EP0824633A1 - Prop for use in underground mining or tunnel construction - Google Patents
Prop for use in underground mining or tunnel constructionInfo
- Publication number
- EP0824633A1 EP0824633A1 EP96912021A EP96912021A EP0824633A1 EP 0824633 A1 EP0824633 A1 EP 0824633A1 EP 96912021 A EP96912021 A EP 96912021A EP 96912021 A EP96912021 A EP 96912021A EP 0824633 A1 EP0824633 A1 EP 0824633A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outer tube
- support
- chamber
- piston
- inner tube
- 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
- 238000005065 mining Methods 0.000 title claims abstract description 6
- 238000010276 construction Methods 0.000 title abstract description 7
- 239000004566 building material Substances 0.000 claims description 32
- 239000006260 foam Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000012858 resilient material Substances 0.000 claims description 2
- 230000005641 tunneling Effects 0.000 claims description 2
- 239000004035 construction material Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 210000002105 tongue Anatomy 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/18—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
Definitions
- the invention relates to an extension support for underground mining or tunnel construction, consisting of two telescopically telescoping tubes closed at the free ends, which can be clamped against the mountains by means of a hydraulically operating setting device and between which a locking device is provided, by means of which the inner tube can be mechanically fixed to the outer tube in different extension lengths, the interior of the support being able to be filled with building material while maintaining the setting load.
- Such building props filled with building materials have recently been used frequently instead of the wooden stamps or hydraulic individual stamps previously used. They have the advantage that they can apply very high supporting forces with a very light construction. Since the pipes essentially only serve as tensile shells for the largely pressure-resistant building material, the design principles of lightweight construction can be used consistently in the design of the steel structure. Because of the uncritical loading of the pipes, simple welded pipes made of cheap structural steel can be used. As long as the pipes are still empty, the supports have a very low weight and can therefore be transported and handled at the installation site become.
- these expansion supports - in contrast to hydraulic individual punches - can be used as a so-called lost expansion, which can easily remain in the offset area after use, for example in the transitional area of the face / stretch.
- Such a lost expansion in the area of the route seam also has advantages with regard to the further stability of the route.
- Such a building material-filled support is known, for example, from DE-PS 41 15 2o9.
- This support which is known from this prior art, uses a plurality of hydraulic tensioning cylinders for tensioning before the building material is filled in, which are attached to the outside of the outer tube and the inner tube and move the inner tube against the outer tube. In the extended position, a locking device fixes the inner tube on the outer tube in the respective extended position. The hydraulic clamping cylinders can then be removed. Finally, the extension prop braced against the mountains in this way is filled with the building material.
- expansion support can only absorb relatively small forces until it is filled with the building material, because the mechanical locking device always first requires a certain insertion path of the inner tube against the outer tube, before it is worth mentioning Can absorb forces.
- the known expansion supports are therefore not sufficiently early to support . and require a relatively large convergence to develop their full support.
- the older, not prepublished DE 43 38 83o Cl discloses a similar support, in which the inner end of the inner tube is closed and in this way forms a piston which is guided in a sealed manner in the outer tube and through which the interior of the support in is divided into two chambers, both with building material, eg compressible foam concrete, can be filled.
- the piston does not serve here to set the support with a high setting load, but rather to achieve a defined flexibility of the support in cooperation with the compressible filler.
- a setting mechanism is used for setting, which is located at the insertion end of the Outer tube is located and adjustable in height on the inner tube can be fixed. With this mechanical setting device, high setting loads cannot be achieved. Likewise, a high setting load cannot be achieved by filling expanding foam into the interior of the support. Such foam is namely compressible and can therefore not generate high setting loads.
- the object of the invention is an extension support for underground mining and tunneling, consisting of an inner tube and an outer tube, which are designed to be closed at their free ends, telescopically telescopic, and can be pushed into different extension lengths by means of a mechanical locking device can be fixed to one another, a piston which can be hydraulically loaded with set pressure and which acts on the inner tube in the direction of extension, which is designed as a flying component separate from the inner tube, and which places the interior of the support into a one located below the piston is arranged in the outer tube first chamber (lower chamber) and a second chamber (upper chamber) located above the piston, the first chamber (lower chamber) being assigned a first filling connection, via which this chamber can be pressurized with a pressurized pressure medium, and the second chamber (upper chamber) a second Rac is assigned via which the extension support can be filled with building material over its entire length by displacing the flying piston up to the end of the outer tube.
- a mechanical locking device can be fixed to one another
- the support according to the invention initially has the advantage that the setting and bracing against the mountains is extremely simple.
- a suitable hydraulic pressure medium is applied to the lower chamber of the support.
- Water from the underground, as a rule existing low-pressure water pipe, is suitable for this purpose. This usually leads to a pressure of 40 bar, which, in view of the large diameter of the outer tube, is sufficient to generate a considerable setting force.
- the operations for the setting process are just as simple as for hydraulic individual punches. In particular, the laborious manipulation of separate setting cylinders is eliminated.
- the extension support set in this way is - just like a hydraulic single punch - very early support, so it counteracts the onset of convergence from the outset with a considerable support force.
- the mechanical locking device develops its full load-bearing capacity, so that the pressure medium loading the piston can be released and the extension support can be filled with construction material via the second filler connection.
- the flying piston is pushed back as far as desired — possibly to the bottom of the outer tube.
- the inner tube is fixed to the outer tube by means of the mechanical locking device.
- a particularly advantageous embodiment of the expansion support according to the invention provides that the mechanical locking device consists of two ring wedge elements, which can be pushed into one another between the lower end of the inner tube and the piston, one of which, when pushed into one another, with plastic expansion of the Outer tube is radially expandable.
- This design of the mechanical locking device results in an early-bearing and very stable mechanical bond between the inner tube and the outer tube.
- a particular advantage of this mechanical connection is that the inner tube remains displaceable against the outer tube over a relatively long distance while maintaining a very high setting load.
- the outer tube is plastically widened over the length of the sinking path. This plastic expansion is visible from the outside on the outer support and shows to the miner that a certain convergence has already occurred on this support.
- the wedge surfaces of the ring wedge element and / or the Counter ring wedge element are provided with projections that can be sheared off at a predetermined setting load, which only release a displacement of the wedge surfaces against one another when the predetermined setting load is exceeded.
- the locking device can also be designed as an expansion spring ring arranged at the lower end of the inner tube, which is elastically preloaded in the radial direction and is designed such that it permits an extension movement of the inner tube relative to the outer tube, but in the radial direction during an insertion movement spreads out that a friction and / or positive connection to the outer tube is produced.
- the locking device can also have a ring wedge which can be fixed on the outer circumference of the inner tube and which can be inserted into the outer tube from above with a plastic widening of the outer tube.
- a locking device designed in this way is also flexible over a very large movement path while maintaining a high supporting force and enables the extension support to be given a suitable supporting characteristic.
- the ring wedge on its inner circumference is expediently exposed to the friction between the ring wedge and the inner tube. heightening means. In this way, the ring wedge attaches to the inner tube in the axial direction, so that the flexibility of the locking device is given primarily by the plastic widening of the outer tube.
- a ring of elastically prestressed material rests on the upper side of the ring wedge, which ring is supported on the upper end of the outer tube and presses the ring wedge downward in the axial direction. This ensures that the ring wedge immediately begins the expansion of the outer tube when convergence begins. The removal prop thus develops the full support force after a relatively small sinking distance in the area of the locking device.
- the piston used for the support according to the invention is suitably made of resilient and / or plastically resilient material, in particular plastic, has a ring-lip seal conforming to the wall of the outer tube and is attached to the bottom of a pot-shaped, rigid guide element.
- a piston can be manufactured very cheaply and is sufficiently wear-resistant for the single use of the support.
- a pressure relief valve can expediently be assigned to the lower chamber.
- Such a pressure relief valve which is known in principle from hydraulic rams, has the advantage in combination with the flying piston that the extension support can be filled over its entire length with building material while maintaining the pressure prevailing in the subchamber. To do this, however, a building material pump is required, which is the one to be supplied to the upper chamber Building material with a pressure that is slightly greater than the opening pressure of the pressure relief valve.
- the rupture disk serving as a pressure limitation is assigned to the lower chamber.
- This rupture disc responds - just like the pressure limiting valve - when a certain pressure is exceeded. This pressure occurs when the convergence has progressed accordingly and the support is loaded to such an extent that the mechanical locking device develops its full load-bearing capacity. For the miner on site, the broken rupture disc is an indication that he can now fill this expansion support with building material.
- elastic, compressible bodies can be arranged in the sub-chamber, in particular in the form of air-filled hollow bodies or foam bodies.
- the subchamber receives precisely selectable elastic properties until the full support force is applied. By filling more or less such bodies, the carrying properties of the support can be changed as desired.
- the support can optionally also be provided with axially compressible spring elements on the foot or head side.
- the wall of the outer tube is provided with bores which serve to limit the stroke and which, when run over by the piston, connect the lower chamber to the atmosphere.
- the walls of the inner and outer tubes are provided with drainage bores in the overlap area, which complement or support the drainage device located in the column head.
- the drainage holes allow water to escape from the filled building material. This removal of excess water is important so that the building material can form a supporting column and can set if necessary.
- the support according to the invention finally provides that the outer tube and the inner tube are arranged in the interior of a casing consisting of two nested, telescoping tubes that have a larger diameter than the extension support over their entire length, the Annulus between the support and the casing can be filled with building material.
- a casing consisting of two nested, telescoping tubes that have a larger diameter than the extension support over their entire length, the Annulus between the support and the casing can be filled with building material.
- FIG. 1 shows a support according to the invention schematically in longitudinal section without pressure medium and building material
- FIG. 2 shows the support according to FIG. 1 during the setting process
- FIG. 3 shows the support according to FIG. 1 when convergence begins
- FIG. 4 shows the support according to FIG. 1 before it is filled with building material
- FIG. 5 shows the support according to FIG. 1 after it has been filled with building material
- FIG. 6 shows a support according to the invention with an expanding spring ring as
- FIGS. 7, 8 and 9 an extension support according to the invention with a further embodiment of the locking device
- FIGS. 7, 8 and 9 shows a development of the support shown in FIGS. 7, 8 and 9; 11 shows a detailed representation of the piston;
- FIG. 13 shows an expansion prop according to the invention with a resilient head part
- FIG. 14 shows a support according to the invention with compressible hollow bodies in the lower chamber
- FIG. 17 shows a support according to the invention with a special embodiment of the piston
- FIG. 18 shows a support according to the invention with a casing.
- the overall support is designated by the reference numeral 1. It consists of an outer tube 2, closed at the bottom and open at the top, in which an inner tube 3, which is open at the bottom and closed at the top, can be pushed out. At the lower end of the inner tube 3 there is a piston 4, which is sealingly guided in the outer tube 2 and serves to push out the inner tube 3. Below the piston 4 there is a first chamber (lower chamber 5) in the outer tube 2, which is connected via a filling Final 6 with a suitable pressure medium, such as pressurized water can be acted upon.
- a suitable pressure medium such as pressurized water
- a second chamber (upper chamber 7) which is essentially formed by the inner tube 3 and is provided with a filling connection 8 at the upper end.
- the inner tube 3 can be fixed to the outer tube 2 by means of a locking device 9.
- This locking device 9 has an annular wedge lo, which can be fixed on the outer circumference of the inner tube 3 and can be inserted into the outer tube 2 from above with plastic widening of the outer tube 2.
- the piston 4 is designed as a flying piston, i.e. it is a separate component from the inner tube 3 and is supported on the inner tube 3 from below.
- the support 1 is braced between the hanging and the lying.
- the subchamber 5 is filled with a pressure medium suitable for the setting process, e.g. Druckwas ⁇ water from the low pressure water line, acted upon.
- a pressure medium suitable for the setting process e.g. Druckwas ⁇ water from the low pressure water line
- the filling connection 6 is shut off.
- the inner tube 3 is pressed downward with great force, so that the outer tube 2 is deformed slightly elastically, ie becomes slightly thicker under the influence of the pressure prevailing in the lower chamber 5.
- the ring wedge lo penetrates into it the upper end of the outer tube and expands it plastically.
- the locking device 9 gradually loads up until the locking device 9 can absorb the required supporting force alone.
- the lower chamber 5 is then emptied. In this state, the supporting force is applied solely by the locking device 9.
- the support can now be filled with building material from above via the filling connection 8
- the building material presses the piston 4 in the outer tube 2 to the bottom thereof, so that the extension support is filled with building material over its entire length. If one wants to fill only a part of the length of the support with building material in order to achieve a certain load-bearing behavior, the filling process can be interrupted at any time.
- the building material can be filled at any point in time as soon as the locking device 9 is sufficiently worn.
- the support behavior of the support according to the invention can be adapted at any time to the rock pressure and the convergences that occur.
- the miner still has numerous options on site to influence the support behavior of the support according to the invention.
- FIG. 6 largely corresponds to the embodiment of FIG. 1.
- an expansion spring ring 11 is arranged at the lower end of the inner tube 3, which is elastically preloaded in the radial direction and with its resilient tongues on the inner wall of the outside ⁇ tube 2 abuts.
- the spring tongues are arranged so that the inner tube can be moved upwards together with the expanding spring ring 11, but does not permit a downward movement.
- spread out the tongues of the expansion spring ring in the radial direction such that a frictional or positive connection to the outer tube 2 is produced.
- the inner tube 3 is provided at its lower end with a radially expandable ring wedge element 12, into which a piston element 4 supported above the piston 4 is supported Counter ring wedge element 13 can be inserted from below. If the mating ring wedge element 13 is inserted from below into the radially expandable ring wedge element 12, it expands with the plastic expansion of the outer tube 2, so that an extremely stable connection with immediate bearing properties between the inner tube 3 and the outer tube 2 results.
- shearable projections 12a which project radially inwards and which must first be sheared off by the counter ring wedge element 13 before the counter ring wedge element 13 can be inserted into the ring wedge element 12.
- the cross-sections of the projections 12a which can be sheared off are selected to be so large that the counter-ring wedge element 13 can only be pushed into the ring wedge element 12 when a predetermined, relatively high setting load is exceeded.
- corresponding shearable projections can optionally also be provided on the wedge surfaces of the mating ring wedge element 13.
- FIG. 11 shows a detailed representation of the piston 4.
- This consists of an elastically and / or plastically flexible material, in particular of plastic, and has an annular lip 4a which clings to the wall of the outer tube.
- the piston 4 is at the bottom of a cup-shaped, attached rigid guide element 4b, which consists for example of steel.
- This guide element 4b gives the piston the required guidance and rigidity, while the lip seals 4a ensure the tightness.
- a piston designed in this way is inexpensive to manufacture and is therefore particularly suitable for single use.
- FIG. 12 shows an embodiment of the support according to the invention, in which the lower chamber 5 is assigned a rupture disk 14 serving as a pressure limitation. This rupture disc responds when the load on the support has progressed to such an extent that the blocking device 9 bears sufficiently.
- the inner tube 3 is provided on the head side with axially compressible spring elements 15.
- Such spring elements 15 can optionally also be arranged on the foot side of the outer tube 2.
- elastically compressible hollow bodies in particular in the form of air-filled hollow bodies 14 or foam bodies, can optionally be arranged in the subchamber 5. These elastically compressible hollow bodies 14 bring about additional elastic compliance of the support.
- bores 18 are provided in the wall of the outer tube 2 at a distance from its upper end, which serve as a stroke limitation and which, when they are run over by the piston, connect the lower chamber 5 to the atmosphere. As soon as this connection is established, the piston 4 can of course no longer be moved upward. 15 also shows drainage bores 19 in the inner tube 3 and 20 in the outer tube 2, which are located in the overlap area of the inner tube 3 and outer tube 2.
- the drainage bores 20 of the outer tube 2 are covered on the outside by a water-permeable fabric 21, which is dense for building material.
- the support bracket naturally has the usual drainage device in the column head.
- the ring wedge 10 is provided on its inside with sharp projections 10 a which engage in the outer wall of the inner tube 3.
- a ring 22 made of elastically prestressed material is arranged above the ring wedge lo, which in turn is supported on the upper end of the outer tube 2 and presses the ring wedge lo downward in the axial direction.
- the piston 4 has an elastic projection 4c which projects downward and which, after the expansion support has been filled with building material, abuts the bottom of the outer tube 2 and likewise ensures elastic support behavior.
- the support is arranged inside a sheathing consisting of two nested tubes 23, 24 that are telescopically nested. Over its entire length, this casing has a larger diameter than the support 1, the annular space between the support 2, 3 and the casing 23, 24 being fillable with building material via a filler connection 25 arranged at the top.
- the expansion support 2, 3 arranged in the interior of the casing 23, 24 can, as explained above, be set by a hydraulic loading of the piston 4 with such a large setting load that Locking device 9 are mechanically fixed and are filled with construction material over their entire length via the upper filling connection 8. In conjunction with the sheathing, this support has an extremely high load-bearing capacity.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Actuator (AREA)
- Rod-Shaped Construction Members (AREA)
- Piles And Underground Anchors (AREA)
- Fluid-Damping Devices (AREA)
- Supports For Pipes And Cables (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19514137A DE19514137C2 (en) | 1995-04-20 | 1995-04-20 | Extension support for underground mining or tunnel construction |
DE19514137 | 1995-04-20 | ||
PCT/EP1996/001634 WO1996033336A1 (en) | 1995-04-20 | 1996-04-19 | Prop for use in underground mining or tunnel construction |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0824633A1 true EP0824633A1 (en) | 1998-02-25 |
EP0824633B1 EP0824633B1 (en) | 1999-07-14 |
Family
ID=7759708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96912021A Expired - Lifetime EP0824633B1 (en) | 1995-04-20 | 1996-04-19 | Prop for use in underground mining or tunnel construction |
Country Status (8)
Country | Link |
---|---|
US (1) | US5921718A (en) |
EP (1) | EP0824633B1 (en) |
CN (1) | CN1064734C (en) |
AU (1) | AU699612B2 (en) |
DE (3) | DE29507774U1 (en) |
PL (1) | PL179979B1 (en) |
WO (1) | WO1996033336A1 (en) |
ZA (1) | ZA9510280B (en) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6056480A (en) * | 1995-04-20 | 2000-05-02 | Kolk; Theodor | Support for underground mining and tunnel construction |
DE10044367A1 (en) | 2000-09-08 | 2002-03-21 | Vos Richard Grubenausbau Gmbh | Lost support for mining and tunnel construction |
US6910834B2 (en) * | 2003-05-27 | 2005-06-28 | Burrell Mining Products, Inc. | Mine prop |
US7232103B2 (en) * | 2004-10-27 | 2007-06-19 | Efficient Mining Systems Llc | Load-bearing pressurized liquid column |
ZA200808312B (en) * | 2007-10-24 | 2009-11-25 | Nils Mittet Skarboevig | Mine support grout bags and grout packs |
US8801338B2 (en) * | 2011-11-28 | 2014-08-12 | Micon | Nested mine roof supports |
GB201008182D0 (en) * | 2010-05-17 | 2010-06-30 | Airbus Operations Ltd | An apparatus for fixedly locating a first aerospace component relative to a second aerospace component |
AU2010257264B1 (en) * | 2010-08-02 | 2011-06-23 | Craig Barnet | An Improved Prop for Mining, Construction and the Like |
US9140026B2 (en) | 2010-08-02 | 2015-09-22 | Cougar Can Company Pty Ltd. | Telescopic pumpable props |
US8821075B2 (en) * | 2011-10-26 | 2014-09-02 | Strata Products Worldwide Llc | Yieldable support prop and method |
AU2013206571A1 (en) * | 2012-08-17 | 2014-03-06 | Mine Support Products (Pty) Ltd | Prop |
US8851805B2 (en) | 2012-08-30 | 2014-10-07 | Burrell Mining Products, Inc. | Telescopic mine roof support |
US20140072374A1 (en) * | 2012-09-07 | 2014-03-13 | Elbroc Mining Products (Pty) Ltd | Support prop |
CN103290893B (en) * | 2013-07-03 | 2014-09-17 | 刘建华 | Double-hole drainage pipe |
AU2014331528B2 (en) | 2013-10-01 | 2018-10-25 | Adbri Mining Products Pty Ltd | Support for use in mine |
US9995140B2 (en) * | 2013-11-22 | 2018-06-12 | Fci Holdings Delaware, Inc. | Yieldable prop with yieldable insert |
EA201692170A1 (en) * | 2014-04-28 | 2017-03-31 | Коугар Кан Компани Пти Лтд. | TELESCOPIC PUMPING STAND IN ASSEMBLY WITH IMPROVED CHARACTERISTICS OF RESISTANCE OF CEILING LOADS |
US9611738B2 (en) | 2014-08-27 | 2017-04-04 | Burrell Mining Products, Inc. | Ventilated mine roof support |
US9903203B2 (en) | 2014-08-27 | 2018-02-27 | Burrell Mining Products, Inc. | Ventilated mine roof support |
CN104879145B (en) * | 2015-06-05 | 2017-06-20 | 江苏中矿立兴能源科技有限公司 | A kind of mechanical extending and constant-resistance can contracting high intensity individual prop |
AU2016222477A1 (en) | 2016-09-02 | 2018-03-22 | Mgw Engineering Pty Ltd | Apparatus for supporting an explosive device |
WO2020086790A1 (en) * | 2018-10-24 | 2020-04-30 | Crosscut Enterprises LLC | Mine roof support |
CN110030024A (en) * | 2019-03-29 | 2019-07-19 | 华北水利水电大学 | The flexible support device and cut top gob side entry retaining gear cash support system that constant-resistance can contract |
EP3953567A4 (en) | 2019-04-11 | 2022-12-07 | Burrell Mining Products, Inc. | Mine roof support, pre-installation assembly for same, and method of installation |
CN111997663B (en) * | 2020-09-30 | 2022-03-01 | 长沙矿山研究院有限责任公司 | Energy-absorbing yielding type steel support and supporting process thereof |
CN112253183B (en) * | 2020-09-30 | 2022-03-01 | 长沙矿山研究院有限责任公司 | Energy-absorbing profiling active support structure for arch roadway and support method thereof |
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DE1073420B (en) * | 1960-01-21 | Elfried Bellmann, geb. Vogelsang, Hagen (Westf.)-Haspe, Ruth Kronsbein, geb. Bellmann und Friedhelm Bellmann, Hagen (Westf.) | Extendable pit ram | |
DE1156736B (en) * | 1962-10-12 | 1963-11-07 | Ewald Wiemann Maschf | Pit stamp |
US4167361A (en) * | 1978-08-30 | 1979-09-11 | Mine Safety Appliances Company | Temporary mine roof prop |
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DE4316390C1 (en) * | 1993-05-17 | 1994-04-21 | Volker Merz | Consolidation support for mine or tunnel - has hollow upper and lower support parts, upper part being pushable into lower part, and floor of upper part being formed as plate |
DE4338830C1 (en) * | 1993-11-13 | 1995-05-11 | Bochumer Eisen Heintzmann | Support which is compliant under the influence of a load to be absorbed and is intended for use in underground chambers |
-
1995
- 1995-04-20 DE DE29507774U patent/DE29507774U1/en not_active Expired - Lifetime
- 1995-04-20 DE DE19514137A patent/DE19514137C2/en not_active Expired - Fee Related
- 1995-12-04 ZA ZA9510280A patent/ZA9510280B/en unknown
-
1996
- 1996-04-19 CN CN96194106.5A patent/CN1064734C/en not_active Expired - Fee Related
- 1996-04-19 WO PCT/EP1996/001634 patent/WO1996033336A1/en active IP Right Grant
- 1996-04-19 AU AU55010/96A patent/AU699612B2/en not_active Ceased
- 1996-04-19 PL PL96322873A patent/PL179979B1/en not_active IP Right Cessation
- 1996-04-19 DE DE59602449T patent/DE59602449D1/en not_active Expired - Fee Related
- 1996-04-19 EP EP96912021A patent/EP0824633B1/en not_active Expired - Lifetime
- 1996-04-19 US US08/875,643 patent/US5921718A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9633336A1 * |
Also Published As
Publication number | Publication date |
---|---|
ZA9510280B (en) | 1996-09-06 |
DE59602449D1 (en) | 1999-08-19 |
CN1064734C (en) | 2001-04-18 |
AU5501096A (en) | 1996-11-07 |
DE19514137C2 (en) | 1997-02-13 |
DE19514137A1 (en) | 1996-10-24 |
WO1996033336A1 (en) | 1996-10-24 |
PL322873A1 (en) | 1998-03-02 |
AU699612B2 (en) | 1998-12-10 |
EP0824633B1 (en) | 1999-07-14 |
PL179979B1 (en) | 2000-11-30 |
CN1185193A (en) | 1998-06-17 |
US5921718A (en) | 1999-07-13 |
DE29507774U1 (en) | 1995-08-24 |
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