EP0472545A1 - Flexible telescopic prop for building materials. - Google Patents
Flexible telescopic prop for building materials.Info
- Publication number
- EP0472545A1 EP0472545A1 EP90906874A EP90906874A EP0472545A1 EP 0472545 A1 EP0472545 A1 EP 0472545A1 EP 90906874 A EP90906874 A EP 90906874A EP 90906874 A EP90906874 A EP 90906874A EP 0472545 A1 EP0472545 A1 EP 0472545A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner tube
- element according
- tube
- filled
- tubes
- 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
- 239000004566 building material Substances 0.000 title claims abstract description 35
- 238000005065 mining Methods 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 8
- 235000011837 pasties Nutrition 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims 1
- 230000005641 tunneling Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 abstract description 3
- 239000004035 construction material Substances 0.000 abstract 2
- 241000251468 Actinopterygii Species 0.000 abstract 1
- 239000000945 filler Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000006049 ring expansion reaction Methods 0.000 description 2
- 210000002105 tongue Anatomy 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 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
- E21D15/16—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
- E21D15/48—Chocks or the like
Definitions
- the invention relates to an expansion element for use in underground mining and tunnel construction, in particular for securing the mined cavities in longwall and stretch, with an outer and inner tube which can be pushed into one another and a filling which keeps both tubes at a distance from one another.
- So-called one-way expansion is still used in many areas of underground mining. It mainly consists of appropriately dimensioned wooden stamps, channel supports, double T-beams and the like. Often, however, hydraulic individual punches are also used for these in addition or only, but this results in a considerable cost burden owing to the high production costs.
- the required expansion support pressure can advantageously be maintained by pressure in the hydraulic system (300 to 600 bar) and by precisely working pressure relief valves. All stamps in the system are characterized by identical characteristics. The support of the mountains is technically optimally solved by such hydraulic systems in a mobile version. With stationary training, however, the disadvantages described above occur.
- the invention is therefore based on the object of creating an early-bearing, high-pressure-absorbing, easy-to-use, serving as a one-way expansion element.
- the plunger is composed of two or more outer and inner tubes which form a telescopic tube which is continuous on the inside and is closed at the ends and which are designed to be braced against one another in different lengths, and have drainage bores distributed over the length have and that the filling is formed by a curable material core.
- the one-way expansion according to the invention can thus introduce considerable forces into the mountains as soon as the building material has been filled in and hardened.
- it is advantageously anchored securely so that it can then be filled with concrete or building material without risk. Since the building material is only filled in afterwards, an easy-to-use solution for disposable construction is created, which is also characterized by the fact that concrete or building material can be pumped in in liquid form, since the excess water is drained through the building material drainage device, that is that is, the drainage holes are removed and discharged.
- the filled building material forms a stable capable building material core, which is considerably stabilized by the enveloping steel tube and is shaped in such a way that it can take on high supporting forces of well over 100 tons and compressive forces. Since the core of the building material stands in both pipe sections as a supporting column after hardening, the mechanics providing the prestressing are no longer of any importance, so that simple and inexpensive mechanics can be used here.
- the telescopic stamp according to the invention provides a preload of approximately 47 kg / N.
- a plurality of strips guided between the outer and inner tube strike on the one hand at the upper end of the outer tube and on the other hand pass through openings at the lower and around the lower end of the inner tube and on a collection arranged in the inner tube be fastened be and that the collecting disc is simultaneously connected via a central belt with a winding roller arranged in and on the opposite inner tube end.
- the strips can perform their function without the risk of tearing, in order to bring the two outer and inner tubes apart.
- the invention provides that the winding roll is assigned to the crown plate designed as a crown plate held by two U-plates and is designed as a hollow tube which is open on both sides and which is in the two U-plates and a bore in the inner tube and is equipped with a check valve arranged at the opposite end, in front of the inner wall of the inner tube end, or a spring-loaded slide. Since the winding roll is accommodated at the upper end, that is to say in the area of the head plate, complete filling of the telescopic tube with building material is ensured in this way. chert, whereby it is ensured via the non-return flap or the slide that after the filling the still flowable building material cannot flow out.
- the invention provides that in the area of the second U-plate a backstop is arranged in the form of a rope that wraps around the winding roller several times and is fixed on both sides and a spring that engages in the middle of the rope.
- This non-return check works on the principle of rope friction.
- the rope which wraps several times around the winding roll in such a way that its ends are attached and a spring is attached in the middle of the rope, the necessary friction forces are produced which prevent the winding roll, once wound up, from running back.
- Rotation of the winding roller is achieved with the aid of a winding bolt which engages on a roll pin penetrating the winding roller.
- a mechanism for tensioning the two pieces of pipe which can be pushed into one another is also one in which the winding roller is designed as a capstan winch and is placed on the outside on the upper edge of the outer tube and that bands corresponding to the capstan winch are arranged on the outer wall of the inner tube.
- the diameter tolerance between the inner and outer tube is selected such that two or three thin cables or straps are tensioned on the inner tube so that the inner tube held in this way can still be inserted into the outer tube.
- the ropes are also guided around the tongues at the lower end of the inner tube, so that destruction or damage cannot occur.
- the capstan winch ensures a favorable opening torque and prevents accidental unrolling.
- the inner tube has sheet metal strips with a half thread that run in the longitudinal direction on the outside on, the winding roll is provided as corresponding endless screws with hexagon socket on the free end attached to the upper edge of the outer tube and the whole is easily rotatable in this way, the inner tube being "unscrewed” from the outer tube via the endless screws .
- the bands and the central band consist of plastic, preferably a cord strap polyester.
- This material can also be used as a filling, it being provided that the filling is formed from a two-component plastic when the holes are dispensed with and is provided with reinforcement, preferably in the overlap area between the outer and inner tubes.
- reinforcement preferably in the overlap area between the outer and inner tubes.
- the invention provides that the filling is assigned a deformation element which prevents transverse expansion, preferably in the form of a cartridge filled with lightweight concrete and having edges which can be pushed into one another.
- This Verformungs ⁇ element or the cartridge can be prefabricated so that there is an accurate response. Limited insertion ensures, especially in the case of unfavorable pressure long service life of such one-way expansion. If the individual one-way expansion elements are always assigned the same deformation elements, the expansion elements advantageously have the same characteristic curve.
- Transverse strains can advantageously be avoided in that the cartridge has two or more chambers, one of which is filled with a pasty mass or granular material and both are connected to one another and / or the atmosphere via a rupture disk or a valve, or that the one chamber is not hardenable putty and the other chamber are filled with steel balls or gravel.
- high forces are deliberately absorbed by displacing the pasty substance or the pasty mass or also by overcoming the resistance of the rupture disc or the valve before the desired flexibility is achieved.
- High clamping forces can be applied in particular if the punch does not slip out of the predetermined position, which is ensured in that the head plate is assigned a fabric cushion that can be filled with building material and is fixed outside between the cams.
- a fabric cushion advantageously results in a positive connection between the two expansion elements to be connected to one another.
- a kind of ring expansion is achieved in that the top plate and the base plate are equipped with corresponding connecting lugs with bolt holes and are joined together with other elements to form a multi-layered expansion arch. Additional forces can be absorbed here by fabric cushions if they be arranged in the joint areas.
- the invention is characterized in particular by the fact that a very versatile and, in particular, pre-tensionable one-way expansion is created which, moreover, is easy to handle and can be transported cheaply.
- This one-way expansion significantly increases the security of expansion because it is installed according to the respective application and has to be provided with a building material core that takes on high support forces.
- the building material is filled with pressure through the inner tube after the two tubes have been pulled apart or pressed apart by the tensioning device, which at the same time ensures uniform and complete filling.
- the sheathing through the pipe pieces which are also suitable and designed in such a way that tensile forces can also be taken over, has a particularly advantageous effect, for example under a corresponding load.
- An early destruction of the outer and inner tubes forming a kind of formwork is practically excluded, whereby the service life of the tubes can also be significantly increased by choosing the quality of the corresponding tubes, especially also by arranging the deformation elements which result in a limited flexibility.
- Fig. 3 shows the connection area between the extension arch and telescopic stamp in an enlarged view.
- Fig. 4 shows the one-way stamp according to Fig. 1 in another
- Longitudinal section, 5 shows the head region of the disposable stamp in enlarged representation with a longitudinally cut winding roll
- FIG. 10 shows an insertable design of the deformation element
- Fig. 15 shows a one-way expansion from several articulated emente ⁇ .
- the one-way expansion (2) consisting of elements (1) is shown in the form of a stamp.
- the disposable extension (2) here consists of two pieces of pipe which are dimensioned such that they can be guided into one another. Accordingly, the inner tube (4) has a smaller diameter than the outer tube (5).
- the filling (6) shown in FIG. 1 is filled in in the form of a building material core, via which the one-way removal (2) is then able, to absorb high pressure forces. Tests have shown that a 4.4 m long punch with a diameter of 3oo mm has a load capacity of 395 tons.
- the belts (7, 8) extending between the inner tube (4) and the outer tube (5) are provided, which have openings (9 ) are passed through the respective wall of the inner tube or outer tube.
- the openings are designated by (9 or 9 ') and have a special shape in that they form a tongue by folding over a corresponding section. 2 shows this particularly clearly in the lower area.
- the bands (7, 8) are fixed to the free end of the outer tube (5) and in the area of the lower end of the inner tube
- a central band (11) is diverted on the upper side of the collecting disc (10) and is fixed to a winding roller (14) at the opposite inner tube end (12) in the area of the head plate (13).
- This winding roll (14) can be operated from the outside, so that by winding the central band
- the guide ring (57) at the open end (56) of the outer tube (5) serves this purpose.
- the winding roll (14) is securely mounted via a holder (16) which is connected to the head plate (13).
- Two spaced U-plates (17, 18) serve as the holder (16), so that the winding roller (14) is mounted at a total of four locations and can therefore be rotated in the steel tube (1) from the outside without any problems.
- Fig. 2 shows an application for one-way expansion.
- a route (28) is shown here, which is secured by expansion arches (29).
- These expansion arches (29) consist of different segments (31, 32) held together by connections (3o), which slide into each other when the frictional forces exerted by the connection (3o) are exceeded, so that the cross section of the route secured by the expansion ( 28) reduced accordingly.
- the one-way extension (2, 33) is inserted between the track base (36) and the track ridge (37) in such a way that it can absorb corresponding supporting forces. This ensures that the cross section required for the conveyor belts (34) and the industrial conveyor track (35) is maintained for a very long time.
- a bore (65) is provided in the inner tube (4) (FIG. 5), through which the building material can be filled into the entire element (1). This hole is closed by a non-return valve (67) in order to prevent the filled building material from flowing back after the filling process.
- FIG. 3 shows the upper end region of a stamp which is provided for supporting the upper segment of the extension sheet (29) according to FIG. 2.
- a fabric cushion (91) is arranged, which after the curing of the building material contained in the fabric cushion (91) closely around the extension arch (29) and around the head plate (13), so that a form ⁇ conclusive association is given.
- 5 and 6 show the upper area of the one-way installation (2).
- the seal (64) is provided in the front area of the winding roll (14).
- the U-plate (17) is connected to the head plate (13) via the screw connection (72), just as the U-plate (18) is fixed to the head plate (13) via the screw connection (78).
- (73) holding screws are designated, by means of which the central band (11) is fixed to the winding roll (14).
- a simple brake for the winding roller (14) is created via the backstop (74), which consists of a rope wound several times around the winding roller (14), which is fixed at the end by means of a rope lock (79).
- a spring (77) is attached via the rope loop (76), which ensures that the rope (75) with its various turns always lies firmly against the winding roller (14).
- the mode of operation and the holder are particularly clear from Fig. 6, wherein the Be 1 locking (79) covers both ends of the rope (75).
- Fig. 6 also shows that a very inexpensive to fill filler 1 is given over the winding roll (14).
- a winding pin is provided which can be inserted into the winding roll (14) and which is fixed to the dowel pin (7o) via the oblique and transverse slots assigned to it.
- Fig. 7 shows another embodiment of the egg nphilll 1 nozzle (lo ⁇ ), which is secured here via a slide (lo9), which in turn is loaded via a spring (111) so that it automatically also the bore after pulling out the filling (65) in the inner tube (4) closes again.
- FIG. 8 shows the deformation element (95) already indicated in FIG. 1 and arranged in the lower region of the outer tube (5), in the form of a prefabricated cartridge (96).
- FIGS. 9 and 10 where FIG. 10 shows an embodiment where a certain lightweight concrete (97) is arranged within the cartridge (96), which pushes the mutually fitting edges (98, 99) together ) having parts of the cartridge (96).
- the one-way extension (2) can then move as the inner and outer pipes (4, 5) slide into each other as far as the lightweight concrete allows.
- a cartridge (96) with two chambers (loo, lol) is provided, which is integrated in the one-way fitting (2), the lower chamber (lol) being filled with a pasty mass (lo2). Both chambers (loo, lol) are separated by a rupture disc (lo3), which ensures that the deformation element (9) does not accidentally slide together.
- Gravel (lo4) is filled in the upper chamber (loo), into which the pasty mass (lo2) must be pressed when the rupture disk (lo3) is crushed. When the pasty mass (lo2) is pressed into the chamber (loo) and thus into the gravel (lo4), the deformation element (95) is compressed and the disposable extension (2) is given in.
- FIG. 11 shows the embodiment already described above, in which a corresponding band (7, 8) is fixed on one side at the fixed point (113) and then down around the lower end and the deflection rollers (112) arranged there upwards again Edge (15) is returned, where a winding roll (14) arranged in a housing (llo) is positioned. With this winding roll (14), when the tape (7, 8) is wound up, the inner tube (4) is lifted or pushed out of the outer tube (5).
- the winding roll (14) is also placed on the upper edge (15) of the outer tube (5).
- the winding roll (14) consists of an endless screw (20) which engages in the sheet metal strip (19) placed on the outer wall of the inner tube (4).
- the worm screw (2o) has a hexagon socket (21) at the free end (22) so that it can be turned easily.
- the sheet metal strip (19) is provided with a half thread, as is realized on adjustable hose clamps.
- the endless screw (2o) equipped with the hexagon socket (21) the holder (16) being shown in the form of a simple push-on cap.
- FIG. 13 A further embodiment is shown in FIG. 13, where ropes or bands are provided distributed around the circumference.
- These steel strips (24) in this embodiment are fixed to the lower end of the inner tube (4), for example via the fixing washer and then through the space between the inner tube (4) and the outer tube (5), in order to at the upper end of the outer tube (5 ) to be led outside again.
- a band end piece (25) is also fixed in the form of a steel band, so that with the help of a commercially available tensioning and locking device for extending the telescope, the two bands are simply moved against each other. In the end position, locking (26) then takes place.
- Corresponding apparatus and also the connection of the steel strips (24, 25) is known, for example, in the packaging industry.
- a reinforcement (45) is attached, which can also be provided in the other areas to stabilize the building material core (6).
- an extension arch (89) can be created from the one-way expansion (2) by connecting the various steel pipes (1, 1 ', 1' 1 , 1 1 ' 1 ) together, for which purpose the individual steel pipes or stamps each have connecting straps (85, 86) with bolt bores (88) and bolts (87).
- Fabric cushions (92) filled with building material can be arranged in the area of the kink points or the connections. The overall result is an arch shape that is similar to the ring expansion.
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)
- Building Environments (AREA)
- Tents Or Canopies (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Une structure pour soutenir des cavités minières dans le creusement de mines et de tunnels au fond comprend des étais ou des éléments (1) remplis d'un matériau de construction (6). Ces éléments (1) se composent de plusieurs tubes intérieurs et extérieurs téléscopiques (4, 5) qui peuvent être croisillonnés les uns contre les autres et contre les faîtes et les murs au moyen d'un mécanisme approprié. L'étai téléscopique est d'abord croisillonné de cette manière puis rempli de matériau de construction (6). Le matériau de construction (6) peut être rapidement et avantageusement durci au moyen d'un système de drainage, notamment de perçages de drainage (49, 50), et par conséquent une structure de ce type peut encaisser des efforts de soutènement élevés. Le noyau du matériau de construction est assujetti par les tubes extérieurs et intérieurs (5, 4) qui font office de gaine. Une armature (45) peut également être insérée afin d'augmenter encore les efforts de soutènement à encaisser. Cet étai téléscopique comportant différents tubes extérieurs et intérieurs (4, 5) s'utilise pour réaliser une arche de soutènement (89) en plusieurs tronçons. Chaque face terminale des tubes intérieurs et extérieurs (4, 5) porte des éclisses (85, 86) pourvues de perçages (88), permettant ainsi de réaliser une jonction articulée très simple.A structure for supporting mining cavities in the digging of mines and underground tunnels comprises struts or members (1) filled with a construction material (6). These elements (1) consist of several inner and outer telescopic tubes (4, 5) which can be crossed against each other and against the ridges and walls by means of a suitable mechanism. The telescopic prop is first braced in this way and then filled with construction material (6). The building material (6) can be quickly and advantageously hardened by means of a drainage system, in particular drainage bores (49, 50), and therefore a structure of this type can withstand high support forces. The core of the building material is secured by the outer and inner tubes (5, 4) which act as a sheath. A frame (45) can also be inserted in order to further increase the supporting forces to be absorbed. This telescopic prop comprising various outer and inner tubes (4, 5) is used to produce a supporting arch (89) in several sections. Each end face of the inner and outer tubes (4, 5) carries fish plates (85, 86) provided with holes (88), thus making it possible to achieve a very simple articulated junction.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90906874T ATE93577T1 (en) | 1989-05-16 | 1990-05-10 | FLEXIBLE BUILDING MATERIAL TELESCOPIC PUNCH. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3915837 | 1989-05-16 | ||
DE3915837A DE3915837A1 (en) | 1989-05-16 | 1989-05-16 | Plastic-filled telescopic prod. - with plastic bands joining inner and outer steel tube |
DE4000310 | 1990-01-08 | ||
DE4000310A DE4000310A1 (en) | 1989-05-16 | 1990-01-08 | FLEXIBLE BUILDING MATERIAL TELESCOPE STAMP |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0472545A1 true EP0472545A1 (en) | 1992-03-04 |
EP0472545B1 EP0472545B1 (en) | 1993-08-25 |
Family
ID=25880898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90906874A Expired - Lifetime EP0472545B1 (en) | 1989-05-16 | 1990-05-10 | Flexible telescopic prop for building materials |
Country Status (12)
Country | Link |
---|---|
US (1) | US5240354A (en) |
EP (1) | EP0472545B1 (en) |
CN (1) | CN1028889C (en) |
AU (1) | AU638249B2 (en) |
CA (1) | CA2057922A1 (en) |
CS (1) | CS239090A3 (en) |
DE (2) | DE4000310A1 (en) |
ES (1) | ES2044581T3 (en) |
HU (1) | HUT61381A (en) |
MA (1) | MA21845A1 (en) |
PL (1) | PL164180B1 (en) |
WO (1) | WO1990014499A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2010257264B1 (en) * | 2010-08-02 | 2011-06-23 | Craig Barnet | An Improved Prop for Mining, Construction and the Like |
US20120148350A1 (en) * | 2010-12-10 | 2012-06-14 | Kenneth Poulson | Mine prop jack and method of prestressing a mine prop |
CN102135002A (en) * | 2011-01-27 | 2011-07-27 | 东北大学 | Remotely controlled mechanical telescopic support pillar |
CN104594924B (en) * | 2014-11-13 | 2017-03-08 | 广东安元矿业勘察设计有限公司 | A kind of using method of back-up sand formula mining pillar |
CN106640163B (en) * | 2017-01-09 | 2019-03-19 | 广东安元矿业勘察设计有限公司 | Sectional shelf-unit shield type breast stoping |
CN111927487B (en) * | 2020-08-08 | 2022-03-08 | 郑州航空工业管理学院 | Underground construction support bracket |
CN117646639B (en) * | 2024-01-25 | 2024-04-02 | 北京科技大学 | Mining portable full-section supporting metal net temporary supporting device and method |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB128580A (en) * | 1918-06-20 | 1919-12-18 | Arrow Grip Mfg Company Inc | Improvement in Roller Base Lifting Jack. |
DE476783C (en) * | 1927-10-21 | 1929-05-25 | Ernest Windsor Bowen | Drying chamber in which the goods are guided over heating elements by means of an endless conveyor belt |
DE818332C (en) * | 1950-06-27 | 1951-10-25 | Mannesmann Ag | Two-part, yielding pit or route stamp |
US3396545A (en) * | 1965-04-07 | 1968-08-13 | Tech Inc Const | Method of forming concrete bodies |
US3469358A (en) * | 1968-02-01 | 1969-09-30 | Arlo Inc | Method for pumping a column |
US3891184A (en) * | 1974-07-01 | 1975-06-24 | Meredith Fields | Multi-purpose lift device |
US4185940A (en) * | 1977-11-08 | 1980-01-29 | Klaus Spies | Method and system for supporting a roof |
US4332512A (en) * | 1979-05-22 | 1982-06-01 | Bochumer Eisenhuette Heintzmann Gmbh & Co. | Arrangement for erecting columnar supporting elements for underground excavations |
US4255071A (en) * | 1979-08-27 | 1981-03-10 | Bochumer Eisenhutte Heintzmann Gmbh & Co. | Supporting of excavation roofs |
GB2100318A (en) * | 1981-05-13 | 1982-12-22 | Ogc Research & Dev Ltd | Improvements in and relating to support members |
GB2114183A (en) * | 1982-01-19 | 1983-08-17 | Barker And Company Limited R E | Adjustable support element |
DE3236421A1 (en) * | 1982-10-01 | 1984-05-17 | Ruhrkohle Ag, 4300 Essen | Yielding roadway support prop |
-
1990
- 1990-01-08 DE DE4000310A patent/DE4000310A1/en not_active Ceased
- 1990-05-10 WO PCT/DE1990/000330 patent/WO1990014499A2/en active IP Right Grant
- 1990-05-10 US US07/773,615 patent/US5240354A/en not_active Expired - Fee Related
- 1990-05-10 DE DE90906874T patent/DE59002491D1/en not_active Expired - Fee Related
- 1990-05-10 HU HU904363A patent/HUT61381A/en unknown
- 1990-05-10 ES ES90906874T patent/ES2044581T3/en not_active Expired - Lifetime
- 1990-05-10 CA CA002057922A patent/CA2057922A1/en not_active Abandoned
- 1990-05-10 EP EP90906874A patent/EP0472545B1/en not_active Expired - Lifetime
- 1990-05-10 AU AU55535/90A patent/AU638249B2/en not_active Ceased
- 1990-05-15 MA MA22111A patent/MA21845A1/en unknown
- 1990-05-16 CN CN90104394A patent/CN1028889C/en not_active Expired - Fee Related
- 1990-05-16 PL PL90285206A patent/PL164180B1/en unknown
- 1990-05-16 CS CS902390A patent/CS239090A3/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9014499A2 * |
Also Published As
Publication number | Publication date |
---|---|
DE4000310A1 (en) | 1991-07-11 |
HU904363D0 (en) | 1992-04-28 |
AU5553590A (en) | 1990-12-18 |
US5240354A (en) | 1993-08-31 |
DE59002491D1 (en) | 1993-09-30 |
AU638249B2 (en) | 1993-06-24 |
HUT61381A (en) | 1992-12-28 |
CN1028889C (en) | 1995-06-14 |
PL164180B1 (en) | 1994-06-30 |
ES2044581T3 (en) | 1994-01-01 |
PL285206A1 (en) | 1991-01-14 |
CN1051608A (en) | 1991-05-22 |
EP0472545B1 (en) | 1993-08-25 |
CA2057922A1 (en) | 1990-11-17 |
MA21845A1 (en) | 1990-12-31 |
CS239090A3 (en) | 1992-07-15 |
WO1990014499A3 (en) | 1991-02-21 |
WO1990014499A2 (en) | 1990-11-29 |
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