. 5D shows a chart displaying an exemplary exponentially convergent tapered nozzle profile.
- FIG. 5E shows a chart displaying the internal pressure profiles inside an exponentially tapered nozzle at three locations of the fluid pulse.
- FIG. 1 A illustrates a schematic of an exemplary hyper-pressure pulse excavator 100, shown after firing a water pulse.
- the pulse excavator 100 includes a pressure vessel 1 10 and a two-part nozzle assembly, which includes a straight nozzle section 120 and a tapered nozzle section 132 within a nozzle housing 130.
- the pressure vessel 1 10 includes a supply tube 1 12, a poppet sleeve 1 14, a sleeve port 1 16, and a poppet 1 18. When poppet 1 18 is closed, it sits against poppet seat 1 19 at the end of pressure vessel 1 10.
- the poppet 1 18 When the poppet 1 18 is opened, or pushed away from the poppet seat 1 19, the poppet 1 18 and poppet seat 1 19 together act as a dump valve, and pressurized fluid in the pressure vessel 1 10 is discharged into the straight nozzle section 120.
- the junction of the pressure vessel 1 10 and the straight nozzle section 120 includes an opening connected to an air compressor 126 and a second opening connected to a metering pump 122 and a gel supply 124.
- the electrical subsystem of the pulse excavator 100 includes a push button switch 170, arm light 172, arm switch 174, relay switch 176, and the solenoid valve 180 (including battery power for the solenoid).
- FIG. 1 A a series, or system, of cascading valves leading to the pressure vessel 1 10 can be used. Each subsequent stage the handles progressively larger volumes and pressures, and the final stage opens the poppet 1 18 in the pressure vessel 1 10. While FIG. 1A shows an exemplary series of cascading valves, different types and arrangements of valves may be used to operate the poppet 1 18 in the pressure vessel 1 10.
- the series of cascading valves includes the solenoid valve 180, the hydraulic pump return valve 146, the pressurized water supply valve 184, and the vent valve assembly 150.
- the accumulator 140, return tank 142, and hydraulic pump 148, and isolator piston 144 serve to maintain a pressure on the vent valve assembly 150 until the solenoid valve 180 can open.
- the hydraulic pump return valve 146 is open, resulting in water pressure from pressurized water supply 182 moving the isolator piston 144 to its upper position.
- the hydraulic pump 148 is also shown with a return tank 142 and an accumulator 140.
- pressurized water supply valve 184 is open, and the solenoid valve 180 to the tank 178 is closed and unarmed. Additional details of the valve operation can be seen in U.S. Patent No. 5,000,5 16 to Kolle, entitled “Apparatus for rapidly generating pressure pulses for demolition of rock having reduced pressure head loss and component wear,” issued March 19, 1991, which is incorporated herein in its entirety.
- the pulse excavator 100 further includes a vent valve assembly 150.
- the vent valve assembly 150 includes a vent valve housing 158 with vent valve vents 160. Although the pressurized water supply valve 184 is open, the vent valve piston 156 in the vent valve housing 158 is not pressurized to a sufficient level to tightly hold the poppet 154 against its seat 152.
- the vent valve assembly 150 is connected to the supply tube 1 12 of the pressure vessel 1 10.
- An ultra-high pressure pump 162 with a water inlet 164 is also coupled to the vent valve assembly.
- FIG. I B shows the system ready to fire a water, or water-based, pulse.
- the pressurized water supply valve 184 is closed.
- the hydraulic pump return valve 146 of the hydraulic pump 148 is closed, and the hydraulic pump 148 has been actuated, pressurizing the top of the isolator piston 144 with oil, water, or another fluid.
- the other side of the isolator piston 144 contains water.
- the top of the isolator piston 144 is pressurized, the left side of the vent valve piston 156 is pressurized, causing the vent valve piston 156 to push against and hold the vent valve poppet 154 against the vent valve poppet seat 152.
- the ultrahigh pressure pump 162 is then actuated and used to charge the pressure vessel 1 10 through the supply tube 1 12 into the cavity between the poppet sleeve 1 14 and poppet 1 18 within the pressure vessel 1 10.
- This pressurization pushes the poppet 1 18 against its seat 1 19 at the outlet of the pressure vessel 1 10, closing the fluid path to the straight nozzle section 120.
- the sleeve port 1 16 is exposed, allowing water to flow into the pressure vessel 1 10 through the supply tube 1 12.
- the pressure within the pressure vessel 1 10 builds, typically to 100 to 400 MPa.
- the air compressor 126 may supply compressed air to the straight nozzle section 120. This helps to empty the straight nozzle section 120 and tapered nozzle section 132 of any residual water (for example, from the previous water pulse firing).
- a small volume of a gelled fluid 125 such as agar, polyacrylamide, or bentonite gel may be metered using the metering pump 122 from into the straight nozzle section 120 immediately below the poppet seat 1 19. This precharges the straight nozzle section 120 with the gelled fluid 125, allowing the gelled fluid 125 to be on the leading edge of the fluid pulse when the pulse excavator 100 fires.
- This gelled fluid may also be weighted with a substance such as salt to increase its density.
- the arm switch 174 electrical circuit is then armed, the air valve of the air compressor 126 is closed, and the system 100 is ready to fire.
- FIG. 1 C illustrates the start of the firing sequence.
- the push button switch 170 is closed or depressed, causing the relay switch 176 to close and the solenoid valve 180 to open.
- the solenoid valve 180 opens, the isolator piston 144 moves down at constant pressure.
- the opening time of the solenoid valve 180 is preferably very short, such as on the order of 100 milliseconds so, but there is a limit to the opening speed of solenoid valves.
- the isolator piston 144 and accumulator 140 assembly give the solenoid valve 180 time to open fully by maintaining pressure on the vent valve poppet 154 before the isolator piston 144 reaches the end of its travel.
- the left side of the vent valve piston 156 is depressurized, and the ultra-high pressure on the face of the vent valve poppet 154 causes it to open.
- FIG. I D illustrates the continuation of the firing sequence, with the vent valve poppet 154 fully open. This depressurizes the water in the supply tube 1 12 and the volume of water in the cavity between the poppet 1 18 and poppet sleeve 1 14 in the pressure vessel 1 10. Because the section area of the poppet 1 18 is larger than the seal area of the poppet seat at the base of the straight nozzle section 120, a large force lifts the poppet 1 14 from its seat. The poppet 1 18 opens very quickly, acting like a fast-opening dump valve and discharging the compressed water from the body of the pressure vessel 1 10. Once the poppet 1 18 is open, the water contained in the pressure vessel 1 10 begins accelerating through the straight nozzle section 120.
- the gel slug is also pushed by the accelerating water pulse.
- the gel slug and water slug are pushed through the straight nozzle section 120 as well as the nozzle housing 130, as shown in FIG. I E.
- the nozzle housing 130 contains a tapered nozzle section 1 32, which tapers from the diameter of the opening of the straight nozzle section 120.
- the tapered nozzle section 132 Due to the unsteady flow phenomenon, the gel and water slugs are extruded though the tapered nozzle section 132 at extremely high velocities.
- the process of unsteady flow acceleration is illustrated in FIG. 4.
- U 0 When a fluid pulse moving at uniform velocity, U 0 , enters a tapered nozzle, the leading edge of the pulse accelerates (U e ), while the trailing edge of the pulse slows (U b ).
- the velocities can be calculated for a given nozzle profile based on the principles of continuity of momentum and volume. If no gel is used, then the water will be at the leading edge of the pulse.
- the tapered section 132 is exponential.
- the tapered nozzle section 132 is preferably fabricated from a hard erosion-resistant material such as hardened steel or carbide. This material may be held by a nozzle housing 130 made of high strength steel.
- the two part construction of the tapered nozzle allows the use of hard, erosion- resistant materials that may have low tensile strength.
- the tapered nozzle can be fabricated from one part if a sufficiently high strength steel is used.
- FIGS. 2A-2C illustrate exemplary dimensional measurements for various sizes of the hyper-pressure pulse excavator 100.
- the productivity of hyper-pressure pulse excavation can be expressed in terms of specific energy, which is the ratio of the pulse energy to the volume of rock removed. Increasing the scale of the system increases efficiency substantially, since the specific energy required for breaking is inversely proportional to the rock fragment size.
- impact piston cannons provide a means of generating hyper-pressure pulses, but the mechanism for these devices is very bulky and generates large reaction forces. Further, as also described above, their use in commercial excavation work has been limited due to the significant wear on the pistons and cylinders of the devices.
- the compressed water cannon as described herein can provide the similar pressure levels more efficiently.
- the pulse excavator 100 uses the system of cascaded valves to build to sufficient pressure levels.
- alternate valve systems such as a hand valve or a large solenoid valve, may be used. This may allow the pulse excavator 1 10 to be operated with a single- or dual-level valve system.
- single- or dual-level valve systems will likely not provide the performance required for operation.
- the cascaded valve system allows for smaller valves to be used at the various stages, further allowing for the use of smaller batteries to actuate the solenoid valve 180.
- the operating pressure of the pressure vessel 1 10 alone is limited by practical considerations to 100-400 MPa (14,500-60,000 psi). However, the pressure required to effectively break harder rock requires fluid pulses with stagnation pressures above 2 GPa (300,000 psi). As mentioned above, the straight nozzle section 120 and tapered nozzle section 132 are used to amplify the velocities of fluid pulses to achieve the stagnation pressures required to effectively break rock.
- the diameter of the straight nozzle section 120 may be equal to the diameter of the discharge valve of the pressure vessel 1 10.
- the diameter of the straight nozzle section 120 is smaller than the diameter of the pressure vessel 1 10 bore— typically, around 20% to 30% of the bore is preferred, though the range could be 10% to 50%.
- FIG. 3 A shows the observed stagnation pressure from a water pulse discharged from the exemplary embodiment shown in FIG. 2A (without the attached nozzle) when the pressure vessel 1 10 is charged to 230 MPa versus time. Note that the peak stagnation pressure is substantially less than the charge pressure of 230 MPa. Further, the rise time of the pressure release is very fast, on the order of 1 -2 ms. The fast rise time is facilitated by the presence of the fast-opening dump valve, such as the poppet valve 1 18.
- FIG. 3B shows the velocity of the pulse as a function of pulse length as calculated from the stagnation pressure profile.
- a uniform-velocity slug of water is needed to generate a hyper-pressure pulse in a tapered nozzle section 132.
- the velocity of water exiting the cannon valve varies continuously, however a pulse of about 0.5 m length with a velocity of over 500 m/s is generated.
- the kinetic energy of the pulse rises linearly up to around 0.5 m and then increases at a lower rate.
- the velocity is slow as the valve opens, peaks after the valve is opened, and then drops as the cannon decompresses.
- a straight nozzle section 120 accumulates the water in the leading edge of the pulse and allows the higher-velocity fluid to catch up, forming a uniform-velocity slug. Once the slug velocity starts to drop, the slug will stretch and break up.
- the velocity of the water pulse can be measured against the length of the pulse.
- pulse velocity and length should be maximized.
- a pulse length of 0.5 meters was chosen based on the chart shown in FIG. 3B.
- the point representing the pulse length of 0.5 meters in FIG. 3B was selected as maximizing both pulse velocity and length because the pulse velocity begins to decrease more substantially after the pulse length of 0.5 meters.
- the length of the straight nozzle section 120 was set at 0.5 meters.
- the final volume of the straight nozzle section 120 may be preferably between 2-10% of the volume of the pressure vessel 1 10.
- the tapered nozzle parameters may be determined.
- the tapered nozzle section 132 accelerates the leading edge of the pulse to hyper velocity through unsteady flow dynamics.
- the tapered nozzle section 132 accelerates the leading edge of the pulse to hyper velocity through unsteady flow dynamics.
- the internal pressure along the length of the nozzle can also be calculated from the local acceleration. The details of this calculation are described in Glenn, Lewis A. (1974) "On the dynamics of Hypervelocity liquid jet impact on a flat rigid surface," Journal of Applied Mathematics and Physics (ZAMP), vol. 25.
- the theoretical profile agrees reasonably well with the observed profile shown in FIG. 3B.
- the theoretical velocities of the leading and trailing edges (shown as U e and U b , respectively) of this water slug as it moves through the tapered nozzle are shown in Figure 5B.
- the leading edge accelerates to over 2000 m/s, while the trailing edge decelerates.
- the peak velocity drops rapidly, to under 1000 m/s after 200 ⁇ In this time the leading edge of the pulse will travel 0.4 m (16 in.).
- the nozzle should be located at a fraction of this distance from the target to maximize effectiveness.
- the velocity profiles may be calculated by assuming that the water is an incompressible fluid, although water is compressible at such velocities.
- the peak velocity of the discharged jet may be limited by the speed of sound in water (around 1500 m/s), which may limit the peak velocities to values lower than those shown in Figure 5B.
- the compressed water pulse will convert to a 2-GPa pressure spike in a 1 50-mm-long convergent tapered nozzle, as shown in FIG. 5B, with 80% energy conversion above 1 GPa, as shown in FIG. 5C.
- FIG. 5E An example of the internal pressure profiles inside an exponentially tapered nozzle at three locations of the pulse is provided in FIG. 5E.
- the internal pressure builds as the pulse enters the tapered section.
- the peak pressure occurs at the moment that the pulse reaches the exit of the nozzle.
- the peak internal pressure is less than 1 GPa (145,000 psi) which is within the capacity of the nozzle materials available.
- the nozzle comprises a carbide inner section that is pressed into a sleeve to provide a preload on the carbide.
- a composite nozzle of this type provides higher internal pressure capacity than a monobloc nozzle.
- the cross-sectional area of the tapered nozzle section 132 is denoted as A(x), and it decreases exponentially along the length of the tapered nozzle section 132, which is denoted as x.
- the relationship between the length and cross-sectional area of the tapered nozzle section 132 is shown according to the following exponential equation:
- R is the inlet/outlet area ratio
- l t is the total length of the tapered nozzle section 132.
- An exponential tapering is used for the tapered nozzle section 132, as opposed to a linear tapering, to prevent the tapered section from being blown off from the pressure release during a firing.
- An external nut may be used to clamp the tapered nozzle section 132 to the straight nozzle section 120. This nut may be attached with a torque of about 2000 ft-lbf. Based on the configuration of the straight nozzle section 120 and tapered nozzle section 132, a water cannon may be converted into the hyper-pressure water cannon 100 suitable for use in excavation applications.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261676774P | 2012-07-27 | 2012-07-27 | |
PCT/US2013/052567 WO2014018977A1 (en) | 2012-07-27 | 2013-07-29 | Hyper-pressure pulse excavator |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2877697A1 true EP2877697A1 (en) | 2015-06-03 |
EP2877697A4 EP2877697A4 (en) | 2016-03-02 |
EP2877697B1 EP2877697B1 (en) | 2018-05-16 |
Family
ID=49997896
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13823572.6A Not-in-force EP2877697B1 (en) | 2012-07-27 | 2013-07-29 | Hyper-pressure pulse excavator |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2877697B1 (en) |
AU (1) | AU2013295512B2 (en) |
CA (1) | CA2880114C (en) |
NO (1) | NO2968313T3 (en) |
WO (1) | WO2014018977A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017119610A1 (en) | 2017-08-26 | 2019-03-21 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for generating a sequence of beam sections of a discontinuous, modified liquid jet |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109488299B (en) * | 2018-12-29 | 2024-02-20 | 山东东山新驿煤矿有限公司 | Hydraulic fracturing softening device and method for hard rock of fully-mechanized rock-digging roadway |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3520477A (en) * | 1968-02-23 | 1970-07-14 | Exotech | Pneumatically powered water cannon |
US3572839A (en) * | 1968-08-28 | 1971-03-30 | Toa Kowan Kogyo Kk | Process for excavation of hard underwater beds |
US4074858A (en) * | 1976-11-01 | 1978-02-21 | Institute Of Gas Technology | High pressure pulsed water jet apparatus and process |
US4231283A (en) * | 1978-11-01 | 1980-11-04 | Messerschmitt-Bolkow-Blohm Gesellschaft Mit Beschrankter Haftung | Pulsating liquid jet gun and method of operating the same |
US4290496A (en) * | 1979-10-19 | 1981-09-22 | Briggs Aubrey C | Combination impact and pressure liquid rock drill |
US4863101A (en) * | 1982-12-06 | 1989-09-05 | Acb Technology Corporation | Accelerating slugs of liquid |
US5000516A (en) | 1989-09-29 | 1991-03-19 | The United States Of America As Represented By The Secretary Of The Air Force | Apparatus for rapidly generating pressure pulses for demolition of rock having reduced pressure head loss and component wear |
GB9517378D0 (en) * | 1995-08-24 | 1995-10-25 | Sofitech Nv | Hydraulic jetting system |
US6301766B1 (en) * | 1998-01-12 | 2001-10-16 | Tempress Technologies, Inc. | Method for metal working using high pressure fluid pulses |
-
2013
- 2013-07-29 AU AU2013295512A patent/AU2013295512B2/en not_active Ceased
- 2013-07-29 WO PCT/US2013/052567 patent/WO2014018977A1/en active Application Filing
- 2013-07-29 EP EP13823572.6A patent/EP2877697B1/en not_active Not-in-force
- 2013-07-29 CA CA2880114A patent/CA2880114C/en not_active Expired - Fee Related
-
2014
- 2014-03-17 NO NO14712717A patent/NO2968313T3/no unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017119610A1 (en) | 2017-08-26 | 2019-03-21 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for generating a sequence of beam sections of a discontinuous, modified liquid jet |
Also Published As
Publication number | Publication date |
---|---|
CA2880114C (en) | 2016-05-17 |
EP2877697A4 (en) | 2016-03-02 |
WO2014018977A1 (en) | 2014-01-30 |
NO2968313T3 (en) | 2018-06-30 |
AU2013295512B2 (en) | 2016-03-10 |
AU2013295512A1 (en) | 2015-02-19 |
CA2880114A1 (en) | 2014-01-30 |
EP2877697B1 (en) | 2018-05-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9057262B2 (en) | Hyper-pressure pulse excavator | |
CN108386134B (en) | Ram accelerator system | |
US4289275A (en) | Method and device for breaking a hard compact material | |
US5927329A (en) | Apparatus for generating a high-speed pulsed fluid jet | |
JP4551960B2 (en) | Excavator | |
Singh | Non-explosive applications of the PCF concept for underground excavation | |
US8201486B1 (en) | Two-stage light gas gun | |
EP1855737A1 (en) | System and method for controlling access to features of a medical instrument | |
US6375271B1 (en) | Controlled foam injection method and means for fragmentation of hard compact rock and concrete | |
US4264107A (en) | Demolition tool for breaking solid materials | |
CA2880114C (en) | Hyper-pressure pulse excavator | |
US5803551A (en) | Method apparatus and cartridge for non-explosive rock fragmentation | |
US7708178B2 (en) | Handheld pneumatic tool for breaking up rock | |
NO763071L (en) | PROCEDURE AND DEVICE FOR BREAKING A SOLID MATERIAL, SUCH AS A MOUNTAIN. | |
Cooley et al. | High-pressure water jets for undersea rock excavation | |
Murray et al. | Developments in rock-breaking techniques | |
Doolan | Design and construction of the X-2 two-stage free piston driven expansion tube | |
Mahmoud | Impact of High Speed Projections into Selected Targets |
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: 20150107 |
|
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 |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAX | Request for extension of the european patent (deleted) | ||
RA4 | Supplementary search report drawn up and despatched (corrected) |
Effective date: 20160203 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: E21C 37/12 20060101AFI20160128BHEP |
|
17Q | First examination report despatched |
Effective date: 20170228 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20180226 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 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 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: NO Ref legal event code: T2 Effective date: 20180516 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602013037629 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 999762 Country of ref document: AT Kind code of ref document: T Effective date: 20180615 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20180516 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180816 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180817 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 999762 Country of ref document: AT Kind code of ref document: T Effective date: 20180516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602013037629 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180729 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20180731 |
|
26N | No opposition filed |
Effective date: 20190219 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190201 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180731 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180731 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180731 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180731 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180729 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NO Payment date: 20190625 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20190624 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180729 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20130729 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180516 Ref country code: MK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180516 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20180916 |
|
REG | Reference to a national code |
Ref country code: NO Ref legal event code: MMEP |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20200729 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200729 Ref country code: NO Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200731 |